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Acquisitions - Summary of Estimated Fair Value of Assets Acquired and Liabilities Assumed (Details) - Evans Bancorp, Inc [Member] $ in Thousands	May 02, 2025 USD ($)
Acquisitions [Abstract]
Cash paid to shareholders (fractional shares)	$ 25
Common stock issuance	221,767
Total net consideration	221,792
Cash and cash equivalents	40,197
Securities available for sale	255,487
Securities held to maturity	3,494
Loans, net of allowance for credit losses on purchased credit deteriorated loans	1,665,712
Premises and equipment, net	15,069
Bank owned life insurance	44,100
Other assets	71,131
Total identifiable assets acquired	2,128,430
Deposits	(1,864,049)
Borrowings	(113,712)
Other liabilities	(19,492)
Total liabilities assumed	(1,997,253)
Total identifiable assets, net	131,177
Goodwill	90,615
Core Deposits Intangibles [Member
Acquisitions [Abstract]
Core deposit intangibles	$ 33,240

Acquisitions - Fair Value of Acquired PCD Loans (Details) - Evans Bancorp, Inc [Member] $ in Thousands	May 02, 2025 USD ($)
Acquisitions [Abstract]
Par value of PCD loans at acquisition	$ 336,398
Allowance for credit losses at acquisition	7,726
Discount at acquisition	(36,584)
Fair value of PCD loans at acquisition	$ 307,540

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

Recent Accounting Pronouncements	6 Months Ended
Recent Accounting Pronouncements	Jun. 30, 2026
Recent Accounting Pronouncements [Abstract]
Recent Accounting Pronouncements	3. Recent Accounting Pronouncements Recently Adopted Accounting Standards In November 2025, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2025-08, Financial Instruments-Credit Losses (Topic 326): Purchased Loans. The ASU expands the population of acquired financial assets subject to the gross-up approach in Topic 326, Financial Instrument-Credit Losses. In accordance with the amendments in this update, loans acquired without credit deterioration and deemed seasoned are purchased seasoned loans and accounted for using the gross-up approach at acquisition. The amendments apply prospectively and will be effective for fiscal periods beginning after December 15, 2026. The Company elected to early-adopt the ASU as of January 1, 2026. Accounting Standards Issued Not Yet Adopted In November 2024, the FASB issued ASU 2024-03, Income Statement-Reporting Comprehensive Income-Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses, that addresses longstanding investor requests for more information regarding expenses included in the expense captions presented on the face of the income statement. The ASU will require a tabular disclosure that disaggregates certain income statement expenses including employee compensation, depreciation and intangible asset amortization. In January 2025, the FASB issued ASU 2025-01, Income Statement-Reporting Comprehensive Income-Expense Disaggregation Disclosures (Subtopic 220-40): Clarifying the Effective Date, which revises the effective date of ASU 2024-03. The ASU will become effective in the annual reporting periods beginning after December 15, 2026, and early adoption is permitted. Aside from complying with the new disclosure requirements, the adoption is not expected to have a material impact on the consolidated financial statements. In December 2025, the FASB issued ASU 2025-11, Interim Reporting (Topic 270): Narrow-Scope Improvements, which clarifies the guidance in Topic 270 to improve the consistency of interim financial reporting. The ASU provides a comprehensive list of required interim disclosures and introduces a disclosure principle requiring entities to disclose events since the end of the last annual reporting period that have a material impact on the entity. ASU 2025-11 is effective for fiscal years beginning after December 15, 2027, including interim periods within those fiscal years, with early adoption permitted. Aside from complying with the new disclosure requirements, the adoption is not expected to have a material impact on the consolidated financial statements.

- Definition

The entire disclosure for change in accounting principle. Includes, but is not limited to, nature, reason, and method of adopting amendment to accounting standards or other change in accounting principle.

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Reference 30: http://www.xbrl.org/2003/role/disclosureRef
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Reference 32: http://www.xbrl.org/2003/role/disclosureRef
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Reference 35: http://www.xbrl.org/2003/role/disclosureRef
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-Section 65
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Reference 36: http://www.xbrl.org/2003/role/disclosureRef
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Reference 37: http://www.xbrl.org/2003/role/disclosureRef
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Reference 38: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Acquisitions - Unaudited Pro Forma Information (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2025
Acquisitions [Abstract]
Total revenue, net of interest expense	$ 177,453	$ 349,366
Net income	$ 12,930	$ 52,859

Fair Value Measurements and Fair Value of Financial Instruments - Estimated Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Carrying Amount [Member] \| Level 2 [Member]
Financial assets:
HTM securities	$ 755,086	$ 762,756
Financial liabilities:
Time deposits	1,328,884	1,492,445
Long-term debt	43,043	43,176
Junior subordinated debt	111,714	111,668
Carrying Amount [Member] \| Level 3 [Member]
Financial assets:
Net loans	11,733,581	11,461,222
Carrying Amount [Member] \| Level 1 [Member]
Financial liabilities:
Subordinated debt	0	24,509
Estimated Fair Value [Member] \| Level 2 [Member]
Financial assets:
HTM securities	692,689	702,577
Financial liabilities:
Time deposits	1,315,245	1,484,165
Long-term debt	42,965	43,395
Junior subordinated debt	97,775	98,841
Estimated Fair Value [Member] \| Level 3 [Member]
Financial assets:
Net loans	11,528,110	11,337,753
Estimated Fair Value [Member] \| Level 1 [Member]
Financial liabilities:
Subordinated debt	$ 0	$ 24,016

Loans

6 Months Ended

Jun. 30, 2026

Loans [Abstract]

Loans

6. Loans

A summary of loans, net of deferred fees and origination costs, by category⁽¹⁾ is as follows:


(In thousands)	June 30, 2026		December 31, 2025
Commercial & industrial	$	1,755,123	$	1,671,974
Commercial real estate		4,893,543		4,798,957
Residential mortgage		2,558,338		2,537,593
Home equity		465,340		448,113
Indirect auto		1,450,482		1,340,524
Residential solar		693,177		736,970
Other consumer		58,078		63,983
Total loans	$	11,874,081	$	11,598,114

(1)

Loans are summarized by business line which does not align to how the Company assesses credit risk in the allowance for credit losses under CECL.

Included in the above loans are net deferred loan origination (fees) costs totaling $(27.6) million and $(37.9) million at June 30, 2026 and December 31, 2025, respectively.

Securities - Gains and (Losses) on Equity Securities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Securities [Abstract]
Net gains (losses) recognized on equity securities	$ 175	$ 112	$ 617	$ 8
Less: Net gains (losses) recognized on equity securities sold during the period	0	(35)	0	(35)
Unrealized gains (losses) recognized on equity securities still held	$ 175	$ 147	$ 617	$ 43

Fair Value Measurements and Fair Value of Financial Instruments

6 Months Ended

Jun. 30, 2026

Fair Value Measurements and Fair Value of Financial Instruments [Abstract]

Fair Value Measurements and Fair Value of Financial Instruments

13. Fair Value Measurements and Fair Value of Financial Instruments

GAAP states that fair value is an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. Fair value measurements are not adjusted for transaction costs. A fair value hierarchy exists within GAAP that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). The three levels of the fair value hierarchy are described below:

Level 1 - Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities;

Level 2 - Quoted prices for similar assets or liabilities in active markets, quoted prices in markets that are not active or inputs that are observable, either directly or indirectly, for substantially the full term of the asset or liability; and

Level 3 - Prices or valuation techniques that require inputs that are both significant to the fair value measurement and unobservable (i.e., supported by little or no market activity).

A financial instrument’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement.

The types of instruments valued based on quoted market prices in active markets include most U.S. government and agency securities, many other sovereign government obligations, liquid mortgage products, active listed equities and most money market securities. Such instruments are generally classified within Level 1 or Level 2 of the fair value hierarchy. The Company does not adjust the quoted prices for such instruments.

The types of instruments valued based on quoted prices in markets that are not active, broker or dealer quotations or quotes from alternative pricing sources with reasonable levels of price transparency include most investment-grade and high-yield corporate bonds, less liquid mortgage products, less liquid agency securities, less liquid listed equities, state, municipal and provincial obligations and certain physical commodities. Such instruments are generally classified within Level 2 of the fair value hierarchy. Certain common equity securities are reported at fair value utilizing Level 1 inputs (exchange quoted prices). Other investment securities are reported at fair value utilizing Level 1 and Level 2 inputs. The prices for Level 2 instruments are obtained through an independent pricing service or dealer market participants with whom the Company has historically transacted both purchases and sales of investment securities. Prices obtained from these sources include prices derived from market quotations and matrix pricing. The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury yield curve, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the bond’s terms and conditions, among other factors. Management reviews the methodologies used by its third-party providers in pricing the securities.

Level 3 is for positions that are not traded in active markets or are subject to transfer restrictions. Valuations are adjusted to reflect illiquidity and/or non-transferability and such adjustments are generally based on available market evidence. In the absence of such evidence, management’s best estimate will be used. Management’s best estimate consists of both internal and external support on certain Level 3 investments. Subsequent to inception, management only changes Level 3 inputs and assumptions when corroborated by evidence such as transactions in similar instruments, completed or pending third-party transactions in the underlying investment or comparable entities, subsequent rounds of financing, recapitalizations and other transactions across the capital structure, offerings in the equity or debt markets and changes in financial ratios or cash flows.

The following tables set forth the Company’s financial assets and liabilities measured on a recurring basis that were accounted for at fair value. Assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement:


(In thousands)	Level 1		Level 2		Level 3		June 30, 2026
Assets:
AFS securities:
U.S. treasury	$	101,758	$	-	$	-	$	101,758
Federal agency		-		231,129		-		231,129
State & municipal		-		81,122		-		81,122
Mortgage-backed		-		734,835		-		734,835
Collateralized mortgage obligations		-		835,648		-		835,648
Corporate		-		21,714		-		21,714
Total AFS securities	$	101,758	$	1,904,448	$	-	$	2,006,206
Equity securities		49,732		1,000		-		50,732
Derivatives		-		54,699		-		54,699
Total	$	151,490	$	1,960,147	$	-	$	2,111,637
Liabilities:
Derivatives	$	-	$	72,053	$	-	$	72,053
Total	$	-	$	72,053	$	-	$	72,053


(In thousands)	Level 1		Level 2		Level 3		December 31, 2025
Assets:
AFS securities:
U.S. treasury	$	76,822	$	-	$	-	$	76,822
Federal agency		-		231,276		-		231,276
State & municipal		-		86,727		-		86,727
Mortgage-backed		-		591,562		-		591,562
Collateralized mortgage obligations		-		855,486		-		855,486
Corporate		-		20,965		-		20,965
Total AFS securities	$	76,822	$	1,786,016	$	-	$	1,862,838
Equity securities		47,760		1,000		-		48,760
Derivatives		-		52,104		-		52,104
Total	$	124,582	$	1,839,120	$	-	$	1,963,702
Liabilities:
Derivatives	$	-	$	68,066	$	-	$	68,066
Total	$	-	$	68,066	$	-	$	68,066

GAAP requires disclosure of assets and liabilities measured and recorded at fair value on a non-recurring basis such as goodwill, loans held for sale, other real estate owned, collateral-dependent loans individually evaluated for expected credit losses and HTM securities. As of June 30, 2026, the Company had collateral dependent individually evaluated loans with a carrying value of $31.8 million which were classified within Level 3 of the fair value hierarchy. Included in this amount were loans with fair value of $17.8 million where the amortized cost was adjusted to fair value. As of December 31, 2025, the Company had collateral dependent individually evaluated loans with a carrying value of $12.2 million which were classified within Level 3 of the fair value hierarchy. These loans with fair value of $12.2 million had their amortized cost adjusted to fair value. The Company uses the fair value of underlying collateral, less costs to sell, to estimate the allowance for credit losses for individually evaluated collateral dependent loans. The appraisals may be adjusted by management for qualitative factors such as economic conditions and estimated liquidation expenses ranging from 10% to 50%. Based on the valuation techniques used, the fair value measurements for collateral dependent individually evaluated loans are classified as Level 3.

The following table sets forth information with regard to estimated fair values of financial instruments. This table excludes financial instruments for which the carrying amount approximates fair value. Financial instruments for which the fair value approximates carrying value include cash and cash equivalents, AFS securities, equity securities, AIR, non-maturity deposits, short-term borrowings, accrued interest payable and derivatives.


			June 30, 2026				December 31, 2025
	Fair Value		Carrying		Estimated		Carrying		Estimated
(In thousands)	Hierarchy		Amount		Fair Value		Amount		Fair Value
Financial assets:
HTM securities		2	$	755,086	$	692,689	$	762,756	$	702,577
Net loans		3		11,733,581		11,528,110		11,461,222		11,337,753
Financial liabilities:
Time deposits		2	$	1,328,884	$	1,315,245	$	1,492,445	$	1,484,165
Long-term debt		2		43,043		42,965		43,176		43,395
Subordinated debt		1		-		-		24,509		24,016
Junior subordinated debt		2		111,714		97,775		111,668		98,841

Fair value estimates are made at a specific point in time, based on relevant market information and information about the financial instrument. These estimates do not reflect any premium or discount that could result from offering for sale at one time the Company’s entire holdings of a particular financial instrument. Because no market exists for a significant portion of the Company’s financial instruments, fair value estimates are based on judgments regarding future expected loss experience, current economic conditions, risk characteristics of various financial instruments and other factors. These estimates are subjective in nature and involve uncertainties and matters of significant judgment and therefore cannot be determined with precision. Changes in assumptions could significantly affect the estimates.

Fair value estimates are based on existing on and off-balance sheet financial instruments without attempting to estimate the value of anticipated future business and the value of assets and liabilities that are not considered financial instruments. For example, the Company has a substantial wealth operation that contributes net fee income annually. The wealth management operation is not considered a financial instrument and its value has not been incorporated into the fair value estimates. Other significant assets and liabilities include the benefits resulting from the low-cost funding of deposit liabilities as compared to the cost of borrowing funds in the market and premises and equipment. In addition, the tax ramifications related to the realization of the unrealized gains and losses can have a significant effect on fair value estimates and have not been considered in the estimate of fair value.

HTM Securities - The fair value of the Company’s HTM securities is primarily measured using information from a third-party pricing service. The fair value measurements consider observable data that may include dealer quotes, market spreads, cash flows, the U.S. Treasury yield curve, live trading levels, trade execution data, market consensus prepayment speeds, credit information and the bond’s terms and conditions, among other factors.

Net Loans - Net loans include portfolio loans and loans held for sale. Loans were first segregated by type and then further segmented into fixed and variable rate and loan quality categories. Expected future cash flows were projected based on contractual cash flows, adjusted for estimated prepayments, and those expected future cash flows also includes credit risk, illiquidity risk and other market factors to calculate the exit price fair value in accordance with ASC 820.

Time Deposits - The fair value of time deposits was estimated using a discounted cash flow approach that applies prevailing market interest rates for similar maturity instruments. The fair values of the Company’s time deposit liabilities do not take into consideration the value of the Company’s long-term relationships with depositors, which may have significant value.

Long-Term Debt - The fair value of long-term debt was estimated using a discounted cash flow approach that applies prevailing market interest rates for similar maturity instruments.

Subordinated Debt - The fair value of subordinated debt has been measured using the observable market price as of the period reported.

Junior Subordinated Debt - The fair value of junior subordinated debt has been estimated using a discounted cash flow analysis.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 107
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482078/820-10-55-107

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 100
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482078/820-10-55-100

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2E
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (h)
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-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
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-Section 50
-Paragraph 2
-Subparagraph (h)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 940
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-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478119/940-820-50-1

+ Details

Derivative Instruments and Hedging Activities - Effect of Derivatives on AOCI and on Consolidated Statement of Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Derivatives Not Designated as Hedging Instruments [Member] \| Location, Statement of Income, Balance [Axis]: us-gaap:NoninterestIncomeOtherOperatingIncome
Derivative Instruments and Hedging Activities [Abstract]
(Decrease) increase in other income	$ (3)	$ (4)	$ 31	$ 17

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References + Details

Allowance for Credit Losses and Credit Quality of Loans (Tables)

6 Months Ended

Jun. 30, 2026

Allowance for Credit Losses and Credit Quality of Loans [Abstract]

Allowance for Loan Losses by Portfolio

The following tables present the activity in the allowance for credit losses by our portfolio segments:


(In thousands)	Commercial Loans			Consumer Loans			Residential			Total
Balance as of March 31, 2026	$	63,096		$	44,047		$	31,457		$	138,600
Charge-offs		(1,379	)		(4,424	)		(193	)		(5,996	)
Recoveries		107			1,478			175			1,760
Provision		2,738			2,706			692			6,136
Ending balance as of June 30, 2026	$	64,562		$	43,807		$	32,131		$	140,500
Balance as of March 31, 2025	$	48,730		$	41,696		$	26,574		$	117,000
Allowance for credit loss on PCD acquired loans		7,355			-			371			7,726
Charge-offs		(533	)		(3,837	)		(61	)		(4,431	)
Recoveries		409			1,566			95			2,070
Provision		10,060			1,444			6,331			17,835
Ending balance as of June 30, 2025	$	66,021		$	40,869		$	33,310		$	140,200


(In thousands)	Commercial Loans			Consumer Loans			Residential			Total
Balance as of December 31, 2025	$	61,725		$	42,583		$	33,692		$	138,000
Charge-offs		(3,865	)		(8,782	)		(205	)		(12,852	)
Recoveries		304			3,049			286			3,639
Provision		6,398			6,957			(1,642	)		11,713
Ending balance as of June 30, 2026	$	64,562		$	43,807		$	32,131		$	140,500
Balance as of December 31, 2024	$	45,453		$	43,987		$	26,560		$	116,000
Allowance for credit loss on PCD acquired loans		7,355			-			371			7,726
Charge-offs		(2,755	)		(9,713	)		(118	)		(12,586	)
Recoveries		516			2,972			183			3,671
Provision		15,452			3,623			6,314			25,389
Ending balance as of June 30, 2025	$	66,021		$	40,869		$	33,310		$	140,200

Past due and Nonperforming Loans by Loan Class

The following table sets forth information with regard to past due and nonperforming loans by loan segment:



(In thousands)	31–60 Days Past Due Accruing		61–90 Days Past Due Accruing		Greater Than 90 Days Past Due Accruing		Total Past Due Accruing		Nonaccrual		Current		Recorded Total Loans
As of June 30, 2026
Commercial loans:
C&I	$	1,549	$	676	$	-	$	2,225	$	10,051	$	1,719,036	$	1,731,312
CRE		26,266		12,398		-		38,664		30,508		4,642,122		4,711,294
Total commercial loans	$	27,815	$	13,074	$	-	$	40,889	$	40,559	$	6,361,158	$	6,442,606
Consumer loans:
Auto	$	12,082	$	2,183	$	590	$	14,855	$	2,677	$	1,412,524	$	1,430,056
Residential solar		3,525		1,763		934		6,222		55		686,900		693,177
Other consumer		801		465		205		1,471		117		75,096		76,684
Total consumer loans	$	16,408	$	4,411	$	1,729	$	22,548	$	2,849	$	2,174,520	$	2,199,917
Residential	$	8,392	$	2,390	$	681	$	11,463	$	19,490	$	3,200,605	$	3,231,558
Total loans	$	52,615	$	19,875	$	2,410	$	74,900	$	62,898	$	11,736,283	$	11,874,081



(In thousands)	31–60 Days Past Due Accruing		61–90 Days Past Due Accruing		Greater Than 90 Days Past Due Accruing		Total Past Due Accruing		Nonaccrual		Current		Recorded Total Loans
As of December 31, 2025
Commercial loans:
C&I	$	761	$	126	$	103	$	990	$	1,947	$	1,645,794	$	1,648,731
CRE		1,802		5,112		2,117		9,031		17,987		4,592,983		4,620,001
Total commercial loans	$	2,563	$	5,238	$	2,220	$	10,021	$	19,934	$	6,238,777	$	6,268,732
Consumer loans:
Auto	$	12,884	$	2,106	$	965	$	15,955	$	2,940	$	1,298,470	$	1,317,365
Residential solar		4,846		1,396		1,241		7,483		90		729,397		736,970
Other consumer		1,200		467		339		2,006		63		80,824		82,893
Total consumer loans	$	18,930	$	3,969	$	2,545	$	25,444	$	3,093	$	2,108,691	$	2,137,228
Residential	$	5,203	$	666	$	2,366	$	8,235	$	21,565	$	3,162,354	$	3,192,154
Total loans	$	26,696	$	9,873	$	7,131	$	43,700	$	44,592	$	11,509,822	$	11,598,114

Credit Quality by Loan Class by Year of Origination (Vintage)

The following tables illustrate the Company’s credit quality by loan class by vintage and includes gross charge-offs by loan class by vintage. Included in other consumer gross charge-offs for the six months ended June 30, 2026, the Company recorded $0.4 million in overdrawn deposit accounts reported as 2025 originations and $0.3 million in overdrawn deposit accounts reported as 2026 originations. Included in other consumer gross charge-offs for the year ended December 31, 2025, the Company recorded $0.3 million in overdrawn deposit accounts reported as 2024 originations and $0.8 million in overdrawn deposit accounts reported as 2025 originations.





(In thousands)		2026			2025			2024			2023			2022			Prior			Revolving Loans Amortized Cost Basis		Revolving Loans Converted to Term		Total
As of June 30, 2026
C&I
By internally assigned grade:
Pass	$	169,129		$	219,469		$	177,007		$	118,326		$	107,129		$	245,568		$	576,276	$	16,721	$	1,629,625
Special Mention		190			2,081			6,168			1,866			905			3,337			6,436		-		20,983
Substandard		2,253			602			3,603			6,025			10,939			13,818			37,631		390		75,261
Doubtful		-			1,250			4,137			30			25			1			-		-		5,443
Total C&I	$	171,572		$	223,402		$	190,915		$	126,247		$	118,998		$	262,724		$	620,343	$	17,111	$	1,731,312
Current-period gross charge-offs	$	-		$	(399	)	$	(84	)	$	(1,276	)	$	(48	)	$	(192	)	$	-	$	-	$	(1,999	)
CRE
By internally assigned grade:
Pass	$	302,180		$	366,113		$	453,376		$	408,916		$	619,133		$	1,800,135		$	353,987	$	44,074	$	4,347,914
Special mention		-			2,950			7,021			28,612			55,777			67,831			7,964		8,678		178,833
Substandard		299			4,647			26,980			24,091			25,557			90,661			12,069		243		184,547
Total CRE	$	302,479		$	373,710		$	487,377		$	461,619		$	700,467		$	1,958,627		$	374,020	$	52,995	$	4,711,294
Current-period gross charge-offs	$	-		$	-		$	-		$	-		$	(806	)	$	(1,060	)	$	-	$	-	$	(1,866	)
Auto
By payment activity:
Performing	$	406,028		$	461,494		$	293,880		$	148,916		$	91,504		$	24,967		$	-	$	-	$	1,426,789
Nonperforming		32			688			805			959			536			247			-		-		3,267
Total auto	$	406,060		$	462,182		$	294,685		$	149,875		$	92,040		$	25,214		$	-	$	-	$	1,430,056
Current-period gross charge-offs	$	(1	)	$	(542	)	$	(649	)	$	(582	)	$	(539	)	$	(199	)	$	-	$	-	$	(2,512	)
Residential solar
By payment activity:
Performing	$	904		$	1,878		$	2,091		$	102,747		$	346,409		$	238,159		$	-	$	-	$	692,188
Nonperforming		-			-			-			92			554			343			-		-		989
Total residential solar	$	904		$	1,878		$	2,091		$	102,839		$	346,963		$	238,502		$	-	$	-	$	693,177
Current-period gross charge-offs	$	-		$	-		$	-		$	(381	)	$	(2,867	)	$	(1,312	)	$	-	$	-	$	(4,560	)
Other consumer
By payment activity:
Performing	$	12,794		$	9,685		$	5,054		$	2,197		$	2,481		$	17,215		$	26,911	$	25	$	76,362
Nonperforming		-			41			18			16			57			147			4		39		322
Total other consumer	$	12,794		$	9,726		$	5,072		$	2,213		$	2,538		$	17,362		$	26,915	$	64	$	76,684
Current-period gross charge-offs	$	(325	)	$	(379	)	$	(85	)	$	(51	)	$	(140	)	$	(730	)	$	-	$	-	$	(1,710	)
Residential
By payment activity:
Performing	$	148,655		$	197,230		$	232,276		$	233,051		$	392,812		$	1,615,444		$	377,831	$	14,088	$	3,211,387
Nonperforming		-			88			1,436			2,382			3,050			12,961			-		254		20,171
Total residential	$	148,655		$	197,318		$	233,712		$	235,433		$	395,862		$	1,628,405		$	377,831	$	14,342	$	3,231,558
Current-period gross charge-offs	$	-		$	-		$	(23	)	$	-		$	-		$	(182	)	$	-	$	-	$	(205	)
Total loans	$	1,042,464		$	1,268,216		$	1,213,852		$	1,078,226		$	1,656,868		$	4,130,834		$	1,399,109	$	84,512	$	11,874,081
Current-period gross charge-offs	$	(326	)	$	(1,320	)	$	(841	)	$	(2,290	)	$	(4,400	)	$	(3,675	)	$	-	$	-	$	(12,852	)



(In thousands)		2025			2024			2023			2022			2021			Prior			Revolving Loans Amortized Cost Basis		Revolving Loans Converted to Term		Total
As of December 31, 2025
C&I
By internally assigned grade:
Pass	$	264,031		$	212,997		$	147,722		$	147,300		$	127,598		$	166,819		$	475,710	$	6,820	$	1,548,997
Special mention		1,063			7,729			4,131			7,010			807			2,809			7,405		-		30,954
Substandard		722			3,150			5,122			7,322			11,744			2,208			37,794		611		68,673
Doubtful		-			-			58			33			16			-			-		-		107
Total C&I	$	265,816		$	223,876		$	157,033		$	161,665		$	140,165		$	171,836		$	520,909	$	7,431	$	1,648,731
Current-period gross charge-offs	$	-		$	(497	)	$	(477	)	$	(63	)	$	(263	)	$	(1,218	)	$	-	$	-	$	(2,518	)
CRE
By internally assigned grade:
Pass	$	360,858		$	483,504		$	436,790		$	627,582		$	577,221		$	1,362,602		$	329,111	$	49,483	$	4,227,151
Special mention		5,509			7,351			22,545			50,020			15,226			62,542			7,053		-		170,246
Substandard		5,080			16,539			17,226			44,496			19,266			102,861			17,136		-		222,604
Total CRE	$	371,447		$	507,394		$	476,561		$	722,098		$	611,713		$	1,528,005		$	353,300	$	49,483	$	4,620,001
Current-period gross charge-offs	$	-		$	-		$	(178	)	$	-		$	-		$	(2,105	)	$	-	$	-	$	(2,283	)
Auto
By payment activity:
Performing	$	563,305		$	371,367		$	199,608		$	132,355		$	40,036		$	6,789		$	-	$	-	$	1,313,460
Nonperforming		547			1,185			982			738			375			78			-		-		3,905
Total auto	$	563,852		$	372,552		$	200,590		$	133,093		$	40,411		$	6,867		$	-	$	-	$	1,317,365
Current-period gross charge-offs	$	(263	)	$	(1,526	)	$	(1,320	)	$	(1,494	)	$	(609	)	$	(262	)	$	-	$	-	$	(5,474	)
Residential solar
By payment activity:
Performing	$	1,978		$	2,200		$	108,529		$	365,629		$	150,757		$	106,546		$	-	$	-	$	735,639
Nonperforming		-			-			58			761			384			128			-		-		1,331
Total Residential solar	$	1,978		$	2,200		$	108,587		$	366,390		$	151,141		$	106,674		$	-	$	-	$	736,970
Current-period gross charge-offs	$	-		$	-		$	(1,012	)	$	(5,153	)	$	(1,619	)	$	(844	)	$	-	$	-	$	(8,628	)
Other consumer
By payment activity:
Performing	$	16,080		$	7,334		$	3,257		$	4,465		$	11,689		$	13,636		$	25,995	$	35	$	82,491
Nonperforming		-			29			26			37			135			126			15		34		402
Total other consumer	$	16,080		$	7,363		$	3,283		$	4,502		$	11,824		$	13,762		$	26,010	$	69	$	82,893
Current-period gross charge-offs	$	(815	)	$	(404	)	$	(95	)	$	(941	)	$	(1,940	)	$	(1,195	)	$	-	$	-	$	(5,390	)
Residential
By payment activity:
Performing	$	192,323		$	237,485		$	244,007		$	404,751		$	473,304		$	1,242,708		$	346,079	$	27,566	$	3,168,223
Nonperforming		-			1,629			2,419			3,126			3,238			13,278			76		165		23,931
Total residential	$	192,323		$	239,114		$	246,426		$	407,877		$	476,542		$	1,255,986		$	346,155	$	27,731	$	3,192,154
Current-period gross charge-offs	$	-		$	(16	)	$	(272	)	$	(574	)	$	-		$	(54	)	$	-	$	-	$	(916	)
Total loans	$	1,411,496		$	1,352,499		$	1,192,480		$	1,795,625		$	1,431,796		$	3,083,130		$	1,246,374	$	84,714	$	11,598,114
Current-period gross charge-offs	$	(1,078	)	$	(2,443	)	$	(3,354	)	$	(8,225	)	$	(4,431	)	$	(5,678	)	$	-	$	-	$	(25,209	)

Amortized Cost Basis of Loans Modified to Borrowers Experiencing Financial Difficulty

The following tables show the amortized cost basis at the end of the reporting period of the loans modified to borrowers experiencing financial difficulty, disaggregated by class of financing receivable and type of concession granted:


	Three Months Ended June 30, 2026
	Term Extension
(Dollars in thousands)			Amortized Cost	% of Total Class of Financing Receivables
Consumer loans:
Auto		$	9	0.001	%
Total consumer loans		$	9
Residential		$	593	0.018	%
Total		$	602


	Three Months Ended June 30, 2025
	Term Extension					Combination - Term Extension and Interest Rate Reduction
(Dollars in thousands)			Amortized Cost	% of Total Class of Financing Receivables				Amortized Cost	% of Total Class of Financing Receivables
Residential		$	117	0.004	%		$	28	0.001	%
Total		$	117				$	28


	Six Months Ended June 30, 2026
	Term Extension
(Dollars in thousands)		Amortized Cost		% of Total Class of Financing Receivables
Consumer loans:
Auto		$	9		0.001	%
Total consumer loans		$	9
Residential		$	1,237		0.038	%
Total		$	1,246


	Six Months Ended June 30, 2025
	Term Extension						Combination - Term Extension and Interest Rate Reduction
(Dollars in thousands)		Amortized Cost		% of Total Class of Financing Receivables				Amortized Cost		% of Total Class of Financing Receivables
Residential		$	894		0.028	%		$	28	0.001	%
Total		$	894					$	28

Financial Effect of Modifications Made to Borrowers Experiencing Financial Difficulty

The following tables describe the financial effect of the modifications made to borrowers experiencing financial difficulties:


	Three Months Ended June 30, 2026
Loan Type	Term Extension
Auto	Added a weighted-average 1.8 years to the life of loans, which reduced monthly payment amounts for the borrowers
Residential	Added a weighted-average 8.0 years to the life of loans, which reduced monthly payment amounts for the borrowers


	Three Months Ended June 30, 2025
Loan Type	Term Extension	Interest Rate Reduction
Residential	Added a weighted-average 9.8 years to the life of loans, which reduced monthly payment amounts for the borrowers	Reduced interest by weighted average of 0.62%, which reduced the monthly payment amount for the borrowers


	Six Months Ended June 30, 2026
Loan Type	Term Extension
Auto	Added a weighted-average 1.8 years to the life of loans, which reduced monthly payment amounts for the borrowers
Residential	Added a weighted-average 5.4 years to the life of loans, which reduced monthly payment amounts for the borrowers


	Six Months Ended June 30, 2025
Loan Type	Term Extension	Interest Rate Reduction
Residential	Added a weighted-average 7.5 years to the life of loans, which reduced monthly payment amounts for the borrowers	Reduced interest by weighted average of 0.62%, which reduced the monthly payment amount for the borrowers

Performance of Modified Loans

The following tables depict the performance of loans that have been modified to borrowers experiencing financial difficulty that were modified in the prior twelve months:


	Payment Status (Amortized Cost Basis)
(In thousands)	Current		31-60 Days Past Due		61-90 Days Past Due		Greater than 90 Days Past Due
As of June 30, 2026
Consumer loans:
Auto	$	-	$	-	$	9	$	-
Total consumer loans	$	-	$	-	$	9	$	-
Residential	$	1,839	$	-	$	-	$	-
Total	$	1,839	$	-	$	9	$	-

	Payment Status (Amortized Cost Basis)
(In thousands)		Current		31-60 Days Past Due		61-90 Days Past Due		Greater than 90 Days Past Due
As of June 30, 2025
Residential		$	1,692	$	11	$	58	$	-
Total		$	1,692	$	11	$	58	$	-

Allowance for Credit Losses and Credit Quality of Loans - Credit Quality by Loan Class by Year of Origination (Vintage) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
2026/2025	$ 1,042,464		$ 1,042,464		$ 1,411,496
2025/2024	1,268,216		1,268,216		1,352,499
2024/2023	1,213,852		1,213,852		1,192,480
2023/2022	1,078,226		1,078,226		1,795,625
2022/2021	1,656,868		1,656,868		1,431,796
Prior	4,130,834		4,130,834		3,083,130
Revolving Loans Amortized Cost Basis	1,399,109		1,399,109		1,246,374
Revolving Loans Converted to Term	84,512		84,512		84,714
Total	11,874,081		11,874,081		11,598,114
2026/2025			(326)		(1,078)
2025/2024			(1,320)		(2,443)
2024/2023			(841)		(3,354)
2023/2022			(2,290)		(8,225)
2022/2021			(4,400)		(4,431)
Prior			(3,675)		(5,678)
Revolving Loans Amortized Cost Basis			0		0
Revolving Loans Converted to Term			0		0
Total	(5,996)	$ (4,431)	(12,852)	$ (12,586)	(25,209)
C&I [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
2026/2025	171,572		171,572		265,816
2025/2024	223,402		223,402		223,876
2024/2023	190,915		190,915		157,033
2023/2022	126,247		126,247		161,665
2022/2021	118,998		118,998		140,165
Prior	262,724		262,724		171,836
Revolving Loans Amortized Cost Basis	620,343		620,343		520,909
Revolving Loans Converted to Term	17,111		17,111		7,431
Total	1,731,312		1,731,312		1,648,731
2026/2025			0		0
2025/2024			(399)		(497)
2024/2023			(84)		(477)
2023/2022			(1,276)		(63)
2022/2021			(48)		(263)
Prior			(192)		(1,218)
Revolving Loans Amortized Cost Basis			0		0
Revolving Loans Converted to Term			0		0
Total			(1,999)		(2,518)
C&I [Member] \| Pass [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
2026/2025	169,129		169,129		264,031
2025/2024	219,469		219,469		212,997
2024/2023	177,007		177,007		147,722
2023/2022	118,326		118,326		147,300
2022/2021	107,129		107,129		127,598
Prior	245,568		245,568		166,819
Revolving Loans Amortized Cost Basis	576,276		576,276		475,710
Revolving Loans Converted to Term	16,721		16,721		6,820
Total	1,629,625		1,629,625		1,548,997
C&I [Member] \| Special Mention [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
2026/2025	190		190		1,063
2025/2024	2,081		2,081		7,729
2024/2023	6,168		6,168		4,131
2023/2022	1,866		1,866		7,010
2022/2021	905		905		807
Prior	3,337		3,337		2,809
Revolving Loans Amortized Cost Basis	6,436		6,436		7,405
Revolving Loans Converted to Term	0		0		0
Total	20,983		20,983		30,954
C&I [Member] \| Substandard [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
2026/2025	2,253		2,253		722
2025/2024	602		602		3,150
2024/2023	3,603		3,603		5,122
2023/2022	6,025		6,025		7,322
2022/2021	10,939		10,939		11,744
Prior	13,818		13,818		2,208
Revolving Loans Amortized Cost Basis	37,631		37,631		37,794
Revolving Loans Converted to Term	390		390		611
Total	75,261		75,261		68,673
C&I [Member] \| Doubtful [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
2026/2025	0		0		0
2025/2024	1,250		1,250		0
2024/2023	4,137		4,137		58
2023/2022	30		30		33
2022/2021	25		25		16
Prior	1		1		0
Revolving Loans Amortized Cost Basis	0		0		0
Revolving Loans Converted to Term	0		0		0
Total	5,443		5,443		107
CRE [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
2026/2025	302,479		302,479		371,447
2025/2024	373,710		373,710		507,394
2024/2023	487,377		487,377		476,561
2023/2022	461,619		461,619		722,098
2022/2021	700,467		700,467		611,713
Prior	1,958,627		1,958,627		1,528,005
Revolving Loans Amortized Cost Basis	374,020		374,020		353,300
Revolving Loans Converted to Term	52,995		52,995		49,483
Total	4,711,294		4,711,294		4,620,001
2026/2025			0		0
2025/2024			0		0
2024/2023			0		(178)
2023/2022			0		0
2022/2021			(806)		0
Prior			(1,060)		(2,105)
Revolving Loans Amortized Cost Basis			0		0
Revolving Loans Converted to Term			0		0
Total			(1,866)		(2,283)
CRE [Member] \| Pass [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
2026/2025	302,180		302,180		360,858
2025/2024	366,113		366,113		483,504
2024/2023	453,376		453,376		436,790
2023/2022	408,916		408,916		627,582
2022/2021	619,133		619,133		577,221
Prior	1,800,135		1,800,135		1,362,602
Revolving Loans Amortized Cost Basis	353,987		353,987		329,111
Revolving Loans Converted to Term	44,074		44,074		49,483
Total	4,347,914		4,347,914		4,227,151
CRE [Member] \| Special Mention [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
2026/2025	0		0		5,509
2025/2024	2,950		2,950		7,351
2024/2023	7,021		7,021		22,545
2023/2022	28,612		28,612		50,020
2022/2021	55,777		55,777		15,226
Prior	67,831		67,831		62,542
Revolving Loans Amortized Cost Basis	7,964		7,964		7,053
Revolving Loans Converted to Term	8,678		8,678		0
Total	178,833		178,833		170,246
CRE [Member] \| Substandard [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
2026/2025	299		299		5,080
2025/2024	4,647		4,647		16,539
2024/2023	26,980		26,980		17,226
2023/2022	24,091		24,091		44,496
2022/2021	25,557		25,557		19,266
Prior	90,661		90,661		102,861
Revolving Loans Amortized Cost Basis	12,069		12,069		17,136
Revolving Loans Converted to Term	243		243		0
Total	184,547		184,547		222,604
Auto [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
2026/2025	406,060		406,060		563,852
2025/2024	462,182		462,182		372,552
2024/2023	294,685		294,685		200,590
2023/2022	149,875		149,875		133,093
2022/2021	92,040		92,040		40,411
Prior	25,214		25,214		6,867
Revolving Loans Amortized Cost Basis	0		0		0
Revolving Loans Converted to Term	0		0		0
Total	1,430,056		1,430,056		1,317,365
2026/2025			(1)		(263)
2025/2024			(542)		(1,526)
2024/2023			(649)		(1,320)
2023/2022			(582)		(1,494)
2022/2021			(539)		(609)
Prior			(199)		(262)
Revolving Loans Amortized Cost Basis			0		0
Revolving Loans Converted to Term			0		0
Total			(2,512)		(5,474)
Auto [Member] \| Performing [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
2026/2025	406,028		406,028		563,305
2025/2024	461,494		461,494		371,367
2024/2023	293,880		293,880		199,608
2023/2022	148,916		148,916		132,355
2022/2021	91,504		91,504		40,036
Prior	24,967		24,967		6,789
Revolving Loans Amortized Cost Basis	0		0		0
Revolving Loans Converted to Term	0		0		0
Total	1,426,789		1,426,789		1,313,460
Auto [Member] \| Nonperforming [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
2026/2025	32		32		547
2025/2024	688		688		1,185
2024/2023	805		805		982
2023/2022	959		959		738
2022/2021	536		536		375
Prior	247		247		78
Revolving Loans Amortized Cost Basis	0		0		0
Revolving Loans Converted to Term	0		0		0
Total	3,267		3,267		3,905
Residential Solar [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
2026/2025	904		904		1,978
2025/2024	1,878		1,878		2,200
2024/2023	2,091		2,091		108,587
2023/2022	102,839		102,839		366,390
2022/2021	346,963		346,963		151,141
Prior	238,502		238,502		106,674
Revolving Loans Amortized Cost Basis	0		0		0
Revolving Loans Converted to Term	0		0		0
Total	693,177		693,177		736,970
2026/2025			0		0
2025/2024			0		0
2024/2023			0		(1,012)
2023/2022			(381)		(5,153)
2022/2021			(2,867)		(1,619)
Prior			(1,312)		(844)
Revolving Loans Amortized Cost Basis			0		0
Revolving Loans Converted to Term			0		0
Total			(4,560)		(8,628)
Residential Solar [Member] \| Performing [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
2026/2025	904		904		1,978
2025/2024	1,878		1,878		2,200
2024/2023	2,091		2,091		108,529
2023/2022	102,747		102,747		365,629
2022/2021	346,409		346,409		150,757
Prior	238,159		238,159		106,546
Revolving Loans Amortized Cost Basis	0		0		0
Revolving Loans Converted to Term	0		0		0
Total	692,188		692,188		735,639
Residential Solar [Member] \| Nonperforming [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
2026/2025	0		0		0
2025/2024	0		0		0
2024/2023	0		0		58
2023/2022	92		92		761
2022/2021	554		554		384
Prior	343		343		128
Revolving Loans Amortized Cost Basis	0		0		0
Revolving Loans Converted to Term	0		0		0
Total	989		989		1,331
Other Consumer [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
2026/2025	12,794		12,794		16,080
2025/2024	9,726		9,726		7,363
2024/2023	5,072		5,072		3,283
2023/2022	2,213		2,213		4,502
2022/2021	2,538		2,538		11,824
Prior	17,362		17,362		13,762
Revolving Loans Amortized Cost Basis	26,915		26,915		26,010
Revolving Loans Converted to Term	64		64		69
Total	76,684		76,684		82,893
2026/2025			(325)		(815)
2025/2024			(379)		(404)
2024/2023			(85)		(95)
2023/2022			(51)		(941)
2022/2021			(140)		(1,940)
Prior			(730)		(1,195)
Revolving Loans Amortized Cost Basis			0		0
Revolving Loans Converted to Term			0		0
Total			(1,710)		(5,390)
Other Consumer [Member] \| Performing [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
2026/2025	12,794		12,794		16,080
2025/2024	9,685		9,685		7,334
2024/2023	5,054		5,054		3,257
2023/2022	2,197		2,197		4,465
2022/2021	2,481		2,481		11,689
Prior	17,215		17,215		13,636
Revolving Loans Amortized Cost Basis	26,911		26,911		25,995
Revolving Loans Converted to Term	25		25		35
Total	76,362		76,362		82,491
Other Consumer [Member] \| Nonperforming [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
2026/2025	0		0		0
2025/2024	41		41		29
2024/2023	18		18		26
2023/2022	16		16		37
2022/2021	57		57		135
Prior	147		147		126
Revolving Loans Amortized Cost Basis	4		4		15
Revolving Loans Converted to Term	39		39		34
Total	322		322		402
Residential [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
2026/2025	148,655		148,655		192,323
2025/2024	197,318		197,318		239,114
2024/2023	233,712		233,712		246,426
2023/2022	235,433		235,433		407,877
2022/2021	395,862		395,862		476,542
Prior	1,628,405		1,628,405		1,255,986
Revolving Loans Amortized Cost Basis	377,831		377,831		346,155
Revolving Loans Converted to Term	14,342		14,342		27,731
Total	3,231,558		3,231,558		3,192,154
2026/2025			0		0
2025/2024			0		(16)
2024/2023			(23)		(272)
2023/2022			0		(574)
2022/2021			0		0
Prior			(182)		(54)
Revolving Loans Amortized Cost Basis			0		0
Revolving Loans Converted to Term			0		0
Total	(193)	$ (61)	(205)	$ (118)	(916)
Residential [Member] \| Performing [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
2026/2025	148,655		148,655		192,323
2025/2024	197,230		197,230		237,485
2024/2023	232,276		232,276		244,007
2023/2022	233,051		233,051		404,751
2022/2021	392,812		392,812		473,304
Prior	1,615,444		1,615,444		1,242,708
Revolving Loans Amortized Cost Basis	377,831		377,831		346,079
Revolving Loans Converted to Term	14,088		14,088		27,566
Total	3,211,387		3,211,387		3,168,223
Residential [Member] \| Nonperforming [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
2026/2025	0		0		0
2025/2024	88		88		1,629
2024/2023	1,436		1,436		2,419
2023/2022	2,382		2,382		3,126
2022/2021	3,050		3,050		3,238
Prior	12,961		12,961		13,278
Revolving Loans Amortized Cost Basis	0		0		76
Revolving Loans Converted to Term	254		254		165
Total	$ 20,171		$ 20,171		$ 23,931

Document And Entity Information - shares	6 Months Ended
Document And Entity Information - shares	Jun. 30, 2026	Jul. 31, 2026
Document Information Line Items
Entity Central Index Key	0000790359
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2026
Document Fiscal Year Focus	2026
Document Transition Report	false
Entity File Number	0-14703
Entity Registrant Name	NBT BANCORP INC
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	16-1268674
Entity Address, Address Line One	52 South Broad Street
Entity Address, City or Town	Norwich
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	13815
City Area Code	607
Local Phone Number	337-2265
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	NBTB
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		51,960,061
Amendment Flag	false
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	--12-31

Securities - Amortized Cost, Estimated Fair Value and Unrealized Gains (Losses) of HTM Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Securities [Abstract]
Amortized Cost	$ 755,086	$ 762,756
Unrealized Gains	128	192
Unrealized Losses	(62,525)	(60,371)
Estimated Fair Value	692,689	702,577
Federal Agency [Member]
Securities [Abstract]
Amortized Cost	100,000	100,000
Unrealized Gains	0	0
Unrealized Losses	(11,268)	(10,705)
Estimated Fair Value	88,732	89,295
Mortgage-Backed, Government Sponsored Enterprises [Member]
Securities [Abstract]
Amortized Cost	179,456	188,942
Unrealized Gains	0	0
Unrealized Losses	(23,892)	(23,273)
Estimated Fair Value	155,564	165,669
Mortgage-Backed, U.S. Government Agency Securities [Member]
Securities [Abstract]
Amortized Cost	12,021	13,659
Unrealized Gains	0	1
Unrealized Losses	(176)	(106)
Estimated Fair Value	11,845	13,554
Collateralized Mortgage Obligations, Government-Sponsored Enterprises [Member]
Securities [Abstract]
Amortized Cost	127,009	136,464
Unrealized Gains	72	115
Unrealized Losses	(6,394)	(5,293)
Estimated Fair Value	120,687	131,286
Collateralized Mortgage Obligations, U.S. Government Agency Securities [Member]
Securities [Abstract]
Amortized Cost	55,640	57,309
Unrealized Gains	0	0
Unrealized Losses	(9,073)	(9,396)
Estimated Fair Value	46,567	47,913
State & Municipal [Member]
Securities [Abstract]
Amortized Cost	280,960	266,382
Unrealized Gains	56	76
Unrealized Losses	(11,722)	(11,598)
Estimated Fair Value	$ 269,294	$ 254,860

Consolidated Statements of Comprehensive Income (Loss) (unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Consolidated Statements of Comprehensive Income (Loss) (unaudited) [Abstract]
Net income	$ 53,030	$ 22,510	$ 104,172	$ 59,255
Securities available for sale:
Unrealized net holding (losses) gains arising during the period, gross	(2,510)	15,121	(8,892)	41,769
Tax effect	627	(3,781)	2,223	(10,443)
Unrealized net holding (losses) gains arising during the period, net	(1,883)	11,340	(6,669)	31,326
Amortization of unrealized net gains for the reclassification of available for sale securities to held to maturity, gross	55	70	113	145
Tax effect	(13)	(17)	(28)	(36)
Amortization of unrealized net gains for the reclassification of available for sale securities to held to maturity, net	42	53	85	109
Total securities available for sale, net	(1,841)	11,393	(6,584)	31,435
Pension and other benefits:
Amortization of prior service cost and actuarial losses, gross	32	307	64	631
Tax effect	(8)	(77)	(16)	(158)
Amortization of prior service cost and actuarial losses, net	24	230	48	473
Decrease in unrecognized actuarial loss, gross	0	936	0	936
Tax effect	0	(234)	0	(234)
Decrease in unrecognized actuarial loss, net	0	702	0	702
Total pension and other benefits, net	24	932	48	1,175
Total other comprehensive (loss) income	(1,817)	12,325	(6,536)	32,610
Comprehensive income	$ 51,213	$ 34,835	$ 97,636	$ 91,865

Loans (Tables)

6 Months Ended

Jun. 30, 2026

Loans [Abstract]

Loans, Net of Deferred Fees and Origination Costs

A summary of loans, net of deferred fees and origination costs, by category⁽¹⁾ is as follows:


(In thousands)	June 30, 2026		December 31, 2025
Commercial & industrial	$	1,755,123	$	1,671,974
Commercial real estate		4,893,543		4,798,957
Residential mortgage		2,558,338		2,537,593
Home equity		465,340		448,113
Indirect auto		1,450,482		1,340,524
Residential solar		693,177		736,970
Other consumer		58,078		63,983
Total loans	$	11,874,081	$	11,598,114

Derivative Instruments and Hedging Activities (Details) - Agreement	Jun. 30, 2026	Dec. 31, 2025
Derivatives Not Designated as Hedging Instruments [Member] \| Interest Rate Swaps [Member]
Derivative Instruments and Hedging Activities [Abstract]
Number of risk participation agreements held	24	22

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References + Details

Loans - Loans, Net of Deferred Fees and Origination Costs (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Loans [Abstract]
Loans	$ 11,874,081	$ 11,598,114
Commercial and Industrial [Member]
Loans [Abstract]
Loans	1,755,123	1,671,974
Commercial Real Estate [Member]
Loans [Abstract]
Loans	4,893,543	4,798,957
Residential Mortgage [Member]
Loans [Abstract]
Loans	2,558,338	2,537,593
Home Equity [Member]
Loans [Abstract]
Loans	465,340	448,113
Indirect Auto [Member]
Loans [Abstract]
Loans	1,450,482	1,340,524
Residential Solar [Member]
Loans [Abstract]
Loans	693,177	736,970
Other Consumer [Member]
Loans [Abstract]
Loans	$ 58,078	$ 63,983

- Definition

Amortized cost, before allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-3

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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-Name Accounting Standards Codification
-Section 50
-Paragraph 5
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Reference 3: http://www.xbrl.org/2003/role/exampleRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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-Section 50
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-14

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Regulation S-K (SK)
-Number 229
-Section 1404
-Paragraph a
-Publisher SEC

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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-SubTopic 210
-Name Accounting Standards Codification
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480657/210-10-S50-2

Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482736/825-10-45-1A

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 948
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-Name Accounting Standards Codification
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Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
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-Name Accounting Standards Codification
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-13

Reference 14: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 7A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-7A

Reference 15: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 29
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-29

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph a
-Subparagraph (1)
-Publisher SEC

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph a
-Subparagraph (2)
-Publisher SEC

Reference 18: http://www.xbrl.org/2003/role/exampleRef
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Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(3)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

Securities - Investment Securities with Unrealized Losses (Details) $ in Thousands	Jun. 30, 2026 USD ($) Position	Dec. 31, 2025 USD ($) Position
Securities [Abstract]
Less than 12 months, Fair value - AFS securities	$ 545,091	$ 130,234
Less than 12 months, Unrealized losses - AFS securities	$ (6,331)	$ (292)
Less than 12 months, Number of positions - AFS securities (in Position) \| Position	72	19
12 months or longer, Fair value - AFS securities	$ 1,092,702	$ 1,167,355
12 months or longer, Unrealized losses - AFS securities	$ (101,121)	$ (100,340)
12 months or longer, Number of positions - AFS securities (in Position) \| Position	312	331
Total, Fair value - AFS securities	$ 1,637,793	$ 1,297,679
Total, Unrealized losses - AFS securities	$ (107,452)	$ (100,632)
Total, Number of positions - AFS securities (in Position) \| Position	384	350
Less than 12 months, Fair value, - HTM securities	$ 32,016	$ 15,152
Less than 12 months, Unrealized losses - HTM securities	$ (729)	$ (316)
Less than 12 months, Number of positions - HTM securities (in Position) \| Position	23	8
12 months or longer, Fair value - HTM securities	$ 523,792	$ 573,189
12 months or longer, Unrealized losses - HTM securities	$ (61,796)	$ (60,055)
12 months or longer, Number of positions - HTM securities (in Position) \| Position	204	230
Total, Fair value - HTM securities	$ 555,808	$ 588,341
Total, Unrealized losses - HTM securities	$ (62,525)	$ (60,371)
Total, Number of positions - HTM securities (in Position) \| Position	227	238
U.S. Treasury [Member]
Securities [Abstract]
Less than 12 months, Fair value - AFS securities	$ 29,700	$ 0
Less than 12 months, Unrealized losses - AFS securities	$ (237)	$ 0
Less than 12 months, Number of positions - AFS securities (in Position) \| Position	3	0
12 months or longer, Fair value - AFS securities	$ 72,058	$ 71,796
12 months or longer, Unrealized losses - AFS securities	$ (2,427)	$ (2,533)
12 months or longer, Number of positions - AFS securities (in Position) \| Position	4	4
Total, Fair value - AFS securities	$ 101,758	$ 71,796
Total, Unrealized losses - AFS securities	$ (2,664)	$ (2,533)
Total, Number of positions - AFS securities (in Position) \| Position	7	4
Federal Agency [Member]
Securities [Abstract]
Less than 12 months, Fair value - AFS securities	$ 0	$ 0
Less than 12 months, Unrealized losses - AFS securities	$ 0	$ 0
Less than 12 months, Number of positions - AFS securities (in Position) \| Position	0	0
12 months or longer, Fair value - AFS securities	$ 231,129	$ 231,276
12 months or longer, Unrealized losses - AFS securities	$ (17,164)	$ (17,036)
12 months or longer, Number of positions - AFS securities (in Position) \| Position	16	16
Total, Fair value - AFS securities	$ 231,129	$ 231,276
Total, Unrealized losses - AFS securities	$ (17,164)	$ (17,036)
Total, Number of positions - AFS securities (in Position) \| Position	16	16
Less than 12 months, Fair value, - HTM securities	$ 0	$ 0
Less than 12 months, Unrealized losses - HTM securities	$ 0	$ 0
Less than 12 months, Number of positions - HTM securities (in Position) \| Position	0	0
12 months or longer, Fair value - HTM securities	$ 88,732	$ 89,295
12 months or longer, Unrealized losses - HTM securities	$ (11,268)	$ (10,705)
12 months or longer, Number of positions - HTM securities (in Position) \| Position	4	4
Total, Fair value - HTM securities	$ 88,732	$ 89,295
Total, Unrealized losses - HTM securities	$ (11,268)	$ (10,705)
Total, Number of positions - HTM securities (in Position) \| Position	4	4
State & Municipal [Member]
Securities [Abstract]
Less than 12 months, Fair value - AFS securities	$ 0	$ 0
Less than 12 months, Unrealized losses - AFS securities	$ 0	$ 0
Less than 12 months, Number of positions - AFS securities (in Position) \| Position	0	0
12 months or longer, Fair value - AFS securities	$ 80,364	$ 85,965
12 months or longer, Unrealized losses - AFS securities	$ (3,676)	$ (3,931)
12 months or longer, Number of positions - AFS securities (in Position) \| Position	59	64
Total, Fair value - AFS securities	$ 80,364	$ 85,965
Total, Unrealized losses - AFS securities	$ (3,676)	$ (3,931)
Total, Number of positions - AFS securities (in Position) \| Position	59	64
Less than 12 months, Fair value, - HTM securities	$ 16,562	$ 4,381
Less than 12 months, Unrealized losses - HTM securities	$ (514)	$ (245)
Less than 12 months, Number of positions - HTM securities (in Position) \| Position	19	7
12 months or longer, Fair value - HTM securities	$ 120,834	$ 142,139
12 months or longer, Unrealized losses - HTM securities	$ (11,208)	$ (11,353)
12 months or longer, Number of positions - HTM securities (in Position) \| Position	121	146
Total, Fair value - HTM securities	$ 137,396	$ 146,520
Total, Unrealized losses - HTM securities	$ (11,722)	$ (11,598)
Total, Number of positions - HTM securities (in Position) \| Position	140	153
Mortgage-Backed [Member]
Securities [Abstract]
Less than 12 months, Fair value - AFS securities	$ 317,746	$ 49,453
Less than 12 months, Unrealized losses - AFS securities	$ (3,411)	$ (161)
Less than 12 months, Number of positions - AFS securities (in Position) \| Position	41	7
12 months or longer, Fair value - AFS securities	$ 311,311	$ 338,370
12 months or longer, Unrealized losses - AFS securities	$ (27,735)	$ (27,030)
12 months or longer, Number of positions - AFS securities (in Position) \| Position	126	135
Total, Fair value - AFS securities	$ 629,057	$ 387,913
Total, Unrealized losses - AFS securities	$ (31,146)	$ (27,191)
Total, Number of positions - AFS securities (in Position) \| Position	167	142
Less than 12 months, Fair value, - HTM securities	$ 9,878	$ 10,771
Less than 12 months, Unrealized losses - HTM securities	$ (143)	$ (71)
Less than 12 months, Number of positions - HTM securities (in Position) \| Position	3	1
12 months or longer, Fair value - HTM securities	$ 157,509	$ 168,422
12 months or longer, Unrealized losses - HTM securities	$ (23,925)	$ (23,308)
12 months or longer, Number of positions - HTM securities (in Position) \| Position	33	33
Total, Fair value - HTM securities	$ 167,387	$ 179,193
Total, Unrealized losses - HTM securities	$ (24,068)	$ (23,379)
Total, Number of positions - HTM securities (in Position) \| Position	36	34
Collateralized Mortgage Obligations [Member]
Securities [Abstract]
Less than 12 months, Fair value - AFS securities	$ 197,645	$ 80,781
Less than 12 months, Unrealized losses - AFS securities	$ (2,683)	$ (131)
Less than 12 months, Number of positions - AFS securities (in Position) \| Position	28	12
12 months or longer, Fair value - AFS securities	$ 376,126	$ 418,983
12 months or longer, Unrealized losses - AFS securities	$ (49,333)	$ (48,275)
12 months or longer, Number of positions - AFS securities (in Position) \| Position	100	105
Total, Fair value - AFS securities	$ 573,771	$ 499,764
Total, Unrealized losses - AFS securities	$ (52,016)	$ (48,406)
Total, Number of positions - AFS securities (in Position) \| Position	128	117
Less than 12 months, Fair value, - HTM securities	$ 5,576	$ 0
Less than 12 months, Unrealized losses - HTM securities	$ (72)	$ 0
Less than 12 months, Number of positions - HTM securities (in Position) \| Position	1	0
12 months or longer, Fair value - HTM securities	$ 156,717	$ 173,333
12 months or longer, Unrealized losses - HTM securities	$ (15,395)	$ (14,689)
12 months or longer, Number of positions - HTM securities (in Position) \| Position	46	47
Total, Fair value - HTM securities	$ 162,293	$ 173,333
Total, Unrealized losses - HTM securities	$ (15,467)	$ (14,689)
Total, Number of positions - HTM securities (in Position) \| Position	47	47
Corporate [Member]
Securities [Abstract]
Less than 12 months, Fair value - AFS securities	$ 0	$ 0
Less than 12 months, Unrealized losses - AFS securities	$ 0	$ 0
Less than 12 months, Number of positions - AFS securities (in Position) \| Position	0	0
12 months or longer, Fair value - AFS securities	$ 21,714	$ 20,965
12 months or longer, Unrealized losses - AFS securities	$ (786)	$ (1,535)
12 months or longer, Number of positions - AFS securities (in Position) \| Position	7	7
Total, Fair value - AFS securities	$ 21,714	$ 20,965
Total, Unrealized losses - AFS securities	$ (786)	$ (1,535)
Total, Number of positions - AFS securities (in Position) \| Position	7	7

Earnings Per Share (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
Earnings Per Share (Details) - shares shares in Thousands	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Restricted Stock [Member]
Earnings Per Share [Abstract]
Anti-dilutive securities	0	23	0	0

Earnings Per Share - Reconciliation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Basic EPS:
Weighted average common shares outstanding (in Shares)	51,981	50,575	52,052	48,919
Net income available to common stockholders (in Dollars)	$ 53,030	$ 22,510	$ 104,172	$ 59,255
Basic EPS (in Dollars per share)	$ 1.02	$ 0.45	$ 2	$ 1.21
Diluted EPS:
Weighted average common shares outstanding (in Shares)	51,981	50,575	52,052	48,919
Dilutive effect of common stock options and restricted stock (in Shares)	258	212	238	224
Weighted average common shares and common share equivalents (in Shares)	52,239	50,787	52,290	49,143
Net income available to common stockholders (in Dollars)	$ 53,030	$ 22,510	$ 104,172	$ 59,255
Diluted EPS (in Dollars per share)	$ 1.02	$ 0.44	$ 1.99	$ 1.21

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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+ Details

Acquisitions

6 Months Ended

Jun. 30, 2026

Acquisitions [Abstract]

Acquisitions

4. Acquisitions

Evans Bancorp, Inc.

On May 2, 2025, the Company completed the acquisition of Evans Bancorp, Inc. (“Evans”) through the merger of Evans with and into the Company, with the Company surviving the merger. Total consideration for the acquisition was $221.8 million in common stock. Evans, with assets of $2.19 billion at December 31, 2024, was headquartered in Williamsville, New York. Its primary subsidiary, Evans Bank, National Association (“Evans Bank”), was a federally-chartered national banking association operating 18 banking locations in Western New York. The acquisition enhances the Company’s presence in Western New York, including the Buffalo and Rochester communities. In connection with the acquisition, the Company issued 5.1 million shares of common stock and acquired approximately $131.2 million of identifiable net assets. Preliminary goodwill of $91.4 million was recognized as a result of the merger and is not amortizable or deductible for tax purposes. During the fourth quarter of 2025, the Company revised the accrued income taxes and deferred taxes associated with the Evans acquisition, which resulted in a $0.8 million decrease in goodwill. Total goodwill of $90.6 million was recognized as a result of the merger. The effects of the acquired assets and liabilities have been included in the consolidated financial statements since May 2, 2025. As a result of the full integration of the operations of Evans, it is not practicable to determine all revenue or net income included in the Company’s operating results relating to Evans since the date of acquisition as Evans results cannot be separately identified.

The acquisition of Evans is being accounted for as a business combination in accordance with Accounting Standards Codification (“ASC”) 805, “Business Combinations” (“ASC 805”), using the acquisition method of accounting. Accordingly, as of the date of the acquisition, the Company recorded the assets acquired, liabilities assumed and consideration paid at fair value based on management’s best estimates using information available at the date of the acquisition. These estimates were subject to adjustment based on updated information not available at the time of the acquisition and all amounts have now been finalized. The amount of goodwill arising from the acquisition consists largely of the synergies and economies of scale expected from combining the operations of the Company with Evans.

The following table summarizes the estimated fair value of the assets acquired and liabilities assumed:


	May 2, 2025
(In thousands)	Evans Bancorp, Inc.
Consideration:
Cash paid to shareholders (fractional shares)	$	25
Common stock issuance		221,767
Total net consideration	$	221,792

Recognized amounts of identifiable assets acquired and (liabilities) assumed:
Cash and cash equivalents	$	40,197
Securities available for sale		255,487
Securities held to maturity		3,494
Loans, net of allowance for credit losses on purchased credit deteriorated loans		1,665,712
Premises and equipment, net		15,069
Core deposit intangibles		33,240
Bank owned life insurance		44,100
Other assets		71,131
Total identifiable assets acquired	$	2,128,430

Deposits	$	(1,864,049	)
Borrowings		(113,712	)
Other liabilities		(19,492	)
Total liabilities assumed	$	(1,997,253	)

Total identifiable assets, net	$	131,177

Goodwill	$	90,615

The following is a description of the valuation methodologies used to estimate the fair values of major categories of assets acquired and liabilities assumed. The Company used an independent valuation specialist to assist with the determination of fair values for certain acquired assets and assumed liabilities.

Cash and due from banks - The estimated fair value was determined to approximate the carrying amount of these assets.

Securities available for sale (“AFS”) - The estimated fair value of the AFS investment portfolio was primarily determined using quoted market prices and dealer quotes. The investment securities were sold immediately after the merger and no gains or losses were recorded.

Securities held to maturity (“HTM”) - The estimated fair value of the HTM investment portfolio, which consisted of local municipal securities, was retained at par, which is estimated to be equal to fair value.

Loans - The estimated fair value of loans were based on a discounted cash flow methodology applied on a pooled basis. Loans were first segmented by purchased credit deteriorated (“PCD”) or non-purchased credit deteriorated (“non-PCD”) status, and then further grouped according to Federal Deposit Insurance Corporation (“FDIC”) call report segmentation. The valuation considered key loan characteristics including loan type, term, rate, payment schedule and loan performance attributes. Certain key assumptions related to prepayment speeds, probability of default (“PD”), loss given default (“LGD”) and discount rate were also considered. The discount rates applied were based on a build-up approach factoring in the funding mix, servicing costs, liquidity premium and factors related to performance risk.

Core deposit intangible - The core deposit intangible was valued utilizing the cost savings method approach, which recognizes the cost savings represented by the expense of maintaining the core deposit base versus the cost of an alternative funding source. The valuation incorporated assumptions related to account retention, discount rates, deposit interest rates, deposit maintenance costs and alternative funding rates.

Deposits - The fair value of noninterest bearing demand deposits, interest-bearing checking, money market and savings deposit accounts were assumed to approximate the carrying value as these accounts have no stated maturity and are payable on demand. Certificate of deposit (“CD”) (time deposit accounts) were valued at the present value of the certificates’ expected contractual payments discounted at market rates for similar certificates which approximates carrying value.

Borrowings - The estimated fair value of short-term borrowings was determined to approximate stated value. Long-term debt, subordinated debt and junior subordinated debt were valued using a discounted cash flow approach incorporating a discount rate that incorporated similar terms, maturity and credit rating.

Accounting for Acquired Loans - Acquired loans are classified into two categories: PCD loans and non-PCD loans. PCD loans are defined as a loan or group of loans that have experienced more than insignificant credit deterioration since origination. Non-PCD loans had an allowance established on acquisition date, which is recognized as an expense through the provision for credit losses. For PCD loans, an allowance is recognized by adding it to the fair value of the loan, which is the amortized cost. There is no provision for credit loss expense recognized on PCD loans because the initial allowance is established by grossing-up the amortized cost of the PCD loan. The allowance for credit losses on non-PCD loans of $13.0 million was recorded through the provision for loan losses within the unaudited interim consolidated statements of income. The following table provides details related to the fair value of acquired PCD loans.


(In thousands)	PCD Loans
Par value of PCD loans at acquisition	$	336,398
Allowance for credit losses at acquisition		7,726
Discount at acquisition		(36,584	)
Fair value of PCD loans at acquisition	$	307,540

The non-PCD loans acquired from Evans had an acquisition date fair value of $1.37 billion, compared to $1.43 billion in gross contractual amounts receivable. At the acquisition date, the Company estimated that $13.0 million of the contractual cash flows were not expected to be collected.

Direct costs related to the acquisition were expensed as incurred. Acquisition integration-related expenses were $17.2 million and $18.4 million during the three and six months ended June 30, 2025, respectively. These amounts have been separately stated in the unaudited interim consolidated statements of income and are included in operating activities in the unaudited interim consolidated statements of cash flow.

Supplemental Pro Forma Financial Information (Unaudited)

The following table presents certain unaudited pro forma financial information for illustrative purposes only, for the three and six months ended June 30, 2025, as if Evans had been acquired on January 1, 2025. This unaudited pro forma information combines the historical results of Evans with the Company’s consolidated historical results and includes certain adjustments reflecting the estimated impact of certain fair value adjustments for the respective periods. The pro forma information is not indicative of what would have occurred had the acquisition taken place at the beginning of the year prior to the acquisition. The unaudited pro forma information does not consider any changes to the provision expense resulting from recording loan assets at fair value, cost savings or business synergies. As a result, actual amounts would have differed from the unaudited pro forma information presented and the differences could be significant.

	Pro Forma (Unaudited)
		Three Months Ended		Six Months Ended
(In thousands)		June 30, 2025		June 30, 2025
Total revenue, net of interest expense		$	177,453	$	349,366
Net income			12,930		52,859

- Definition

The entire disclosure for business combination.

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+ Details

Borrowings (Details) - Subordinated Notes Issued March 2021 [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Jun. 30, 2026
Borrowings [Abstract]
Subordinated notes assumed (in Dollars)	$ 25,000	$ 0
Debt instrument, rate on fixed portion	3.50%
Term of variable rate basis	3 months
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]	us-gaap:SecuredOvernightFinancingRateSofrMember
Basis spread on variable rate	2.80%

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Securities - Contractual Maturities of Debt Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
AFS debt securities:
Amortized Cost, Within one year	$ 79,941
Estimated Fair Value, Within one year	78,871
Amortized Cost, From one to five years	688,941
Estimated Fair Value, From one to five years	656,741
Amortized Cost, From five to ten years	303,675
Estimated Fair Value, From five to ten years	284,892
Amortized Cost, After ten years	1,038,361
Estimated Fair Value, After ten years	985,702
Amortized Cost	2,110,918	$ 1,958,658
Estimated Fair Value	2,006,206	1,862,838
HTM debt securities:
Amortized Cost, Within one year	122,217
Estimated Fair Value, Within one year	122,161
Amortized Cost, From one to five years	222,517
Estimated Fair Value, From one to five years	206,822
Amortized Cost, From five to ten years	93,543
Estimated Fair Value, From five to ten years	85,389
Amortized Cost, After ten years	316,809
Estimated Fair Value, After ten years	278,317
Amortized Cost	755,086	762,756
Estimated Fair Value	$ 692,689	$ 702,577

Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025
Operating activities
Net income	$ 104,172	$ 59,255
Adjustments to reconcile net income to net cash provided by operating activities
Provision for loan losses	11,713	25,389
Depreciation and amortization of premises and equipment	6,953	6,193
Net amortization on securities	215	917
Amortization of intangible assets	6,539	5,153
Amortization of operating lease right-of-use assets	4,578	4,088
Excess tax benefit on stock-based compensation	(201)	(419)
Stock-based compensation expense	4,240	3,047
Bank owned life insurance income	(5,164)	(5,577)
Amortization of subordinated debt issuance costs	0	199
Proceeds from sale of loans held for sale	2,989	173,409
Originations of loans held for sale	(1,802)	(167,816)
Net gains on sale of loans held for sale	(79)	(313)
Net securities (gains)	(617)	(8)
Net gains on sale of other real estate owned	(99)	(83)
Net change in other assets and other liabilities	(18,511)	(14,952)
Net cash provided by operating activities	114,926	88,482
Investing activities
Net cash (used in) provided by acquisitions	(488)	38,597
Securities available for sale:
Proceeds from maturities, calls and principal paydowns	143,690	90,172
Proceeds from sales	0	254,468
Purchases	(295,464)	(202,260)
Securities held to maturity:
Proceeds from maturities, calls and principal paydowns	80,423	81,258
Purchases	(73,341)	(45,167)
Equity securities:
Proceeds from sales	0	491
Other:
Net (increase) in loans	(285,090)	(483)
Proceeds from Federal Reserve and Federal Home Loan Bank stock redemption	11,507	30,216
Purchases of Federal Reserve and Federal Home Loan Bank stock	(18,472)	(26,991)
Proceeds from settlement of bank owned life insurance	8,091	4,330
Purchases of premises and equipment, net	(5,783)	(6,031)
Proceeds from sales of other real estate owned	411	135
Net cash (used in) provided by investing activities	(434,516)	218,735
Financing activities
Net increase in deposits	38,109	104,422
Net increase (decrease) in short-term borrowings	168,369	(92,972)
Redemption of subordinated debt	(25,000)	0
Repayments of long-term debt	(55)	(25,078)
Cash paid by employer for tax-withholding on stock issuance	(1,803)	(2,207)
Purchase of treasury stock	(14,030)	0
Cash dividends	(38,463)	(33,875)
Net cash provided by (used in) financing activities	127,127	(49,710)
Net (decrease) increase in cash and cash equivalents	(192,463)	257,507
Cash and cash equivalents at beginning of period	487,116	284,056
Cash and cash equivalents at end of period	294,653	541,563
Cash paid during the period for:
Interest expense	100,357	99,802
Income taxes paid, net of refund	19,959	16,325
Noncash investing activities:
Loans transferred to other real estate owned	0	215
Acquisitions:
Fair value of assets acquired, excluding acquired cash and goodwill	0	2,087,439
Fair value of liabilities assumed	0	1,997,253
Common stock issued	$ 0	$ 221,767

Earnings Per Share

6 Months Ended

Jun. 30, 2026

Earnings Per Share [Abstract]

Earnings Per Share

10. Earnings Per Share

Basic earnings per share (“EPS”) excludes dilution and is computed by dividing income available to common stockholders by the weighted average number of common shares outstanding for the period. Diluted EPS reflects the potential dilution that could occur if securities or other contracts to issue common stock were exercised or converted into common stock or resulted in the issuance of common stock that then shared in the earnings of the entity (such as the Company’s dilutive restricted stock units).

The following is a reconciliation of basic and diluted EPS for the periods presented in the unaudited interim consolidated statements of income:


	Three Months Ended
	June 30,
(In thousands)		2026		2025
Basic EPS:
Weighted average common shares outstanding			51,981		50,575
Net income available to common stockholders		$	53,030	$	22,510
Basic EPS		$	1.02	$	0.45
Diluted EPS:
Weighted average common shares outstanding			51,981		50,575
Dilutive effect of common stock options and restricted stock			258		212
Weighted average common shares and common share equivalents			52,239		50,787
Net income available to common stockholders		$	53,030	$	22,510
Diluted EPS		$	1.02	$	0.44


	Six Months Ended
		June 30,
(In thousands)		2026		2025
Basic EPS:
Weighted average common shares outstanding			52,052		48,919
Net income available to common stockholders		$	104,172	$	59,255
Basic EPS		$	2.00	$	1.21
Diluted EPS:
Weighted average common shares outstanding			52,052		48,919
Dilutive effect of common stock options and restricted stock			238		224
Weighted average common shares and common share equivalents			52,290		49,143
Net income available to common stockholders		$	104,172	$	59,255
Diluted EPS		$	1.99	$	1.21

There were twenty-three thousand shares of anti-dilutive restricted stock outstanding for the three months ended June 30, 2025 that were not considered in the calculation of diluted EPS. There were no shares of anti-dilutive restricted stock outstanding for the three and six months ended June 30, 2026 and the six months ended June 30, 2025.

Segment Reporting (Tables)

6 Months Ended

Jun. 30, 2026

Segment Reporting [Abstract]

Information about Reportable Segments

Information about reportable segments and reconciliation of the information to the consolidated financial statements follows:


	Three Months Ended June 30, 2026
(In thousands)		Banking		Retirement Plan Administration				All Other(1)			Consolidated
Net interest income		$	136,944	$	19		$	-		$	136,963
Provision for loan losses			6,136		-			-			6,136
Net interest income after provision for loan losses		$	130,808	$	19		$	-		$	130,827
Noninterest income
Service charges on deposit accounts		$	5,194	$	-		$	-		$	5,194
Card services income			6,613		-			-			6,613
Retirement plan administration fees			-		17,347			(419	)		16,928
Wealth management			10,345		600			3			10,948
Insurance services			-		-			4,177			4,177
Bank owned life insurance income			2,505		-			-			2,505
Net securities gains			175		-			-			175
Other			4,643		155			(1,611	)		3,187
Total noninterest income		$	29,475	$	18,102		$	2,150		$	49,727
Noninterest expense
Salaries and employee benefits		$	56,941	$	9,240		$	2,823		$	69,004
Technology and data services			11,411		270			169			11,850
Occupancy			9,183		224			68			9,475
Professional fees and outside services			5,380		687			(405	)		5,662
Office supplies and postage			1,961		78			21			2,060
FDIC assessment			1,984		-			-			1,984
Marketing			972		(41	)		6			937
Amortization of intangible assets			2,729		408			54			3,191
Loan collection and other real estate owned, net			544		-			-			544
Acquisition expenses			-		-			-			-
Other			8,078		280			(1,627	)		6,731
Total noninterest expense		$	99,183	$	11,146		$	1,109		$	111,438
Income before income tax expense		$	61,100	$	6,975		$	1,041		$	69,116
Income tax expense			14,604		1,482			-			16,086
Net income		$	46,496	$	5,493		$	1,041		$	53,030
Goodwill		$	414,865	$	23,877		$	14,536		$	453,278
Intangible assets, net			45,465		4,711			941			51,117
Total assets			18,192,349		47,189			(2,024,581	)		16,214,957

(1)

Included in All Other is the revenue and expenses from certain other non-bank subsidiaries of the parent, including the insurance subsidiary, along with eliminating amounts that do not meet the definition of an operating segment.


	Three Months Ended June 30, 2025
				Retirement
				Plan
(In thousands)		Banking		Administration		All Other(1)			Consolidated
Net interest income		$	124,202	$	18	$	-		$	124,220
Provision for loan losses			17,835		-		-			17,835
Net interest income after provision for loan losses		$	106,367	$	18	$	-		$	106,385
Noninterest income
Service charges on deposit accounts		$	4,578	$	-	$	-		$	4,578
Card services income			6,077		-		-			6,077
Retirement plan administration fees			-		16,081		(371	)		15,710
Wealth management			10,153		517		8			10,678
Insurance services			1		-		4,096			4,097
Bank owned life insurance income			2,180		-		-			2,180
Net securities gains			112		-		-			112
Other			5,018		145		(1,663	)		3,500
Total noninterest income		$	28,119	$	16,743	$	2,070		$	46,932
Noninterest expense
Salaries and employee benefits		$	52,659	$	8,700	$	2,796		$	64,155
Technology and data services			10,341		303		160			10,804
Occupancy			8,687		284		67			9,038
Professional fees and outside services			4,851		521		(351	)		5,021
Office supplies and postage			1,783		73		15			1,871
FDIC assessment			1,820		-		-			1,820
Marketing			952		21		1			974
Amortization of intangible assets			2,500		485		57			3,042
Loan collection and other real estate owned, net			489		-		-			489
Acquisition expenses			17,180		-		-			17,180
Other			9,684		274		(1,742	)		8,216
Total noninterest expense		$	110,946	$	10,661	$	1,003		$	122,610
Income before income tax expense		$	23,540	$	6,100	$	1,067		$	30,707
Income tax expense			6,917		1,280		-			8,197
Net income		$	16,623	$	4,820	$	1,067		$	22,510
Goodwill		$	415,659	$	23,877	$	14,536		$	454,072
Intangible assets, net			56,785		6,504		1,158			64,447
Total assets			18,013,397		48,642		(2,047,258	)		16,014,781

(1)


	Six Months Ended June 30, 2026
				Retirement
				Plan
(In thousands)		Banking		Administration			All Other (1)			Consolidated
Net interest income		$	271,275	$	36		$	-		$	271,311
Provision for loan losses			11,713		-			-			11,713
Net interest income after provision for loan losses		$	259,562	$	36		$	-		$	259,598
Noninterest income
Service charges on deposit accounts		$	10,462	$	-		$	-		$	10,462
Card services income			12,641		-			-			12,641
Retirement plan administration fees			-		34,319			(825	)		33,494
Wealth management			20,880		1,196			6			22,082
Insurance services			-		-			8,659			8,659
Bank owned life insurance income			5,164		-			-			5,164
Net securities gains			617		-			-			617
Other			11,105		306			(4,667	)		6,744
Total noninterest income		$	60,869	$	35,821		$	3,173		$	99,863
Noninterest expense
Salaries and employee benefits		$	113,800	$	18,131		$	5,832		$	137,763
Technology and data services			22,526		488			346			23,360
Occupancy			19,878		469			138			20,485
Professional fees and outside services			10,648		1,349			(781	)		11,216
Office supplies and postage			4,002		182			43			4,227
FDIC assessment			3,994		-			-			3,994
Marketing			1,864		(18	)		9			1,855
Amortization of intangible assets			5,574		857			108			6,539
Loan collection and other real estate owned, net			1,154		-			-			1,154
Acquisition expenses			-		-			-			-
Other			16,985		581			(4,489	)		13,077
Total noninterest expense		$	200,425	$	22,039		$	1,206		$	223,670
Income before income tax expense		$	120,006	$	13,818		$	1,967		$	135,791
Income tax expense			28,623		2,996			-			31,619
Net income		$	91,383	$	10,822		$	1,967		$	104,172
Goodwill		$	414,865	$	23,877		$	14,536		$	453,278
Intangible assets, net			45,465		4,711			941			51,117
Total assets			18,192,349		47,189			(2,024,581	)		16,214,957

(1)


	Six Months Ended June 30, 2025
					Retirement
					Plan
(In thousands)		Banking			Administration		All Other(1)			Consolidated
Net interest income		$	231,407	$	36	$	-		$	231,443
Provision for loan losses			25,389		-		-			25,389
Net interest income after provision for loan losses		$	206,018	$	36	$	-		$	206,054
Noninterest income
Service charges on deposit accounts		$	8,821	$	-	$	-		$	8,821
Card services income			11,394		-		-			11,394
Retirement plan administration fees			-		32,337		(769	)		31,568
Wealth management			20,490		1,115		19			21,624
Insurance services			1		-		8,857			8,858
Bank owned life insurance income			5,577		-		-			5,577
Net securities gains			8		-		-			8
Other			10,631		300		(4,397	)		6,534
Total noninterest income		$	56,922	$	33,752	$	3,710		$	94,384
Noninterest expense
Salaries and employee benefits		$	102,207	$	17,154	$	5,488		$	124,849
Technology and data services			20,142		573		327			21,042
Occupancy			17,379		552		134			18,065
Professional fees and outside services			9,666		1,025		(718	)		9,973
Office supplies and postage			3,664		120		29			3,813
FDIC assessment			3,514		-		-			3,514
Marketing			2,070		40		2			2,112
Amortization of intangible assets			4,008		1,029		116			5,153
Loan collection and other real estate owned, net			1,148		-		-			1,148
Acquisition expenses			18,401		-		-			18,401
Other			18,224		508		(4,292	)		14,440
Total noninterest expense		$	200,423	$	21,001	$	1,086		$	222,510
Income before income tax expense		$	62,517	$	12,787	$	2,624		$	77,928
Income tax expense			15,968		2,705		-			18,673
Net income		$	46,549	$	10,082	$	2,624		$	59,255
Goodwill		$	415,659	$	23,877	$	14,536		$	454,072
Intangible assets, net			56,785		6,504		1,158			64,447
Total assets			18,013,397		48,642		(2,047,258	)		16,014,781

(1)

- Definition

Tabular disclosure of segment reporting. Includes, but is not limited to, reconciliation of reportable segment amount to corresponding consolidated total.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 31
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-31

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 34
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-34

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-32

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
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-SubTopic 10
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-Paragraph 30
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-30

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
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-Paragraph 26C
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-26C

Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
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-Name Accounting Standards Codification
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-26B

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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-25

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-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Publisher FASB
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Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 15
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-15

+ Details

Allowance for Credit Losses and Credit Quality of Loans - Financial Effect of Modifications Made to Borrowers Experiencing Financial Difficulty (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Auto [Member] \| Term Extension [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Period of increase in weighted-average maturity	1 year 9 months 18 days		1 year 9 months 18 days
Residential [Member] \| Term Extension [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Period of increase in weighted-average maturity	8 years	9 years 9 months 18 days	5 years 4 months 24 days	7 years 6 months
Residential [Member] \| Interest Rate Reduction [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Decrease in weighted average contractual interest rate		0.62%		0.62%

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph c
-Publisher SEC

+ Details

Allowance for Credit Losses and Credit Quality of Loans - Allowance for Loan Losses by Portfolio (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Activity in allowance for credit losses by portfolio segment [Roll Forward]
Balance, beginning of period	$ 138,600	$ 117,000	$ 138,000	$ 116,000	$ 116,000
Allowance for credit loss on PCD acquired loans		7,726		7,726
Charge-offs	(5,996)	(4,431)	(12,852)	(12,586)	(25,209)
Recoveries	1,760	2,070	3,639	3,671
Provision	6,136	17,835	11,713	25,389
Balance, end of period	140,500	140,200	140,500	140,200	138,000
Commercial Loans [Member]
Activity in allowance for credit losses by portfolio segment [Roll Forward]
Balance, beginning of period	63,096	48,730	61,725	45,453	45,453
Allowance for credit loss on PCD acquired loans		7,355		7,355
Charge-offs	(1,379)	(533)	(3,865)	(2,755)
Recoveries	107	409	304	516
Provision	2,738	10,060	6,398	15,452
Balance, end of period	64,562	66,021	64,562	66,021	61,725
Consumer Loans [Member]
Activity in allowance for credit losses by portfolio segment [Roll Forward]
Balance, beginning of period	44,047	41,696	42,583	43,987	43,987
Allowance for credit loss on PCD acquired loans		0		0
Charge-offs	(4,424)	(3,837)	(8,782)	(9,713)
Recoveries	1,478	1,566	3,049	2,972
Provision	2,706	1,444	6,957	3,623
Balance, end of period	43,807	40,869	43,807	40,869	42,583
Residential [Member]
Activity in allowance for credit losses by portfolio segment [Roll Forward]
Balance, beginning of period	31,457	26,574	33,692	26,560	26,560
Allowance for credit loss on PCD acquired loans		371		371
Charge-offs	(193)	(61)	(205)	(118)	(916)
Recoveries	175	95	286	183
Provision	692	6,331	(1,642)	6,314
Balance, end of period	$ 32,131	$ 33,310	$ 32,131	$ 33,310	$ 33,692

- Definition

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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-Paragraph 13
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Reference 7: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
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-Section 1405
-Paragraph c
-Publisher SEC

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph a
-Subparagraph (1)
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
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-Publisher SEC

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
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-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

+ Details

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

Derivative Instruments and Hedging Activities - Summary of Derivatives Outstanding (Details) - Derivatives Not Designated as Hedging Instruments [Member] - USD ($)
$ in Thousands

Jun. 30, 2026

Dec. 31, 2025

Derivative Instruments and Hedging Activities [Abstract]

Derivatives asset, fair value

$ 72,170

$ 68,114

Derivatives liability, fair value

72,053

68,066

Derivative asset, netting adjustments, fair value

^[1]

17,471

16,010

Derivative liability, netting adjustments, fair value

^[1]

Derivative asset, net derivatives in the balance sheet, fair value

54,699

52,104

Derivative liability, net derivatives in the balance sheet, fair value

72,053

68,066

Derivative asset, derivatives not offset on the balance sheet, fair value

1,957

5,722

Derivative liability, derivatives not offset on the balance sheet, fair value

1,957

5,722

Derivative asset, cash collateral, fair value

^[2]

Derivative liability, cash collateral, fair value

^[2]

Derivative asset, net derivative amounts, fair value

52,742

46,382

Derivative liability, net derivative amounts, fair value

70,096

62,344

Interest Rate Swaps [Member] | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssets

Derivative Instruments and Hedging Activities [Abstract]

Derivatives asset, notional amount

1,279,476

1,332,295

Derivatives asset, fair value

72,126

68,061

Interest Rate Swaps [Member] | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherLiabilities

Derivative Instruments and Hedging Activities [Abstract]

Derivative liabilitys, notional amount

1,279,476

1,332,295

Derivatives liability, fair value

72,037

68,050

Risk Participation Agreements [Member] | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssets

Derivative Instruments and Hedging Activities [Abstract]

Derivatives asset, notional amount

96,259

97,319

Derivatives asset, fair value

Risk Participation Agreements [Member] | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherLiabilities

Derivative Instruments and Hedging Activities [Abstract]

Derivative liabilitys, notional amount

37,673

15,791

Derivatives liability, fair value

$ 16

[1]

Netting adjustments represent the amounts recorded to convert derivative assets and liabilities from a gross basis to a net basis in accordance with the applicable accounting guidance on the settle to market rules for cleared derivatives. The CME legally characterizes the variation margin posted between counterparties as settlements of the outstanding derivative contracts instead of cash collateral.

[2]

Cash collateral represents the amount that cannot be used to offset our derivative assets and liabilities from a gross basis to a net basis in accordance with the applicable accounting guidance. The other collateral consists of securities and is exchanged under bilateral collateral and master netting agreements that allow us to offset the net derivative position with the related collateral. The application of the other collateral cannot reduce the net derivative position below zero. Therefore, excess other collateral, if any, is not reflected above.

Securities (Details) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
Securities (Details) $ in Thousands	Jun. 30, 2026 USD ($) Issuer Position	Jun. 30, 2025 USD ($)	Jun. 30, 2026 USD ($) Issuer Position	Jun. 30, 2025 USD ($)	Dec. 31, 2025 USD ($) Issuer Position
Securities [Abstract]
Allowance for credit losses on AFS securities	$ 0		$ 0		$ 0
Gross realized gains	0	$ 0	0	$ 0
Gross realized losses	0	0	0	0
Gains from calls on HTM securities	0	0	0	0
Carrying amount of equity securities without readily determinable fair values	1,000		1,000		$ 1,000
Impairment adjustments of equity securities without readily determinable fair values	0	0	0	0
Downward adjustments of equity securities without readily determinable fair values	0	0	0	0
Upward adjustments of equity securities without readily determinable fair values	$ 0	$ 0	$ 0	$ 0
Number of issuers whose holdings exceeded 10% of consolidated stockholders' equity, excluding U.S. Government securities and Government-sponsored enterprises securities (in Issuer) \| Issuer	0		0		0
Unrealized loss positions (in Position) \| Position	384		384		350
AIR on AFS debt securities	$ 6,500		$ 6,500		$ 5,600
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Other assets		Other assets		Other assets
HTM debt securities, nonaccrual	$ 0		$ 0		$ 0
Accrued interest reversed against interest income	0		0		0
Collateral-dependent HTM debt securities	0		0		0
Allowance for credit losses on HTM securities	0		0		0
AIR on HTM debt securities	$ 4,000		$ 4,000		$ 3,900
Debt Securities, Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Other assets		Other assets		Other assets
US Government Agencies Debt Securities and US Government-sponsored Enterprises Debt Securities [Member]
Securities [Abstract]
Held-to-maturity debt securities, percentage	63.00%		63.00%		65.00%
Local Municipal Bonds [Member]
Securities [Abstract]
HTM debt securities	$ 113,900		$ 113,900		$ 85,700
Past Due [Member]
Securities [Abstract]
HTM debt securities	0		0		0
Asset Pledged as Collateral [Member] \| Public Deposits or Other Purposes [Member]
Securities [Abstract]
AFS and HTM securities	1,800,000		1,800,000		1,870,000
Asset Pledged as Collateral [Member] \| Securities Sold under Repurchase Agreements [Member]
Securities [Abstract]
AFS and HTM securities	$ 209,600		$ 209,600		$ 207,600

Defined Benefit Post-Retirement Plans - Net Periodic Pension Benefits and Other Benefit Costs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Pension Benefits [Member]
Components of net periodic (benefit) cost:
Service cost	$ 671	$ 676	$ 1,343	$ 1,369
Interest cost	1,164	1,137	2,329	2,206
Expected return on plan assets	(2,312)	(2,091)	(4,625)	(4,136)
Net amortization	32	308	65	633
Total net periodic (benefit) cost	(445)	30	(888)	72
Other Benefits [Member]
Components of net periodic (benefit) cost:
Service cost	0	1	1	2
Interest cost	58	59	116	118
Expected return on plan assets	0	0	0	0
Net amortization	0	(1)	(1)	(2)
Total net periodic (benefit) cost	$ 58	$ 59	$ 116	$ 118

Summary of Significant Accounting Policies	6 Months Ended
Summary of Significant Accounting Policies	Jun. 30, 2026
Summary of Significant Accounting Policies [Abstract]
Summary of Significant Accounting Policies	2. Summary of Significant Accounting Policies Basis of Presentation The accompanying unaudited interim consolidated financial statements include the accounts of NBT Bancorp Inc. and its wholly-owned subsidiaries mentioned above. In the opinion of management, the interim data includes all adjustments, consisting only of normal recurring adjustments, necessary for a fair presentation of the results for the interim periods in accordance with U.S. generally accepted accounting principles (“GAAP”) and in accordance with the instructions for the Quarterly Report on Form 10-Q and Article 10 of Regulation S-X as promulgated by the Securities and Exchange Commission (“SEC”). Accordingly, the consolidated financial statements do not include all of the information and notes necessary for complete financial statements in conformity with GAAP. These unaudited interim consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company’s 2025 Annual Report on Form 10-K. The results of operations for the interim periods are not necessarily indicative of the results that may be expected for the full year or any other interim period. All material intercompany transactions have been eliminated in consolidation. Amounts previously reported in the consolidated financial statements are reclassified whenever necessary to conform to current period presentation. The Company has evaluated subsequent events for potential recognition and/or disclosure, and none were identified. Use of Estimates in the Preparation of Financial Statements The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts in the financial statements and accompanying notes. Actual results may differ from those estimates and such differences could be material to the financial statements. Estimates associated with the allowance for credit losses are particularly susceptible to material changes in the near term.

Allowance for Credit Losses and Credit Quality of Loans

6 Months Ended

Jun. 30, 2026

Allowance for Credit Losses and Credit Quality of Loans [Abstract]

Allowance for Credit Losses and Credit Quality of Loans

7. Allowance for Credit Losses and Credit Quality of Loans

The allowance for credit losses totaled $140.5 million at June 30, 2026, compared to $138.0 million at December 31, 2025. The allowance for credit losses as a percentage of loans was 1.18% at June 30, 2026, compared to 1.19% at December 31, 2025.

The allowance for credit losses calculation incorporated a 6-quarter forecast period to account for forecast economic conditions under each scenario utilized in the measurement. For periods beyond the 6-quarter forecast, the model reverts to long-term economic conditions over a 4-quarter reversion period on a straight-line basis. The Company considers a baseline, upside and downside economic forecast in measuring the allowance. From the second quarter of 2025 through the fourth quarter of 2025, the Company included an additional downside scenario with stagflation conditions, which is characterized as an economic environment where inflation rises alongside unemployment. Stagflation was identified as an emerging risk as tariff policies impacted the economy.

The quantitative model as of June 30, 2026 incorporated a baseline economic outlook along with alternative upside and downside scenarios sourced from a reputable third-party to accommodate other potential economic conditions in the model. At June 30, 2026, the weightings were 60%, 5% and 35% for the baseline, upside and downside economic forecast scenarios, respectively. The baseline outlook reflected an economic environment where the northeast unemployment rate increases from 4.46% in the second quarter of 2026 to 4.65% by the end of the forecast period, with a peak northeast unemployment rate of 4.69% in the second quarter of 2027. National Gross Domestic Product (“GDP”) annualized growth (on a quarterly basis) is expected to start the third quarter of 2026 at approximately 1.95% and decrease to 1.93% by the end of the forecast period. Key assumptions in the baseline economic outlook included the Federal Reserve keeping their policy rate in the current range of 3.50%-3.75% and the economy remaining at full employment. The alternative upside scenario assumes improved economic conditions from the baseline outlook. Under this scenario, northeast unemployment falls from 4.46% in the second quarter of 2026 to 3.85% in the third quarter of 2027 and eventually settles at 3.90% by the end of the forecast period. The alternative downside scenario with recessionary conditions assumes deteriorated economic conditions from the baseline outlook. Under this scenario, northeast unemployment rises from 4.46% in the second quarter of 2026 to a peak of 7.81% in the third quarter of 2027. These scenarios and their respective weightings are evaluated at each measurement date and reflect management’s expectations as of June 30, 2026. Additional qualitative adjustments were made for factors not incorporated in the forecasts or the model, such as loss rate expectations for certain loan pools.

The quantitative model as of March 31, 2026 incorporated a baseline economic outlook along with alternative upside and downside scenarios sourced from a reputable third-party to accommodate other potential economic conditions in the model. At March 31, 2026, the weightings were 60%, 5% and 35% for the baseline, upside and downside economic forecast scenarios, respectively. The baseline outlook reflected an economic environment where the northeast unemployment rate decreases from 4.6% in the second quarter of 2026 to 4.56% by the end of the forecast period, with a peak northeast unemployment rate of 4.6% in the third quarter of 2026. National GDP annualized growth (on a quarterly basis) is expected to start the second quarter of 2026 at approximately 2.75% and decrease to 1.72% by the end of the forecast period. Key assumptions in the baseline economic outlook included the Federal Reserve cutting rates with two 25 basis point cuts at the June and September meetings and the economy remaining at full employment. The alternative upside scenario assumes improved economic conditions from the baseline outlook. Under this scenario, northeast unemployment falls from 4.6% in the first quarter of 2026 to 3.7% in the second quarter of 2027 and eventually settles at 3.8% by the end of the forecast period. The alternative downside scenario with recessionary conditions assumes deteriorated economic conditions from the baseline outlook. Under this scenario, northeast unemployment rises from 4.6% in the first quarter of 2026 to a peak of 7.8% in the second quarter of 2027. The alternative downside stagflation scenario was removed in the first quarter of 2026 following a recalibration of the scenario’s narrative and model by the reputable third-party, which no longer provided a relevant stagflation scenario. These scenarios and their respective weightings are evaluated at each measurement date and reflect management’s expectations as of March 31, 2026. Additional qualitative adjustments were made for factors not incorporated in the forecasts or the model, such as loss rate expectations for certain loan pools and recent trends in asset value indices. Additional monitoring for industry concentrations, loan growth and policy exceptions was also conducted.

The quantitative model as of December 31, 2025 incorporated a baseline economic outlook along with alternative upside scenario and two equally weighted downside scenarios, recessionary conditions and stagflation, sourced from a reputable third-party to accommodate other potential economic conditions in the model. At December 31, 2025, the weightings were 65%, 5% and 30% for the baseline, upside and downside economic forecast scenarios, respectively. The baseline outlook reflected an economic environment where the northeast unemployment rate increases from 4.5% in the first quarter of 2026 to 4.8% by the end of the forecast period, with a peak northeast unemployment rate of 4.9% in the fourth quarter of 2026. National GDP annualized growth (on a quarterly basis) is expected to start the first quarter of 2026 at approximately 2.55% and decrease to 1.8% by the end of the forecast period. Key assumptions in the baseline economic outlook included the Federal Reserve cutting rates with one 25 basis point cut at the December meeting and the economy remaining at full employment. The alternative upside scenario assumes improved economic conditions from the baseline outlook. Under this scenario, northeast unemployment falls from 4.4% in the fourth quarter of 2025 to 4.0% in the second quarter of 2026 and eventually settles at 4.1% by the end of the forecast period. The alternative downside scenario with recessionary conditions assumes deteriorated economic conditions from the baseline outlook. Under this scenario, northeast unemployment rises from 4.4% in the fourth quarter of 2025 to a peak of 7.8% in the first quarter of 2027. The alternative downside stagflation scenario assumes deteriorated economic conditions from the baseline outlook. Under this scenario, northeast unemployment rises from 4.4% in the fourth quarter of 2025 to 6% by the end of the forecast period in the second quarter of 2027, with a peak northeast unemployment rate of 8.2% in the first quarter of 2028. These scenarios and their respective weightings are evaluated at each measurement date and reflect management’s expectations as of December 31, 2025. Additional qualitative adjustments were made for factors not incorporated in the forecasts or the model, such as loss rate expectations for certain loan pools, reversion adjustments for the stagflation scenario and recent trends in asset value indices. Additional monitoring for industry concentrations, loan growth and policy exceptions was also conducted.

There were no loans purchased with credit deterioration during the three and six months ended June 30, 2026. There were $336.4 million of PCD loans acquired from Evans during the year ended December 31, 2025, which resulted in an allowance for credit losses at acquisition of $7.7 million. During six months ended June 30, 2026, the Company purchased $7.7 million of residential loans at a 4.5% premium with an $82 thousand allowance for credit losses recorded for these loans. During 2025, the Company purchased $21.3 million of residential loans at a 4.5% premium with a $234 thousand allowance for credit losses recorded for these loans.

The Company made a policy election to report AIR in the other assets line item on the consolidated balance sheets. AIR on loans totaled $42.0 million at June 30, 2026 and $42.5 million at December 31, 2025 and with no estimated allowance for credit losses related to AIR at June 30, 2026 and December 31, 2025 as it is excluded from amortized cost.

The following tables present the activity in the allowance for credit losses by our portfolio segments:


(In thousands)	Commercial Loans			Consumer Loans			Residential			Total
Balance as of March 31, 2026	$	63,096		$	44,047		$	31,457		$	138,600
Charge-offs		(1,379	)		(4,424	)		(193	)		(5,996	)
Recoveries		107			1,478			175			1,760
Provision		2,738			2,706			692			6,136
Ending balance as of June 30, 2026	$	64,562		$	43,807		$	32,131		$	140,500
Balance as of March 31, 2025	$	48,730		$	41,696		$	26,574		$	117,000
Allowance for credit loss on PCD acquired loans		7,355			-			371			7,726
Charge-offs		(533	)		(3,837	)		(61	)		(4,431	)
Recoveries		409			1,566			95			2,070
Provision		10,060			1,444			6,331			17,835
Ending balance as of June 30, 2025	$	66,021		$	40,869		$	33,310		$	140,200


(In thousands)	Commercial Loans			Consumer Loans			Residential			Total
Balance as of December 31, 2025	$	61,725		$	42,583		$	33,692		$	138,000
Charge-offs		(3,865	)		(8,782	)		(205	)		(12,852	)
Recoveries		304			3,049			286			3,639
Provision		6,398			6,957			(1,642	)		11,713
Ending balance as of June 30, 2026	$	64,562		$	43,807		$	32,131		$	140,500
Balance as of December 31, 2024	$	45,453		$	43,987		$	26,560		$	116,000
Allowance for credit loss on PCD acquired loans		7,355			-			371			7,726
Charge-offs		(2,755	)		(9,713	)		(118	)		(12,586	)
Recoveries		516			2,972			183			3,671
Provision		15,452			3,623			6,314			25,389
Ending balance as of June 30, 2025	$	66,021		$	40,869		$	33,310		$	140,200

The allowance for credit losses as of June 30, 2026 increased compared to December 31, 2025 and June 30, 2025 primarily due to providing for current year loan growth, change in scenario weightings and the establishment of specific reserves during the first quarter of 2026 for newly identified individually evaluated loans. These increases to the allowance for credit losses were partially offset by model adjustment, accelerated prepayment speeds and changes in loan composition and balances, including reductions driven by other consumer and residential solar portfolios that are in a planned run-off status. First quarter 2026 model adjustments lowered the allowance, as updates from the annual model review and recalibration process incorporated recent delinquency and loss experience which reflected improved default estimates across most portfolio segments.

Individually Evaluated Loans

The threshold for evaluating commercial loans risk graded substandard or doubtful, and nonperforming loans specifically evaluated for individual credit loss is $1.0 million. As of June 30, 2026, ten relationships were identified for individual credit loss evaluation with an amortized cost basis of $31.8 million, with $3.1 million of allowance for credit loss. As of June 30, 2026, there were $26.4 million of loans in nonaccrual status that were specifically evaluated for individual credit loss with no allowance for credit loss as the fair value of the underlying collateral supported the amortized cost. As of December 31, 2025, five relationships with an amortized cost basis of $12.2 million were identified for individual credit loss evaluation. These relationships were in nonaccrual status and with no allowance for credit loss as the fair value of the underlying collateral supported the amortized cost.

The following table sets forth information with regard to past due and nonperforming loans by loan segment:



(In thousands)	31–60 Days Past Due Accruing		61–90 Days Past Due Accruing		Greater Than 90 Days Past Due Accruing		Total Past Due Accruing		Nonaccrual		Current		Recorded Total Loans
As of June 30, 2026
Commercial loans:
C&I	$	1,549	$	676	$	-	$	2,225	$	10,051	$	1,719,036	$	1,731,312
CRE		26,266		12,398		-		38,664		30,508		4,642,122		4,711,294
Total commercial loans	$	27,815	$	13,074	$	-	$	40,889	$	40,559	$	6,361,158	$	6,442,606
Consumer loans:
Auto	$	12,082	$	2,183	$	590	$	14,855	$	2,677	$	1,412,524	$	1,430,056
Residential solar		3,525		1,763		934		6,222		55		686,900		693,177
Other consumer		801		465		205		1,471		117		75,096		76,684
Total consumer loans	$	16,408	$	4,411	$	1,729	$	22,548	$	2,849	$	2,174,520	$	2,199,917
Residential	$	8,392	$	2,390	$	681	$	11,463	$	19,490	$	3,200,605	$	3,231,558
Total loans	$	52,615	$	19,875	$	2,410	$	74,900	$	62,898	$	11,736,283	$	11,874,081



(In thousands)	31–60 Days Past Due Accruing		61–90 Days Past Due Accruing		Greater Than 90 Days Past Due Accruing		Total Past Due Accruing		Nonaccrual		Current		Recorded Total Loans
As of December 31, 2025
Commercial loans:
C&I	$	761	$	126	$	103	$	990	$	1,947	$	1,645,794	$	1,648,731
CRE		1,802		5,112		2,117		9,031		17,987		4,592,983		4,620,001
Total commercial loans	$	2,563	$	5,238	$	2,220	$	10,021	$	19,934	$	6,238,777	$	6,268,732
Consumer loans:
Auto	$	12,884	$	2,106	$	965	$	15,955	$	2,940	$	1,298,470	$	1,317,365
Residential solar		4,846		1,396		1,241		7,483		90		729,397		736,970
Other consumer		1,200		467		339		2,006		63		80,824		82,893
Total consumer loans	$	18,930	$	3,969	$	2,545	$	25,444	$	3,093	$	2,108,691	$	2,137,228
Residential	$	5,203	$	666	$	2,366	$	8,235	$	21,565	$	3,162,354	$	3,192,154
Total loans	$	26,696	$	9,873	$	7,131	$	43,700	$	44,592	$	11,509,822	$	11,598,114

Credit Quality Indicators

The Company has developed an internal loan grading system to evaluate and quantify the Company’s loan portfolio with respect to quality and risk, focusing on, among other things, borrower’s financial strength, experience and depth of borrower’s management, primary and secondary sources of repayment, payment history, nature of the business and industry outlook. The internal grading system enables the Company to monitor the quality of the entire loan portfolio on a consistent basis and provide management with an early warning system, which facilitates recognition of and response to problem loans and potential problem loans.

Commercial Grading System

For Commercial & Industrial (“C&I”) and Commercial Real Estate (“CRE”) loans, the Company uses a grading system that relies on quantifiable and measurable characteristics when available. This includes comparison of financial strength to available industry averages, comparison of transaction factors (loan terms and conditions) to loan policy and comparison of credit history to stated repayment terms and industry averages. Some grading factors are necessarily more subjective such as economic and industry factors, regulatory environment and management. C&I and CRE loans are graded Doubtful, Substandard, Special Mention and Pass.

Doubtful - A Doubtful loan has a high probability of total or substantial loss, but because of specific pending events that may strengthen the asset, its classification as a loss is deferred. Doubtful borrowers are usually in default, lack adequate liquidity or capital and lack the resources necessary to remain an operating entity. Pending events can include mergers, acquisitions, liquidations, capital injections, the perfection of liens on additional collateral, the valuation of collateral and refinancing. Generally, pending events should be resolved within a relatively short period and the ratings will be adjusted based on the new information. Nonaccrual treatment is required for Doubtful assets because of the high probability of loss.

Substandard - Substandard loans have a high probability of payment default or they have other well-defined weaknesses. They require more intensive supervision by bank management. Substandard loans are generally characterized by current or expected unprofitable operations, inadequate debt service coverage, inadequate liquidity or marginal capitalization. Repayment may depend on collateral or other credit risk mitigants. For some Substandard loans, the likelihood of full collection of interest and principal may be in doubt and those loans should be placed on nonaccrual. Although Substandard assets in the aggregate will have a distinct potential for loss, an individual asset’s loss potential does not have to be distinct for the asset to be rated Substandard.

Special Mention - Special Mention loans have potential weaknesses that may, if not checked or corrected, weaken the asset or inadequately protect the Company’s position at some future date. These loans pose elevated risk, but their weakness does not yet justify a Substandard classification. Borrowers may be experiencing adverse operating trends (i.e., declining revenues or margins) or may be struggling with an ill-proportioned balance sheet (i.e., increasing inventory without an increase in sales, high leverage and/or tight liquidity). Adverse economic or market conditions, such as interest rate increases or the entry of a new competitor, may also support a Special Mention rating. Although a Special Mention loan has a higher PD than a Pass asset, its default is not imminent.

Pass - Loans graded as Pass encompass all loans not graded as Doubtful, Substandard or Special Mention. Pass loans are in compliance with loan covenants and payments are generally made as agreed. Pass loans range from superior quality to fair quality. Pass loans also include any portion of a government guaranteed loan.

Consumer and Residential Grading System

Consumer and Residential loans are graded as either Nonperforming or Performing.

Nonperforming - Nonperforming loans are loans that are (1) over 90 days past due and interest is still accruing or (2) on nonaccrual status.

Performing - All loans not meeting any of the above criteria are considered Performing.





(In thousands)		2026			2025			2024			2023			2022			Prior			Revolving Loans Amortized Cost Basis		Revolving Loans Converted to Term		Total
As of June 30, 2026
C&I
By internally assigned grade:
Pass	$	169,129		$	219,469		$	177,007		$	118,326		$	107,129		$	245,568		$	576,276	$	16,721	$	1,629,625
Special Mention		190			2,081			6,168			1,866			905			3,337			6,436		-		20,983
Substandard		2,253			602			3,603			6,025			10,939			13,818			37,631		390		75,261
Doubtful		-			1,250			4,137			30			25			1			-		-		5,443
Total C&I	$	171,572		$	223,402		$	190,915		$	126,247		$	118,998		$	262,724		$	620,343	$	17,111	$	1,731,312
Current-period gross charge-offs	$	-		$	(399	)	$	(84	)	$	(1,276	)	$	(48	)	$	(192	)	$	-	$	-	$	(1,999	)
CRE
By internally assigned grade:
Pass	$	302,180		$	366,113		$	453,376		$	408,916		$	619,133		$	1,800,135		$	353,987	$	44,074	$	4,347,914
Special mention		-			2,950			7,021			28,612			55,777			67,831			7,964		8,678		178,833
Substandard		299			4,647			26,980			24,091			25,557			90,661			12,069		243		184,547
Total CRE	$	302,479		$	373,710		$	487,377		$	461,619		$	700,467		$	1,958,627		$	374,020	$	52,995	$	4,711,294
Current-period gross charge-offs	$	-		$	-		$	-		$	-		$	(806	)	$	(1,060	)	$	-	$	-	$	(1,866	)
Auto
By payment activity:
Performing	$	406,028		$	461,494		$	293,880		$	148,916		$	91,504		$	24,967		$	-	$	-	$	1,426,789
Nonperforming		32			688			805			959			536			247			-		-		3,267
Total auto	$	406,060		$	462,182		$	294,685		$	149,875		$	92,040		$	25,214		$	-	$	-	$	1,430,056
Current-period gross charge-offs	$	(1	)	$	(542	)	$	(649	)	$	(582	)	$	(539	)	$	(199	)	$	-	$	-	$	(2,512	)
Residential solar
By payment activity:
Performing	$	904		$	1,878		$	2,091		$	102,747		$	346,409		$	238,159		$	-	$	-	$	692,188
Nonperforming		-			-			-			92			554			343			-		-		989
Total residential solar	$	904		$	1,878		$	2,091		$	102,839		$	346,963		$	238,502		$	-	$	-	$	693,177
Current-period gross charge-offs	$	-		$	-		$	-		$	(381	)	$	(2,867	)	$	(1,312	)	$	-	$	-	$	(4,560	)
Other consumer
By payment activity:
Performing	$	12,794		$	9,685		$	5,054		$	2,197		$	2,481		$	17,215		$	26,911	$	25	$	76,362
Nonperforming		-			41			18			16			57			147			4		39		322
Total other consumer	$	12,794		$	9,726		$	5,072		$	2,213		$	2,538		$	17,362		$	26,915	$	64	$	76,684
Current-period gross charge-offs	$	(325	)	$	(379	)	$	(85	)	$	(51	)	$	(140	)	$	(730	)	$	-	$	-	$	(1,710	)
Residential
By payment activity:
Performing	$	148,655		$	197,230		$	232,276		$	233,051		$	392,812		$	1,615,444		$	377,831	$	14,088	$	3,211,387
Nonperforming		-			88			1,436			2,382			3,050			12,961			-		254		20,171
Total residential	$	148,655		$	197,318		$	233,712		$	235,433		$	395,862		$	1,628,405		$	377,831	$	14,342	$	3,231,558
Current-period gross charge-offs	$	-		$	-		$	(23	)	$	-		$	-		$	(182	)	$	-	$	-	$	(205	)
Total loans	$	1,042,464		$	1,268,216		$	1,213,852		$	1,078,226		$	1,656,868		$	4,130,834		$	1,399,109	$	84,512	$	11,874,081
Current-period gross charge-offs	$	(326	)	$	(1,320	)	$	(841	)	$	(2,290	)	$	(4,400	)	$	(3,675	)	$	-	$	-	$	(12,852	)



(In thousands)		2025			2024			2023			2022			2021			Prior			Revolving Loans Amortized Cost Basis		Revolving Loans Converted to Term		Total
As of December 31, 2025
C&I
By internally assigned grade:
Pass	$	264,031		$	212,997		$	147,722		$	147,300		$	127,598		$	166,819		$	475,710	$	6,820	$	1,548,997
Special mention		1,063			7,729			4,131			7,010			807			2,809			7,405		-		30,954
Substandard		722			3,150			5,122			7,322			11,744			2,208			37,794		611		68,673
Doubtful		-			-			58			33			16			-			-		-		107
Total C&I	$	265,816		$	223,876		$	157,033		$	161,665		$	140,165		$	171,836		$	520,909	$	7,431	$	1,648,731
Current-period gross charge-offs	$	-		$	(497	)	$	(477	)	$	(63	)	$	(263	)	$	(1,218	)	$	-	$	-	$	(2,518	)
CRE
By internally assigned grade:
Pass	$	360,858		$	483,504		$	436,790		$	627,582		$	577,221		$	1,362,602		$	329,111	$	49,483	$	4,227,151
Special mention		5,509			7,351			22,545			50,020			15,226			62,542			7,053		-		170,246
Substandard		5,080			16,539			17,226			44,496			19,266			102,861			17,136		-		222,604
Total CRE	$	371,447		$	507,394		$	476,561		$	722,098		$	611,713		$	1,528,005		$	353,300	$	49,483	$	4,620,001
Current-period gross charge-offs	$	-		$	-		$	(178	)	$	-		$	-		$	(2,105	)	$	-	$	-	$	(2,283	)
Auto
By payment activity:
Performing	$	563,305		$	371,367		$	199,608		$	132,355		$	40,036		$	6,789		$	-	$	-	$	1,313,460
Nonperforming		547			1,185			982			738			375			78			-		-		3,905
Total auto	$	563,852		$	372,552		$	200,590		$	133,093		$	40,411		$	6,867		$	-	$	-	$	1,317,365
Current-period gross charge-offs	$	(263	)	$	(1,526	)	$	(1,320	)	$	(1,494	)	$	(609	)	$	(262	)	$	-	$	-	$	(5,474	)
Residential solar
By payment activity:
Performing	$	1,978		$	2,200		$	108,529		$	365,629		$	150,757		$	106,546		$	-	$	-	$	735,639
Nonperforming		-			-			58			761			384			128			-		-		1,331
Total Residential solar	$	1,978		$	2,200		$	108,587		$	366,390		$	151,141		$	106,674		$	-	$	-	$	736,970
Current-period gross charge-offs	$	-		$	-		$	(1,012	)	$	(5,153	)	$	(1,619	)	$	(844	)	$	-	$	-	$	(8,628	)
Other consumer
By payment activity:
Performing	$	16,080		$	7,334		$	3,257		$	4,465		$	11,689		$	13,636		$	25,995	$	35	$	82,491
Nonperforming		-			29			26			37			135			126			15		34		402
Total other consumer	$	16,080		$	7,363		$	3,283		$	4,502		$	11,824		$	13,762		$	26,010	$	69	$	82,893
Current-period gross charge-offs	$	(815	)	$	(404	)	$	(95	)	$	(941	)	$	(1,940	)	$	(1,195	)	$	-	$	-	$	(5,390	)
Residential
By payment activity:
Performing	$	192,323		$	237,485		$	244,007		$	404,751		$	473,304		$	1,242,708		$	346,079	$	27,566	$	3,168,223
Nonperforming		-			1,629			2,419			3,126			3,238			13,278			76		165		23,931
Total residential	$	192,323		$	239,114		$	246,426		$	407,877		$	476,542		$	1,255,986		$	346,155	$	27,731	$	3,192,154
Current-period gross charge-offs	$	-		$	(16	)	$	(272	)	$	(574	)	$	-		$	(54	)	$	-	$	-	$	(916	)
Total loans	$	1,411,496		$	1,352,499		$	1,192,480		$	1,795,625		$	1,431,796		$	3,083,130		$	1,246,374	$	84,714	$	11,598,114
Current-period gross charge-offs	$	(1,078	)	$	(2,443	)	$	(3,354	)	$	(8,225	)	$	(4,431	)	$	(5,678	)	$	-	$	-	$	(25,209	)

Allowance for Credit Losses on Off-Balance Sheet Credit Exposures

The allowance for credit losses on unfunded commitments totaled $5.5 million as of June 30, 2026, compared to $5.8 million as of December 31, 2025. There was no reserve for unfunded loan commitments for the three months ended June 30, 2026, compared to $1.7 million for the three months ended June 30, 2025. The reserve for unfunded loan commitments was $(0.3) million for the six months ended June 30, 2026, compared to $1.8 million for the six months ended June 30, 2025. The reserve for unfunded loan commitments was recorded within other noninterest expense in the unaudited interim consolidated statements of income. Included in the reserve for unfunded loan commitments for the three and six months ended June 30, 2025, was $0.5 million of acquisition-related provision for unfunded loan commitments due to the Evans acquisition.

Loan Modifications to Borrowers Experiencing Financial Difficulties

When the Company modifies a loan with financial difficulty, such modifications generally include one or a combination of the following: an extension of the maturity date at a stated rate of interest lower than the current market rate for new debt with similar risk; a change in scheduled payment amount; or principal forgiveness.


	Three Months Ended June 30, 2026
	Term Extension
(Dollars in thousands)			Amortized Cost	% of Total Class of Financing Receivables
Consumer loans:
Auto		$	9	0.001	%
Total consumer loans		$	9
Residential		$	593	0.018	%
Total		$	602


	Three Months Ended June 30, 2025
	Term Extension					Combination - Term Extension and Interest Rate Reduction
(Dollars in thousands)			Amortized Cost	% of Total Class of Financing Receivables				Amortized Cost	% of Total Class of Financing Receivables
Residential		$	117	0.004	%		$	28	0.001	%
Total		$	117				$	28


	Six Months Ended June 30, 2026
	Term Extension
(Dollars in thousands)		Amortized Cost		% of Total Class of Financing Receivables
Consumer loans:
Auto		$	9		0.001	%
Total consumer loans		$	9
Residential		$	1,237		0.038	%
Total		$	1,246


	Six Months Ended June 30, 2025
	Term Extension						Combination - Term Extension and Interest Rate Reduction
(Dollars in thousands)		Amortized Cost		% of Total Class of Financing Receivables				Amortized Cost		% of Total Class of Financing Receivables
Residential		$	894		0.028	%		$	28	0.001	%
Total		$	894					$	28

The following tables describe the financial effect of the modifications made to borrowers experiencing financial difficulties:


	Three Months Ended June 30, 2026
Loan Type	Term Extension
Auto	Added a weighted-average 1.8 years to the life of loans, which reduced monthly payment amounts for the borrowers
Residential	Added a weighted-average 8.0 years to the life of loans, which reduced monthly payment amounts for the borrowers


	Three Months Ended June 30, 2025
Loan Type	Term Extension	Interest Rate Reduction
Residential	Added a weighted-average 9.8 years to the life of loans, which reduced monthly payment amounts for the borrowers	Reduced interest by weighted average of 0.62%, which reduced the monthly payment amount for the borrowers


	Six Months Ended June 30, 2026
Loan Type	Term Extension
Auto	Added a weighted-average 1.8 years to the life of loans, which reduced monthly payment amounts for the borrowers
Residential	Added a weighted-average 5.4 years to the life of loans, which reduced monthly payment amounts for the borrowers


	Six Months Ended June 30, 2025
Loan Type	Term Extension	Interest Rate Reduction
Residential	Added a weighted-average 7.5 years to the life of loans, which reduced monthly payment amounts for the borrowers	Reduced interest by weighted average of 0.62%, which reduced the monthly payment amount for the borrowers

There were no financing receivables that had a payment default during the three and six months ended June 30, 2026 that were modified to borrowers experiencing financial difficulty in the twelve months prior to the default. During the three and six months ended June 30, 2025, there were $11 thousand and $69 thousand, respectively, of residential financing receivables with term extension modifications that had payment defaults during the period, that were modified to borrowers experiencing financial difficulty in the twelve months prior to the default.

The following tables depict the performance of loans that have been modified to borrowers experiencing financial difficulty that were modified in the prior twelve months:


	Payment Status (Amortized Cost Basis)
(In thousands)	Current		31-60 Days Past Due		61-90 Days Past Due		Greater than 90 Days Past Due
As of June 30, 2026
Consumer loans:
Auto	$	-	$	-	$	9	$	-
Total consumer loans	$	-	$	-	$	9	$	-
Residential	$	1,839	$	-	$	-	$	-
Total	$	1,839	$	-	$	9	$	-

	Payment Status (Amortized Cost Basis)
(In thousands)		Current		31-60 Days Past Due		61-90 Days Past Due		Greater than 90 Days Past Due
As of June 30, 2025
Residential		$	1,692	$	11	$	58	$	-
Total		$	1,692	$	11	$	58	$	-

Fair Value Measurements and Fair Value of Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2026

Fair Value Measurements and Fair Value of Financial Instruments [Abstract]

Fair Value of Financial Assets and Liabilities Measured on a Recurring Basis


(In thousands)	Level 1		Level 2		Level 3		June 30, 2026
Assets:
AFS securities:
U.S. treasury	$	101,758	$	-	$	-	$	101,758
Federal agency		-		231,129		-		231,129
State & municipal		-		81,122		-		81,122
Mortgage-backed		-		734,835		-		734,835
Collateralized mortgage obligations		-		835,648		-		835,648
Corporate		-		21,714		-		21,714
Total AFS securities	$	101,758	$	1,904,448	$	-	$	2,006,206
Equity securities		49,732		1,000		-		50,732
Derivatives		-		54,699		-		54,699
Total	$	151,490	$	1,960,147	$	-	$	2,111,637
Liabilities:
Derivatives	$	-	$	72,053	$	-	$	72,053
Total	$	-	$	72,053	$	-	$	72,053


(In thousands)	Level 1		Level 2		Level 3		December 31, 2025
Assets:
AFS securities:
U.S. treasury	$	76,822	$	-	$	-	$	76,822
Federal agency		-		231,276		-		231,276
State & municipal		-		86,727		-		86,727
Mortgage-backed		-		591,562		-		591,562
Collateralized mortgage obligations		-		855,486		-		855,486
Corporate		-		20,965		-		20,965
Total AFS securities	$	76,822	$	1,786,016	$	-	$	1,862,838
Equity securities		47,760		1,000		-		48,760
Derivatives		-		52,104		-		52,104
Total	$	124,582	$	1,839,120	$	-	$	1,963,702
Liabilities:
Derivatives	$	-	$	68,066	$	-	$	68,066
Total	$	-	$	68,066	$	-	$	68,066

Information with Regard to Estimated Fair Values of Financial Instruments


			June 30, 2026				December 31, 2025
	Fair Value		Carrying		Estimated		Carrying		Estimated
(In thousands)	Hierarchy		Amount		Fair Value		Amount		Fair Value
Financial assets:
HTM securities		2	$	755,086	$	692,689	$	762,756	$	702,577
Net loans		3		11,733,581		11,528,110		11,461,222		11,337,753
Financial liabilities:
Time deposits		2	$	1,328,884	$	1,315,245	$	1,492,445	$	1,484,165
Long-term debt		2		43,043		42,965		43,176		43,395
Subordinated debt		1		-		-		24,509		24,016
Junior subordinated debt		2		111,714		97,775		111,668		98,841

Securities (Tables)

6 Months Ended

Jun. 30, 2026

Securities [Abstract]

Amortized Cost, Estimated Fair Value and Unrealized Gains (Losses) of AFS Securities

The amortized cost, estimated fair value and unrealized gains (losses) of AFS securities are as follows:


	Amortized		Unrealized		Unrealized			Estimated
(In thousands)	Cost		Gains		Losses			Fair Value
As of June 30, 2026
U.S. treasury	$	104,422	$	-	$	(2,664	)	$	101,758
Federal agency		248,293		-		(17,164	)		231,129
State & municipal		84,796		2		(3,676	)		81,122
Mortgage-backed:
Government-sponsored enterprises		589,968		506		(26,580	)		563,894
U.S. government agency securities		175,232		275		(4,566	)		170,941
Collateralized mortgage obligations:
Government-sponsored enterprises		625,419		1,504		(28,390	)		598,533
U.S. government agency securities		260,288		453		(23,626	)		237,115
Corporate		22,500		-		(786	)		21,714
Total AFS securities	$	2,110,918	$	2,740	$	(107,452	)	$	2,006,206
As of December 31, 2025
U.S. treasury	$	79,330	$	25	$	(2,533	)	$	76,822
Federal agency		248,312		-		(17,036	)		231,276
State & municipal		90,654		4		(3,931	)		86,727
Mortgage-backed:
Government-sponsored enterprises		470,606		1,651		(23,532	)		448,725
U.S. government agency securities		145,836		660		(3,659	)		142,837
Collateralized mortgage obligations:
Government-sponsored enterprises		653,512		2,137		(26,214	)		629,435
U.S. government agency securities		247,908		335		(22,192	)		226,051
Corporate		22,500		-		(1,535	)		20,965
Total AFS securities	$	1,958,658	$	4,812	$	(100,632	)	$	1,862,838

Amortized Cost, Estimated Fair Value and Unrealized Gains (Losses) of HTM Securities

The amortized cost, estimated fair value and unrealized gains (losses) of HTM securities are as follows:


	Amortized		Unrealized		Unrealized			Estimated
(In thousands)	Cost		Gains		Losses			Fair Value
As of June 30, 2026
Federal agency	$	100,000	$	-	$	(11,268	)	$	88,732
Mortgage-backed:
Government-sponsored enterprises		179,456		-		(23,892	)		155,564
U.S. government agency securities		12,021		-		(176	)		11,845
Collateralized mortgage obligations:
Government-sponsored enterprises		127,009		72		(6,394	)		120,687
U.S. government agency securities		55,640		-		(9,073	)		46,567
State & municipal		280,960		56		(11,722	)		269,294
Total HTM securities	$	755,086	$	128	$	(62,525	)	$	692,689
As of December 31, 2025
Federal agency	$	100,000	$	-	$	(10,705	)	$	89,295
Mortgage-backed:
Government-sponsored enterprises		188,942		-		(23,273	)		165,669
U.S. government agency securities		13,659		1		(106	)		13,554
Collateralized mortgage obligations:
Government-sponsored enterprises		136,464		115		(5,293	)		131,286
U.S. government agency securities		57,309		-		(9,396	)		47,913
State & municipal		266,382		76		(11,598	)		254,860
Total HTM securities	$	762,756	$	192	$	(60,371	)	$	702,577

Gains and (Losses) on Equity Securities

The following tables set forth information with regard to gains and (losses) on equity securities:


	Three Months Ended
	June 30,
(In thousands)		2026		2025
Net gains (losses) recognized on equity securities	$	175	$	112
Less: Net gains (losses) recognized on equity securities sold during the period		-		(35	)
Unrealized gains (losses) recognized on equity securities still held	$	175	$	147


	Six Months Ended
	June 30,
(In thousands)		2026		2025
Net gains (losses) recognized on equity securities	$	617	$	8
Less: Net gains (losses) recognized on equity securities sold during the period		-		(35	)
Unrealized gains (losses) recognized on equity securities still held	$	617	$	43

Contractual Maturities of Debt Securities

The following table sets forth information with regard to contractual maturities of debt securities at June 30, 2026:


	Amortized		Estimated
(In thousands)	Cost		Fair Value
AFS debt securities:
Within one year	$	79,941	$	78,871
From one to five years		688,941		656,741
From five to ten years		303,675		284,892
After ten years		1,038,361		985,702
Total AFS debt securities	$	2,110,918	$	2,006,206
HTM debt securities:
Within one year	$	122,217	$	122,161
From one to five years		222,517		206,822
From five to ten years		93,543		85,389
After ten years		316,809		278,317
Total HTM debt securities	$	755,086	$	692,689

Investment Securities with Unrealized Losses

The following table sets forth information with regard to investment securities with unrealized losses, for which an allowance for credit losses has not been recorded, segregated according to the length of time the securities were in a continuous unrealized loss position:








	Less Than 12 Months							12 Months or Longer							Total
						Number							Number							Number
	Fair		Unrealized			of		Fair		Unrealized			of		Fair		Unrealized			of
(In thousands)	Value		Losses			Positions		Value		Losses			Positions		Value		Losses			Positions
As of June 30, 2026
AFS securities:
U.S. treasury	$	29,700	$	(237	)		3	$	72,058	$	(2,427	)		4	$	101,758	$	(2,664	)		7
Federal agency		-		-			-		231,129		(17,164	)		16		231,129		(17,164	)		16
State & municipal		-		-			-		80,364		(3,676	)		59		80,364		(3,676	)		59
Mortgage-backed		317,746		(3,411	)		41		311,311		(27,735	)		126		629,057		(31,146	)		167
Collateralized mortgage obligations		197,645		(2,683	)		28		376,126		(49,333	)		100		573,771		(52,016	)		128
Corporate		-		-			-		21,714		(786	)		7		21,714		(786	)		7
Total securities with unrealized losses	$	545,091	$	(6,331	)		72	$	1,092,702	$	(101,121	)		312	$	1,637,793	$	(107,452	)		384
HTM securities:
Federal agency	$	-	$	-			-	$	88,732	$	(11,268	)		4	$	88,732	$	(11,268	)		4
Mortgage-backed		9,878		(143	)		3		157,509		(23,925	)		33		167,387		(24,068	)		36
Collateralized mortgage obligation		5,576		(72	)		1		156,717		(15,395	)		46		162,293		(15,467	)		47
State & municipal		16,562		(514	)		19		120,834		(11,208	)		121		137,396		(11,722	)		140
Total securities with unrealized losses	$	32,016	$	(729	)		23	$	523,792	$	(61,796	)		204	$	555,808	$	(62,525	)		227
As of December 31, 2025
AFS securities:
U.S. treasury	$	-	$	-			-	$	71,796	$	(2,533	)		4	$	71,796	$	(2,533	)		4
Federal agency		-		-			-		231,276		(17,036	)		16		231,276		(17,036	)		16
State & municipal		-		-			-		85,965		(3,931	)		64		85,965		(3,931	)		64
Mortgage-backed		49,453		(161	)		7		338,370		(27,030	)		135		387,913		(27,191	)		142
Collateralized mortgage obligations		80,781		(131	)		12		418,983		(48,275	)		105		499,764		(48,406	)		117
Corporate		-		-			-		20,965		(1,535	)		7		20,965		(1,535	)		7
Total securities with unrealized losses	$	130,234	$	(292	)		19	$	1,167,355	$	(100,340	)		331	$	1,297,679	$	(100,632	)		350
HTM securities:
Federal agency	$	-	$	-			-	$	89,295	$	(10,705	)		4	$	89,295	$	(10,705	)		4
Mortgage-backed		10,771		(71	)		1		168,422		(23,308	)		33		179,193		(23,379	)		34
Collateralized mortgage obligations		-		-			-		173,333		(14,689	)		47		173,333		(14,689	)		47
State & municipal		4,381		(245	)		7		142,139		(11,353	)		146		146,520		(11,598	)		153
Total securities with unrealized losses	$	15,152	$	(316	)		8	$	573,189	$	(60,055	)		230	$	588,341	$	(60,371	)		238

- Definition

Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-3

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-9

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
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- Definition

Tabular disclosure of information about investment in debt security measured at amortized cost (held-to-maturity).

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Consolidated Statements of Changes in Stockholders' Equity (unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in-Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Common Stock in Treasury [Member]	Total
Balance at Dec. 31, 2024	$ 540	$ 742,810	$ 1,100,209	$ (142,098)	$ (175,320)	$ 1,526,141
Statement [Line Items]
Net income	0	0	59,255	0	0	59,255
Cash dividends	0	0	(33,875)	0	0	(33,875)
Issuance of common stock for acquisition	51	221,716	0	0	0	221,767
Net issuance of shares to employee and other stock plans	0	(4,705)	0	0	926	(3,779)
Stock-based compensation	0	3,047	0	0	0	3,047
Other comprehensive income (loss)	0	0	0	32,610	0	32,610
Balance at Jun. 30, 2025	591	962,868	1,125,589	(109,488)	(174,394)	1,805,166
Balance at Mar. 31, 2025	540	740,865	1,120,887	(121,813)	(174,704)	1,565,775
Statement [Line Items]
Net income	0	0	22,510	0	0	22,510
Cash dividends	0	0	(17,808)	0	0	(17,808)
Issuance of common stock for acquisition	51	221,716	0	0	0	221,767
Net issuance of shares to employee and other stock plans	0	(586)	0	0	310	(276)
Stock-based compensation	0	873	0	0	0	873
Other comprehensive income (loss)	0	0	0	12,325	0	12,325
Balance at Jun. 30, 2025	591	962,868	1,125,589	(109,488)	(174,394)	1,805,166
Balance at Dec. 31, 2025	591	964,778	1,196,850	(82,596)	(183,407)	1,896,216
Statement [Line Items]
Net income	0	0	104,172	0	0	104,172
Cash dividends	0	0	(38,463)	0	0	(38,463)
Purchase of treasury shares	0	0	0	0	(14,030)	(14,030)
Net issuance of shares to employee and other stock plans	0	(2,894)	0	0	1,214	(1,680)
Stock-based compensation	0	4,240	0	0	0	4,240
Other comprehensive income (loss)	0	0	0	(6,536)	0	(6,536)
Balance at Jun. 30, 2026	591	966,124	1,262,559	(89,132)	(196,223)	1,943,919
Balance at Mar. 31, 2026	591	965,891	1,228,753	(87,315)	(193,523)	1,914,397
Statement [Line Items]
Net income	0	0	53,030	0	0	53,030
Cash dividends	0	0	(19,224)	0	0	(19,224)
Purchase of treasury shares	0	0	0	0	(3,016)	(3,016)
Net issuance of shares to employee and other stock plans	0	(638)	0	0	316	(322)
Stock-based compensation	0	871	0	0	0	871
Other comprehensive income (loss)	0	0	0	(1,817)	0	(1,817)
Balance at Jun. 30, 2026	$ 591	$ 966,124	$ 1,262,559	$ (89,132)	$ (196,223)	$ 1,943,919

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

- Definition

Value of stock issued pursuant to acquisitions during the period.

+ References

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Value, after forfeiture, of shares issued under share-based payment arrangement. Excludes employee stock ownership plan (ESOP).

+ References

+ Details

- Definition

Amount of equity (deficit) attributable to parent. Excludes temporary equity and equity attributable to noncontrolling interest.

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+ Details

- Definition

Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

+ References + Details

Allowance for Credit Losses and Credit Quality of Loans - Performance of Modified Loans (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025
Current [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Amortized cost	$ 1,839	$ 1,692
31-60 Days Past Due [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Amortized cost	0	11
61-90 Days Past Due [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Amortized cost	9	58
Greater Than 90 Days Past Due [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Amortized cost	0	0
Consumer Loans [Member] \| Current [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Amortized cost	0
Consumer Loans [Member] \| 31-60 Days Past Due [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Amortized cost	0
Consumer Loans [Member] \| 61-90 Days Past Due [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Amortized cost	9
Consumer Loans [Member] \| Greater Than 90 Days Past Due [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Amortized cost	0
Consumer Loans [Member] \| Auto [Member] \| Current [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Amortized cost	0
Consumer Loans [Member] \| Auto [Member] \| 31-60 Days Past Due [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Amortized cost	0
Consumer Loans [Member] \| Auto [Member] \| 61-90 Days Past Due [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Amortized cost	9
Consumer Loans [Member] \| Auto [Member] \| Greater Than 90 Days Past Due [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Amortized cost	0
Residential [Member] \| Current [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Amortized cost	1,839	1,692
Residential [Member] \| 31-60 Days Past Due [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Amortized cost	0	11
Residential [Member] \| 61-90 Days Past Due [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Amortized cost	0	58
Residential [Member] \| Greater Than 90 Days Past Due [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Amortized cost	$ 0	$ 0

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

Derivative Instruments and Hedging Activities (Tables)

6 Months Ended

Jun. 30, 2026

Derivative Instruments and Hedging Activities [Abstract]

Summary of Derivatives Outstanding

The following table summarizes the derivatives outstanding:

			Balance						Balance
	Notional		Sheet		Fair		Notional		Sheet		Fair
(In thousands)	Amount		Location		Value		Amount		Location		Value
As of June 30, 2026
Derivatives not designated as hedging instruments
Interest rate derivatives	$	1,279,476		Other assets	$	72,126	$	1,279,476	Other liabilities	$	72,037
Risk participation agreements		96,259		Other assets		44		37,673	Other liabilities		16
Total derivatives not designated as hedging instruments					$	72,170				$	72,053
Netting adjustments(1)						17,471					-
Net derivatives in the balance sheet					$	54,699				$	72,053
Derivatives not offset on the balance sheet					$	1,957				$	1,957
Cash collateral(2)						-					-
Net derivative amounts					$	52,742				$	70,096
As of December 31, 2025
Derivatives not designated as hedging instruments
Interest rate derivatives	$	1,332,295		Other assets	$	68,061	$	1,332,295	Other liabilities	$	68,050
Risk participation agreements		97,319		Other assets		53		15,791	Other liabilities		16
Total derivatives not designated as hedging instruments					$	68,114				$	68,066
Netting adjustments(1)						16,010					-
Net derivatives in the balance sheet					$	52,104				$	68,066
Derivatives not offset on the balance sheet					$	5,722				$	5,722
Cash collateral(2)						-					-
Net derivative amounts					$	46,382				$	62,344

(1)

(2)

Not Designated as Hedging Instrument [Member]

Derivative Instruments and Hedging Activities [Abstract]

Effect of Derivatives on AOCI and on Consolidated Statement of Income

The following table indicates the gain or loss recognized in income on derivatives not designated as hedging instruments:


	Three Months Ended June 30,							Six Months Ended June 30,
(In thousands)		2026			2025				2026		2025
Derivatives not designated as hedging instruments:
(Decrease) increase in other income		$	(3	)	$	(4	)		$	31	$	17

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References + Details

Commitments and Contingencies	6 Months Ended
Commitments and Contingencies	Jun. 30, 2026
Commitments and Contingencies [Abstract]
Commitments and Contingencies	14. Commitments and Contingencies The Company is a party to certain financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit, unused lines of credit, standby letters of credit and certain agricultural real estate loans sold to investors with recourse, with the sold portion having a government guarantee that is assignable back to the Company upon repurchase of the loan in the event of default. The Company’s exposure to credit loss in the event of nonperformance by the other party to the commitments to extend credit, unused lines of credit, standby letters of credit and loans sold with recourse is represented by the contractual amount of those instruments. The credit risk associated with commitments to extend credit and standby and commercial letters of credit is essentially the same as that involved with extending loans to customers and is subject to normal credit policies. Collateral may be obtained based on management’s assessment of the customer’s creditworthiness. Commitments to extend credit and unused lines of credit totaled $3.59 billion at June 30, 2026 and $3.40 billion at December 31, 2025. Since many loan commitments, standby letters of credit and guarantees and indemnification contracts expire without being funded in whole or in part, the contract amounts are not necessarily indicative of future cash flows. The Company does not issue any guarantees that would require liability-recognition or disclosure, other than its standby letters of credit. The Company guarantees the obligations or performance of customers by issuing standby letters of credit to third-parties. These standby letters of credit are generally issued in support of third-party debt, such as corporate debt issuances, industrial revenue bonds and municipal securities. The risk involved in issuing standby letters of credit is essentially the same as the credit risk involved in extending loan facilities to customers and letters of credit are subject to the same credit origination, portfolio maintenance and management procedures in effect to monitor other credit and off-balance sheet products. Typically, these instruments have one year expirations with an option to renew upon annual review; therefore, the total amounts do not necessarily represent future cash requirements. Standby letters of credit totaled $63.5 million at June 30, 2026 and $58.5 million at December 31, 2025. As of June 30, 2026 and December 31, 2025, the fair value of the Company’s standby letters of credit was not significant. In the normal course of business there are various outstanding legal proceedings. The Company accrues for material estimated losses from loss contingencies if the information available indicates that it is probable that a liability had been incurred at the date of the financial statements and the amount of loss can be reasonably estimated.

Loans (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Loans [Abstract]
Deferred loan origination (fees) costs, net	$ (27.6)	$ (37.9)

Reclassification Adjustments Out of Other Comprehensive Income (Loss)

6 Months Ended

Jun. 30, 2026

Reclassification Adjustments Out of Other Comprehensive Income (Loss) [Abstract]

Reclassification Adjustments Out of Other Comprehensive Income (Loss)

11. Reclassification Adjustments Out of Other Comprehensive Income (Loss)

The following table summarizes the reclassification adjustments out of AOCI:


Detail About AOCI Components		Amount Reclassified from AOCI						Affected line item in the Consolidated Statement of Comprehensive Income (Loss)
	Three Months Ended
(In thousands)		June 30, 2026			June 30, 2025
AFS securities:
Amortization of unrealized gains related to securities transfer		$	55		$	70		Interest income
Tax effect		$	(13	)	$	(17	)	Income tax (benefit)
Net of tax		$	42		$	53
Pension and other benefits:
Amortization of net losses		$	29		$	305		Other noninterest expense
Amortization of prior service costs			3			2		Other noninterest expense
Tax effect		$	(8	)	$	(77	)	Income tax (benefit)
Net of tax		$	24		$	230
Total reclassifications, net of tax		$	66		$	283


Detail About AOCI Components	Amount Reclassified from AOCI							Affected line item in the Consolidated Statement of Comprehensive Income (Loss)
	Six Months Ended
(In thousands)		June 30, 2026			June 30, 2025
AFS securities:
Amortization of unrealized gains related to securities transfer		$	113		$	145		Interest income
Tax effect		$	(28	)	$	(36	)	Income tax (benefit)
Net of tax		$	85		$	109
Pension and other benefits:
Amortization of net losses		$	58		$	626		Other noninterest expense
Amortization of prior service costs			6			5		Other noninterest expense
Tax effect		$	(16	)	$	(158	)	Income tax (benefit)
Net of tax		$	48		$	473
Total reclassifications, net of tax		$	133		$	582

Allowance for Credit Losses and Credit Quality of Loans (Details)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2026 USD ($) Relationship	Jun. 30, 2025 USD ($)	Jun. 30, 2026 USD ($) Relationship	Jun. 30, 2025 USD ($)	Dec. 31, 2025 USD ($) Relationship	Mar. 31, 2026 USD ($)	Mar. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Allowance for credit losses	$ 140,500,000	$ 140,200,000	$ 140,500,000	$ 140,200,000	$ 138,000,000	$ 138,600,000	$ 117,000,000	$ 116,000,000
Percentage of allowance for credit losses	1.18%		1.18%		1.19%
Loans purchased with credit deterioration	$ 0		$ 0
Threshold balance for loans specifically evaluated for individual credit loss	$ 1,000,000		$ 1,000,000
Individually evaluated loans, number of relationships (in Relationship) \| Relationship	10		10		5
Individually evaluated loans, amortized cost	$ 31,800,000		$ 31,800,000		$ 12,200,000
Individually evaluated loans, allowance for credit loss	3,100,000		3,100,000		0
Individually evaluated loans in nonaccrual status, amortized cost	26,400,000		26,400,000		12,200,000
Individually evaluated loans in nonaccrual status, allowance for credit losses	0		$ 0		0
Minimum number of days past due for loans to be considered nonperforming			90 days
Financing receivables with payment default that were modified to borrowers experiencing financial difficulty	0		$ 0
Other Consumer [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Overdrawn deposit related to gross charge-offs reported as 2025 originations			400,000		800,000
Overdrawn deposit related to gross charge-offs reported as 2026 originations			300,000
Overdrawn deposit related to gross charge-offs reported as 2024 originations					300,000
Unfunded Loan Commitments [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Allowance for credit losses	5,500,000		5,500,000		5,800,000
Reserve for credit losses	0	1,700,000	(300,000)	1,800,000
Acquired acquisition-related provision for credit losses		500,000		500,000
Evans Bancorp, Inc [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Loans purchased with credit deterioration					336,400,000
Allowance for credit losses on loans purchased					7,700,000
Accrued Interest Receivable [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Allowance for credit losses	$ 0		$ 0		$ 0
Financing Receivable, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Other assets		Other assets		Other assets
AIR on loans	$ 42,000,000		$ 42,000,000		$ 42,500,000
Residential [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Allowance for credit losses	$ 32,131,000	33,310,000	32,131,000	33,310,000	33,692,000	$ 31,457,000	$ 26,574,000	$ 26,560,000
Allowance for credit losses on loans purchased			82,000		234,000
Amount of loans purchased			$ 7,700,000		$ 21,300,000
Premium on loans purchased			4.50%		4.50%
Residential [Member] \| Term Extension [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Financing receivables with payment default that were modified to borrowers experiencing financial difficulty		$ 11,000		$ 69,000

Allowance for Credit Losses and Credit Quality of Loans - Past due and Nonperforming Loans by Loan Class (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	$ 11,874,081	$ 11,598,114
Nonaccrual	62,898	44,592
31-60 Days Past Due Accruing [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	52,615	26,696
61-90 Days Past Due Accruing [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	19,875	9,873
Greater Than 90 Days Past Due Accruing [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	2,410	7,131
Past Due [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	74,900	43,700
Current [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	11,736,283	11,509,822
C&I [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	1,731,312	1,648,731
CRE [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	4,711,294	4,620,001
Auto [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	1,430,056	1,317,365
Residential Solar [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	693,177	736,970
Other Consumer [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	76,684	82,893
Commercial Loans [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	6,442,606	6,268,732
Nonaccrual	40,559	19,934
Commercial Loans [Member] \| 31-60 Days Past Due Accruing [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	27,815	2,563
Commercial Loans [Member] \| 61-90 Days Past Due Accruing [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	13,074	5,238
Commercial Loans [Member] \| Greater Than 90 Days Past Due Accruing [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	0	2,220
Commercial Loans [Member] \| Past Due [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	40,889	10,021
Commercial Loans [Member] \| Current [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	6,361,158	6,238,777
Commercial Loans [Member] \| C&I [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	1,731,312	1,648,731
Nonaccrual	10,051	1,947
Commercial Loans [Member] \| C&I [Member] \| 31-60 Days Past Due Accruing [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	1,549	761
Commercial Loans [Member] \| C&I [Member] \| 61-90 Days Past Due Accruing [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	676	126
Commercial Loans [Member] \| C&I [Member] \| Greater Than 90 Days Past Due Accruing [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	0	103
Commercial Loans [Member] \| C&I [Member] \| Past Due [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	2,225	990
Commercial Loans [Member] \| C&I [Member] \| Current [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	1,719,036	1,645,794
Commercial Loans [Member] \| CRE [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	4,711,294	4,620,001
Nonaccrual	30,508	17,987
Commercial Loans [Member] \| CRE [Member] \| 31-60 Days Past Due Accruing [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	26,266	1,802
Commercial Loans [Member] \| CRE [Member] \| 61-90 Days Past Due Accruing [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	12,398	5,112
Commercial Loans [Member] \| CRE [Member] \| Greater Than 90 Days Past Due Accruing [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	0	2,117
Commercial Loans [Member] \| CRE [Member] \| Past Due [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	38,664	9,031
Commercial Loans [Member] \| CRE [Member] \| Current [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	4,642,122	4,592,983
Consumer Loans [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	2,199,917	2,137,228
Nonaccrual	2,849	3,093
Consumer Loans [Member] \| 31-60 Days Past Due Accruing [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	16,408	18,930
Consumer Loans [Member] \| 61-90 Days Past Due Accruing [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	4,411	3,969
Consumer Loans [Member] \| Greater Than 90 Days Past Due Accruing [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	1,729	2,545
Consumer Loans [Member] \| Past Due [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	22,548	25,444
Consumer Loans [Member] \| Current [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	2,174,520	2,108,691
Consumer Loans [Member] \| Auto [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	1,430,056	1,317,365
Nonaccrual	2,677	2,940
Consumer Loans [Member] \| Auto [Member] \| 31-60 Days Past Due Accruing [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	12,082	12,884
Consumer Loans [Member] \| Auto [Member] \| 61-90 Days Past Due Accruing [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	2,183	2,106
Consumer Loans [Member] \| Auto [Member] \| Greater Than 90 Days Past Due Accruing [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	590	965
Consumer Loans [Member] \| Auto [Member] \| Past Due [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	14,855	15,955
Consumer Loans [Member] \| Auto [Member] \| Current [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	1,412,524	1,298,470
Consumer Loans [Member] \| Residential Solar [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	693,177	736,970
Nonaccrual	55	90
Consumer Loans [Member] \| Residential Solar [Member] \| 31-60 Days Past Due Accruing [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	3,525	4,846
Consumer Loans [Member] \| Residential Solar [Member] \| 61-90 Days Past Due Accruing [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	1,763	1,396
Consumer Loans [Member] \| Residential Solar [Member] \| Greater Than 90 Days Past Due Accruing [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	934	1,241
Consumer Loans [Member] \| Residential Solar [Member] \| Past Due [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	6,222	7,483
Consumer Loans [Member] \| Residential Solar [Member] \| Current [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	686,900	729,397
Consumer Loans [Member] \| Other Consumer [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	76,684	82,893
Nonaccrual	117	63
Consumer Loans [Member] \| Other Consumer [Member] \| 31-60 Days Past Due Accruing [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	801	1,200
Consumer Loans [Member] \| Other Consumer [Member] \| 61-90 Days Past Due Accruing [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	465	467
Consumer Loans [Member] \| Other Consumer [Member] \| Greater Than 90 Days Past Due Accruing [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	205	339
Consumer Loans [Member] \| Other Consumer [Member] \| Past Due [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	1,471	2,006
Consumer Loans [Member] \| Other Consumer [Member] \| Current [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	75,096	80,824
Residential [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	3,231,558	3,192,154
Nonaccrual	19,490	21,565
Residential [Member] \| 31-60 Days Past Due Accruing [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	8,392	5,203
Residential [Member] \| 61-90 Days Past Due Accruing [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	2,390	666
Residential [Member] \| Greater Than 90 Days Past Due Accruing [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	681	2,366
Residential [Member] \| Past Due [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	11,463	8,235
Residential [Member] \| Current [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Recorded total loans	$ 3,200,605	$ 3,162,354

Consolidated Statements of Changes in Stockholders' Equity (unaudited) (Parentheticals) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Statement [Line Items]
Cash dividends - per share (in Dollars per share)	$ 0.37	$ 0.34	$ 0.74	$ 0.68
Purchase of treasury shares (in Shares)	68,595		318,595
Net issuance of shares to employee and other stock plans (in Shares)	13,933	13,218	70,624	74,107
Issuance of common stock for acquisition (in Shares)		5,108,663		5,108,663

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

- Definition

Number of shares of stock issued during the period pursuant to acquisitions.

+ References

+ Details

- Definition

Number of shares that have been repurchased during the period and are being held in treasury.

+ References

+ Details

Securities

6 Months Ended

Jun. 30, 2026

Securities [Abstract]

Securities

5. Securities

The amortized cost, estimated fair value and unrealized gains (losses) of AFS securities are as follows:


	Amortized		Unrealized		Unrealized			Estimated
(In thousands)	Cost		Gains		Losses			Fair Value
As of June 30, 2026
U.S. treasury	$	104,422	$	-	$	(2,664	)	$	101,758
Federal agency		248,293		-		(17,164	)		231,129
State & municipal		84,796		2		(3,676	)		81,122
Mortgage-backed:
Government-sponsored enterprises		589,968		506		(26,580	)		563,894
U.S. government agency securities		175,232		275		(4,566	)		170,941
Collateralized mortgage obligations:
Government-sponsored enterprises		625,419		1,504		(28,390	)		598,533
U.S. government agency securities		260,288		453		(23,626	)		237,115
Corporate		22,500		-		(786	)		21,714
Total AFS securities	$	2,110,918	$	2,740	$	(107,452	)	$	2,006,206
As of December 31, 2025
U.S. treasury	$	79,330	$	25	$	(2,533	)	$	76,822
Federal agency		248,312		-		(17,036	)		231,276
State & municipal		90,654		4		(3,931	)		86,727
Mortgage-backed:
Government-sponsored enterprises		470,606		1,651		(23,532	)		448,725
U.S. government agency securities		145,836		660		(3,659	)		142,837
Collateralized mortgage obligations:
Government-sponsored enterprises		653,512		2,137		(26,214	)		629,435
U.S. government agency securities		247,908		335		(22,192	)		226,051
Corporate		22,500		-		(1,535	)		20,965
Total AFS securities	$	1,958,658	$	4,812	$	(100,632	)	$	1,862,838

There was no allowance for credit losses on AFS securities as of June 30, 2026 and December 31, 2025.

During the three and six months ended June 30, 2026 and 2025, there were no gains or losses reclassified out of accumulated other comprehensive income (loss) (“AOCI”) and into earnings.

The amortized cost, estimated fair value and unrealized gains (losses) of HTM securities are as follows:


	Amortized		Unrealized		Unrealized			Estimated
(In thousands)	Cost		Gains		Losses			Fair Value
As of June 30, 2026
Federal agency	$	100,000	$	-	$	(11,268	)	$	88,732
Mortgage-backed:
Government-sponsored enterprises		179,456		-		(23,892	)		155,564
U.S. government agency securities		12,021		-		(176	)		11,845
Collateralized mortgage obligations:
Government-sponsored enterprises		127,009		72		(6,394	)		120,687
U.S. government agency securities		55,640		-		(9,073	)		46,567
State & municipal		280,960		56		(11,722	)		269,294
Total HTM securities	$	755,086	$	128	$	(62,525	)	$	692,689
As of December 31, 2025
Federal agency	$	100,000	$	-	$	(10,705	)	$	89,295
Mortgage-backed:
Government-sponsored enterprises		188,942		-		(23,273	)		165,669
U.S. government agency securities		13,659		1		(106	)		13,554
Collateralized mortgage obligations:
Government-sponsored enterprises		136,464		115		(5,293	)		131,286
U.S. government agency securities		57,309		-		(9,396	)		47,913
State & municipal		266,382		76		(11,598	)		254,860
Total HTM securities	$	762,756	$	192	$	(60,371	)	$	702,577

At June 30, 2026 and December 31, 2025 all of the mortgage-backed HTM securities were comprised of U.S. government agency and government-sponsored enterprises securities.

The Company recorded no gains from calls on HTM securities for the three and six months ended June 30, 2026 and 2025.

AFS and HTM securities with amortized costs totaling $1.80 billion at June 30, 2026 and $1.87 billion at December 31, 2025, were pledged to secure public deposits and for other purposes required or permitted by law. Additionally, at June 30, 2026 and December 31, 2025, AFS and HTM securities with an amortized cost of $209.6 million and $207.6 million, respectively, were pledged as collateral for securities sold under repurchase agreements.

The following tables set forth information with regard to gains and (losses) on equity securities:


	Three Months Ended
	June 30,
(In thousands)		2026		2025
Net gains (losses) recognized on equity securities	$	175	$	112
Less: Net gains (losses) recognized on equity securities sold during the period		-		(35	)
Unrealized gains (losses) recognized on equity securities still held	$	175	$	147


	Six Months Ended
	June 30,
(In thousands)		2026		2025
Net gains (losses) recognized on equity securities	$	617	$	8
Less: Net gains (losses) recognized on equity securities sold during the period		-		(35	)
Unrealized gains (losses) recognized on equity securities still held	$	617	$	43

As of June 30, 2026 and December 31, 2025, the carrying value of equity securities without readily determinable fair values was $1.0 million. The Company performed a qualitative assessment to determine whether the investments were impaired and identified no areas of credit concern as of June 30, 2026 and 2025. There were no impairments, or downward or upward adjustments recognized for equity securities without readily determinable fair values during the three and six months ended June 30, 2026 and 2025.

The following table sets forth information with regard to contractual maturities of debt securities at June 30, 2026:


	Amortized		Estimated
(In thousands)	Cost		Fair Value
AFS debt securities:
Within one year	$	79,941	$	78,871
From one to five years		688,941		656,741
From five to ten years		303,675		284,892
After ten years		1,038,361		985,702
Total AFS debt securities	$	2,110,918	$	2,006,206
HTM debt securities:
Within one year	$	122,217	$	122,161
From one to five years		222,517		206,822
From five to ten years		93,543		85,389
After ten years		316,809		278,317
Total HTM debt securities	$	755,086	$	692,689

Maturities of mortgage-backed, collateralized mortgage obligations and asset-backed securities are stated based on their estimated average lives. Actual maturities may differ from estimated average lives or contractual maturities because, in certain cases, borrowers have the right to call or prepay obligations, with or without call or prepayment penalties.

Except for U.S. government securities and government-sponsored enterprises securities, there were no holdings, when taken in the aggregate, of any single issuer that exceeded 10% of consolidated stockholders’ equity at June 30, 2026 and December 31, 2025.








	Less Than 12 Months							12 Months or Longer							Total
						Number							Number							Number
	Fair		Unrealized			of		Fair		Unrealized			of		Fair		Unrealized			of
(In thousands)	Value		Losses			Positions		Value		Losses			Positions		Value		Losses			Positions
As of June 30, 2026
AFS securities:
U.S. treasury	$	29,700	$	(237	)		3	$	72,058	$	(2,427	)		4	$	101,758	$	(2,664	)		7
Federal agency		-		-			-		231,129		(17,164	)		16		231,129		(17,164	)		16
State & municipal		-		-			-		80,364		(3,676	)		59		80,364		(3,676	)		59
Mortgage-backed		317,746		(3,411	)		41		311,311		(27,735	)		126		629,057		(31,146	)		167
Collateralized mortgage obligations		197,645		(2,683	)		28		376,126		(49,333	)		100		573,771		(52,016	)		128
Corporate		-		-			-		21,714		(786	)		7		21,714		(786	)		7
Total securities with unrealized losses	$	545,091	$	(6,331	)		72	$	1,092,702	$	(101,121	)		312	$	1,637,793	$	(107,452	)		384
HTM securities:
Federal agency	$	-	$	-			-	$	88,732	$	(11,268	)		4	$	88,732	$	(11,268	)		4
Mortgage-backed		9,878		(143	)		3		157,509		(23,925	)		33		167,387		(24,068	)		36
Collateralized mortgage obligation		5,576		(72	)		1		156,717		(15,395	)		46		162,293		(15,467	)		47
State & municipal		16,562		(514	)		19		120,834		(11,208	)		121		137,396		(11,722	)		140
Total securities with unrealized losses	$	32,016	$	(729	)		23	$	523,792	$	(61,796	)		204	$	555,808	$	(62,525	)		227
As of December 31, 2025
AFS securities:
U.S. treasury	$	-	$	-			-	$	71,796	$	(2,533	)		4	$	71,796	$	(2,533	)		4
Federal agency		-		-			-		231,276		(17,036	)		16		231,276		(17,036	)		16
State & municipal		-		-			-		85,965		(3,931	)		64		85,965		(3,931	)		64
Mortgage-backed		49,453		(161	)		7		338,370		(27,030	)		135		387,913		(27,191	)		142
Collateralized mortgage obligations		80,781		(131	)		12		418,983		(48,275	)		105		499,764		(48,406	)		117
Corporate		-		-			-		20,965		(1,535	)		7		20,965		(1,535	)		7
Total securities with unrealized losses	$	130,234	$	(292	)		19	$	1,167,355	$	(100,340	)		331	$	1,297,679	$	(100,632	)		350
HTM securities:
Federal agency	$	-	$	-			-	$	89,295	$	(10,705	)		4	$	89,295	$	(10,705	)		4
Mortgage-backed		10,771		(71	)		1		168,422		(23,308	)		33		179,193		(23,379	)		34
Collateralized mortgage obligations		-		-			-		173,333		(14,689	)		47		173,333		(14,689	)		47
State & municipal		4,381		(245	)		7		142,139		(11,353	)		146		146,520		(11,598	)		153
Total securities with unrealized losses	$	15,152	$	(316	)		8	$	573,189	$	(60,055	)		230	$	588,341	$	(60,371	)		238

The Company does not believe the AFS securities that were in an unrealized loss position as of June 30, 2026 and December 31, 2025, which consisted of 384 and 350 individual securities, respectively, represented a credit loss impairment. AFS debt securities in unrealized loss positions are evaluated for impairment related to credit losses at least quarterly. As of June 30, 2026 and December 31, 2025, the majority of the AFS securities in an unrealized loss position consisted of debt securities issued by U.S. government agencies or U.S. government-sponsored enterprises that carry the explicit and/or implicit guarantee of the U.S. government, which are widely recognized as “risk-free” and have a long history of zero credit losses. Total gross unrealized losses were primarily attributable to changes in interest rates, relative to when the investment securities were purchased, and not due to the credit quality of the investment securities. The Company does not intend to sell, nor is it more likely than not that the Company will be required to sell the securities before recovery of their amortized cost bases, which may be at maturity. The Company elected to exclude accrued interest receivable (“AIR”) from the amortized cost basis of debt securities. AIR on AFS debt securities totaled $6.5 million and $5.6 million at June 30, 2026 and December 31, 2025, respectively, and is excluded from the estimate of credit losses and reported in the other assets financial statement line.

None of the Bank’s HTM debt securities were past due or on nonaccrual status as of June 30, 2026 and December 31, 2025. There was no accrued interest reversed against interest income for the three and six months ended June 30, 2026 or the year ended December 31, 2025 as all securities remained in accrual status. In addition, there were no collateral-dependent HTM debt securities as of June 30, 2026 and December 31, 2025. There was no allowance for credit losses on HTM securities as of June 30, 2026 and December 31, 2025. As of June 30, 2026 and December 31, 2025, 63% and 65%, respectively, of the Company’s HTM debt securities were issued by U.S. government agencies or U.S. government-sponsored enterprises with bond ratings of A to AAA. These securities carry the explicit and/or implicit guarantee of the U.S. government, which are widely recognized as “risk-free” and have a long history of zero credit losses. Therefore, the Company did not record an allowance for credit losses for these securities as of June 30, 2026 and December 31, 2025. The remaining HTM debt securities at June 30, 2026 and December 31, 2025 were comprised of state and municipal obligations with bond ratings of A to AAA excluding the $113.9 million and $85.7 million, respectively, of local municipal bonds which are not rated. Based on the Company’s current expected credit losses (“CECL”) methodology, the expected credit loss on the HTM municipal bond portfolio was deemed immaterial, therefore no allowance for credit loss was recorded as of June 30, 2026 and December 31, 2025. AIR on HTM debt securities totaled $4.0 million at June 30, 2026 and $3.9 million at December 31, 2025 and is excluded from the estimate of credit losses and reported in the other assets financial statement line.

Commitments and Contingencies (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2026	Dec. 31, 2025
Commitments and Contingencies [Abstract]
Obligation instrument term	1 year
Commitment to Extend Credits and Unused Lines of Credit [Member]
Commitments and Contingencies [Abstract]
Commitments - maximum potential obligation	$ 3,590.0	$ 3,400.0
Standby Letters of Credit [Member]
Commitments and Contingencies [Abstract]
Commitments - maximum potential obligation	$ 63.5	$ 58.5

Allowance for Credit Losses and Credit Quality of Loans - Amortized Cost Basis of Loans Modified to Borrowers Experiencing Financial Difficulty (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Term Extension [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Amortized cost	$ 602	$ 117	$ 1,246	$ 894
Combination - Term Extension and Interest Rate Reduction [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Amortized cost		28		28
Consumer Loans [Member] \| Term Extension [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Amortized cost	9		9
Consumer Loans [Member] \| Auto [Member] \| Term Extension [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Amortized cost	$ 9		$ 9
% of total class of financing receivables	0.001%		0.001%
Residential [Member] \| Term Extension [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Amortized cost	$ 593	$ 117	$ 1,237	$ 894
% of total class of financing receivables	0.018%	0.004%	0.038%	0.028%
Residential [Member] \| Combination - Term Extension and Interest Rate Reduction [Member]
Allowance for Credit Losses and Credit Quality of Loans [Abstract]
Amortized cost		$ 28		$ 28
% of total class of financing receivables		0.001%		0.001%

Accounting Policies, by Policy (Policies)

6 Months Ended

Jun. 30, 2026

Summary of Significant Accounting Policies [Abstract]

Nature of Operations

NBT Bancorp Inc. is a registered financial holding company incorporated in the state of Delaware in 1986, with its principal headquarters located in Norwich, New York. The principal assets of NBT Bancorp Inc. consist of all of the outstanding shares of common stock of its subsidiaries, including: NBT Bank, National Association (the “Bank”), NBT Financial Services, Inc. (“NBT Financial”), NBT Holdings, Inc. (“NBT Holdings”), CNBF Capital Trust I, NBT Statutory Trust I, NBT Statutory Trust II, Alliance Financial Capital Trust I, Alliance Financial Capital Trust II and Evans Capital Trust I (collectively, the “Trusts”). The principal sources of revenue for NBT Bancorp Inc. are the management fees and dividends it receives from the Bank, NBT Financial and NBT Holdings. Collectively, NBT Bancorp Inc. and its subsidiaries are referred to herein as (the “Company”).

The Company’s business, primarily conducted through the Bank, consists of providing commercial banking, retail banking and wealth management services primarily to customers in its market area, which includes upstate New York, northeastern Pennsylvania, southern New Hampshire, western Massachusetts, Vermont, southern Maine and central and northwestern Connecticut. The Company has been, and intends to remain, a community-oriented financial institution offering a variety of financial services. The Company’s business philosophy is to operate as a community bank with local decision-making, providing a broad array of banking and financial services to retail, commercial and municipal customers.

Basis of Presentation

The accompanying unaudited interim consolidated financial statements include the accounts of NBT Bancorp Inc. and its wholly-owned subsidiaries mentioned above. In the opinion of management, the interim data includes all adjustments, consisting only of normal recurring adjustments, necessary for a fair presentation of the results for the interim periods in accordance with U.S. generally accepted accounting principles (“GAAP”) and in accordance with the instructions for the Quarterly Report on Form 10-Q and Article 10 of Regulation S-X as promulgated by the Securities and Exchange Commission (“SEC”). Accordingly, the consolidated financial statements do not include all of the information and notes necessary for complete financial statements in conformity with GAAP. These unaudited interim consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in the Company’s 2025 Annual Report on Form 10-K. The results of operations for the interim periods are not necessarily indicative of the results that may be expected for the full year or any other interim period. All material intercompany transactions have been eliminated in consolidation. Amounts previously reported in the consolidated financial statements are reclassified whenever necessary to conform to current period presentation. The Company has evaluated subsequent events for potential recognition and/or disclosure, and none were identified.

Use of Estimates in the Preparation of Financial Statements

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts in the financial statements and accompanying notes. Actual results may differ from those estimates and such differences could be material to the financial statements. Estimates associated with the allowance for credit losses are particularly susceptible to material changes in the near term.

Recently Adopted Accounting Standards and Accounting Standards Issued Not Yet Adopted

Recently Adopted Accounting Standards

In November 2025, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2025-08, Financial Instruments-Credit Losses (Topic 326): Purchased Loans. The ASU expands the population of acquired financial assets subject to the gross-up approach in Topic 326, Financial Instrument-Credit Losses. In accordance with the amendments in this update, loans acquired without credit deterioration and deemed seasoned are purchased seasoned loans and accounted for using the gross-up approach at acquisition. The amendments apply prospectively and will be effective for fiscal periods beginning after December 15, 2026. The Company elected to early-adopt the ASU as of January 1, 2026.

Accounting Standards Issued Not Yet Adopted

In November 2024, the FASB issued ASU 2024-03, Income Statement-Reporting Comprehensive Income-Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses, that addresses longstanding investor requests for more information regarding expenses included in the expense captions presented on the face of the income statement. The ASU will require a tabular disclosure that disaggregates certain income statement expenses including employee compensation, depreciation and intangible asset amortization. In January 2025, the FASB issued ASU 2025-01, Income Statement-Reporting Comprehensive Income-Expense Disaggregation Disclosures (Subtopic 220-40): Clarifying the Effective Date, which revises the effective date of ASU 2024-03. The ASU will become effective in the annual reporting periods beginning after December 15, 2026, and early adoption is permitted. Aside from complying with the new disclosure requirements, the adoption is not expected to have a material impact on the consolidated financial statements.

In December 2025, the FASB issued ASU 2025-11, Interim Reporting (Topic 270): Narrow-Scope Improvements, which clarifies the guidance in Topic 270 to improve the consistency of interim financial reporting. The ASU provides a comprehensive list of required interim disclosures and introduces a disclosure principle requiring entities to disclose events since the end of the last annual reporting period that have a material impact on the entity. ASU 2025-11 is effective for fiscal years beginning after December 15, 2027, including interim periods within those fiscal years, with early adoption permitted. Aside from complying with the new disclosure requirements, the adoption is not expected to have a material impact on the consolidated financial statements.

Investment, Policy

Allowance for Credit Losses

Loan Modifications to Borrowers Experiencing Financial Difficulties

Postemployment Benefit Plans, Policy

The Company has a qualified, noncontributory, defined benefit pension plan (the “Plan”) covering substantially all of its employees at June 30, 2026. Benefits paid from the Plan are based on age, years of service, compensation and social security benefits and are determined in accordance with defined formulas. The Company’s policy is to fund the Plan in accordance with Employee Retirement Income Security Act of 1974 standards. Assets of the Plan are invested in publicly traded stocks, bonds and mutual funds. In addition to the Plan, the Company provides supplemental employee retirement plans to certain current and former executives. These supplemental employee retirement plans and the Plan are collectively referred to herein as “Pension Benefits.”

In addition, the Company provides certain health care benefits for retired employees. Benefits were accrued over the employees’ active service period. Only employees that were employed by the Company on or before January 1, 2000 are eligible to receive post-retirement health care benefits. These post-retirement benefits are referred to herein as “Other Benefits.”

In connection with the Evans acquisition, the Company assumed the non-contributory, qualified, defined benefit pension plan and the nonqualified supplemental executive retirement plans. Effective May 2, 2025, the Evans defined benefit pension plan was merged into the Plan. The merging of the plans required a valuation as of the merger date and resulted in a $0.9 million adjustment to AOCI. The merging of the plans did not have a significant impact on the Company’s financial statements and related footnotes.

Accounting standards require an employer to: (1) recognize the overfunded or underfunded status of defined benefit post-retirement plans, which is measured as the difference between plan assets at fair value and the benefit obligation, as an asset or liability in its balance sheet; (2) recognize changes in that funded status in the year in which the changes occur through comprehensive income; and (3) measure the defined benefit plan assets and obligations as of the date of its year-end balance sheet.

Earnings Per Share

Fair Value of Financial Instruments, Policy

Level 1 - Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities;

Level 3 - Prices or valuation techniques that require inputs that are both significant to the fair value measurement and unobservable (i.e., supported by little or no market activity).

A financial instrument’s level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement.


(In thousands)	Level 1		Level 2		Level 3		June 30, 2026
Assets:
AFS securities:
U.S. treasury	$	101,758	$	-	$	-	$	101,758
Federal agency		-		231,129		-		231,129
State & municipal		-		81,122		-		81,122
Mortgage-backed		-		734,835		-		734,835
Collateralized mortgage obligations		-		835,648		-		835,648
Corporate		-		21,714		-		21,714
Total AFS securities	$	101,758	$	1,904,448	$	-	$	2,006,206
Equity securities		49,732		1,000		-		50,732
Derivatives		-		54,699		-		54,699
Total	$	151,490	$	1,960,147	$	-	$	2,111,637
Liabilities:
Derivatives	$	-	$	72,053	$	-	$	72,053
Total	$	-	$	72,053	$	-	$	72,053


(In thousands)	Level 1		Level 2		Level 3		December 31, 2025
Assets:
AFS securities:
U.S. treasury	$	76,822	$	-	$	-	$	76,822
Federal agency		-		231,276		-		231,276
State & municipal		-		86,727		-		86,727
Mortgage-backed		-		591,562		-		591,562
Collateralized mortgage obligations		-		855,486		-		855,486
Corporate		-		20,965		-		20,965
Total AFS securities	$	76,822	$	1,786,016	$	-	$	1,862,838
Equity securities		47,760		1,000		-		48,760
Derivatives		-		52,104		-		52,104
Total	$	124,582	$	1,839,120	$	-	$	1,963,702
Liabilities:
Derivatives	$	-	$	68,066	$	-	$	68,066
Total	$	-	$	68,066	$	-	$	68,066


			June 30, 2026				December 31, 2025
	Fair Value		Carrying		Estimated		Carrying		Estimated
(In thousands)	Hierarchy		Amount		Fair Value		Amount		Fair Value
Financial assets:
HTM securities		2	$	755,086	$	692,689	$	762,756	$	702,577
Net loans		3		11,733,581		11,528,110		11,461,222		11,337,753
Financial liabilities:
Time deposits		2	$	1,328,884	$	1,315,245	$	1,492,445	$	1,484,165
Long-term debt		2		43,043		42,965		43,176		43,395
Subordinated debt		1		-		-		24,509		24,016
Junior subordinated debt		2		111,714		97,775		111,668		98,841

Long-Term Debt - The fair value of long-term debt was estimated using a discounted cash flow approach that applies prevailing market interest rates for similar maturity instruments.

Subordinated Debt - The fair value of subordinated debt has been measured using the observable market price as of the period reported.

Junior Subordinated Debt - The fair value of junior subordinated debt has been estimated using a discounted cash flow analysis.

Borrowings - Subordinated Debt (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Jun. 30, 2026
Borrowings [Abstract]
Unamortized debt issuance costs and unamortized fair value discount	$ (491)	$ 0
Total subordinated debt, net	24,509	0
Subordinated notes issued March 31, 2021 [Member]
Borrowings [Abstract]
Subordinated notes	$ 25,000	$ 0
Debt instrument, rate on fixed portion	3.50%
Term of variable rate basis	3 months
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]	us-gaap:SecuredOvernightFinancingRateSofrMember
Basis spread on variable rate	2.80%

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

- Definition

Amount of unamortized debt discount (premium) and debt issuance costs.

+ References + Details

Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2026

Earnings Per Share [Abstract]

Reconciliation of Basic and Diluted Earnings Per Share

The following is a reconciliation of basic and diluted EPS for the periods presented in the unaudited interim consolidated statements of income:


	Three Months Ended
	June 30,
(In thousands)		2026		2025
Basic EPS:
Weighted average common shares outstanding			51,981		50,575
Net income available to common stockholders		$	53,030	$	22,510
Basic EPS		$	1.02	$	0.45
Diluted EPS:
Weighted average common shares outstanding			51,981		50,575
Dilutive effect of common stock options and restricted stock			258		212
Weighted average common shares and common share equivalents			52,239		50,787
Net income available to common stockholders		$	53,030	$	22,510
Diluted EPS		$	1.02	$	0.44


	Six Months Ended
		June 30,
(In thousands)		2026		2025
Basic EPS:
Weighted average common shares outstanding			52,052		48,919
Net income available to common stockholders		$	104,172	$	59,255
Basic EPS		$	2.00	$	1.21
Diluted EPS:
Weighted average common shares outstanding			52,052		48,919
Dilutive effect of common stock options and restricted stock			238		224
Weighted average common shares and common share equivalents			52,290		49,143
Net income available to common stockholders		$	104,172	$	59,255
Diluted EPS		$	1.99	$	1.21

Borrowings (Tables)

6 Months Ended

Jun. 30, 2026

Borrowings [Abstract]

Information related to short-term borrowings is summarized as follows:


(In thousands)	June 30, 2026		December 31, 2025
Federal funds purchased	$	40,000	$	-
Securities sold under repurchase agreements		119,438		148,069
Other short-term borrowings		157,000		-
Total short-term borrowings	$	316,438	$	148,069

Subordinated Debt

The following table summarizes the Company’s subordinated debt:


(Dollars in thousands)	June 30, 2026		December 31, 2025
Subordinated notes issued March 2021 and acquired August 2023 - fixed interest rate of 3.50% through June 2026 and a variable interest rate equivalent to three-month SOFR plus 2.80% thereafter, maturing March 31, 2031	$	-	$	25,000
Unamortized debt issuance costs and unamortized fair value discount		-		(491	)
Total subordinated debt, net	$	-	$	24,509

Borrowings - Information Related to Short-term Borrowings (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Borrowings [Abstract]
Short-term borrowings	$ 316,438	$ 148,069
Federal Funds Purchased [Member]
Borrowings [Abstract]
Short-term borrowings	40,000	0
Securities Sold Under Repurchase Agreements [Member]
Borrowings [Abstract]
Short-term borrowings	119,438	148,069
Other Short Term Borrowings [Member]
Borrowings [Abstract]
Short-term borrowings	$ 157,000	$ 0

- Definition

Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

+ References + Details

Acquisitions (Details) - Evans Bancorp, Inc [Member] $ in Thousands, shares in Millions		3 Months Ended		6 Months Ended	12 Months Ended
	May 02, 2025 USD ($) shares	Dec. 31, 2025 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2025 USD ($)	Dec. 31, 2024 USD ($) Location
Acquisitions [Abstract]
Total consideration paid	$ 221,792
Assets of the acquiree					$ 2,190,000
Number of banking locations operated by acquiree (in Location) \| Location					18
Common stock issued (in Shares) \| shares	5.1
Total identifiable assets, net	$ 131,177
Preliminary goodwill	91,400
Decrease in goodwill		$ (800)
Goodwill	90,615
Allowance for credit losses on non-PCD loans	13,000
Fair value of non-PCD loans at acquisition	1,370,000
Non-PCD loan gross contractual receivable	$ 1,430,000
Merger and acquisition integration related expenses			$ 17,200	$ 18,400

Defined Benefit Post-Retirement Plans

6 Months Ended

Jun. 30, 2026

Defined Benefit Post-Retirement Plans [Abstract]

Defined Benefit Post-Retirement Plans

9. Defined Benefit Post-Retirement Plans

The Company made no voluntary contributions to the Pension Benefits and Other Benefits plans during the three and six months ended June 30, 2026 and 2025.

The components of expense for Pension Benefits and Other Benefits are set forth below:


	Pension Benefits							Other Benefits
	Three Months Ended June 30,							Three Months Ended June 30,
(In thousands)		2026			2025				2026		2025
Components of net periodic (benefit) cost:
Service cost		$	671		$	676			$	-	$	1
Interest cost			1,164			1,137				58		59
Expected return on plan assets			(2,312	)		(2,091	)			-		-
Net amortization			32			308				-		(1	)
Total net periodic (benefit) cost		$	(445	)	$	30			$	58	$	59


	Pension Benefits							Other Benefits
	Six Months Ended June 30,							Six Months Ended June 30,
(In thousands)		2026			2025				2026			2025
Components of net periodic (benefit) cost:
Service cost		$	1,343		$	1,369			$	1		$	2
Interest cost			2,329			2,206				116			118
Expected return on plan assets			(4,625	)		(4,136	)			-			-
Net amortization			65			633				(1	)		(2	)
Total net periodic (benefit) cost		$	(888	)	$	72			$	116		$	118

The service cost component of the net periodic (benefit) cost is included in salaries and employee benefits and the interest cost, expected return on plan assets and net amortization components are included in other noninterest expense on the unaudited interim consolidated statements of income.

- Definition

The entire disclosure for retirement benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (o)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (p)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (q)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 60
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480266/715-60-50-3

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480126/715-20-S99-2

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 70
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480794/715-70-50-1

Reference 7: http://www.xbrl.org/2003/role/exampleRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480482/715-20-55-17

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)(iv)(03)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (l)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/715/tableOfContent

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)(iii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (r)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (r)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

+ Details

Fair Value Measurements and Fair Value of Financial Instruments - Fair Value of Financial Assets and Liabilities Measured on a Recurring Basis (Details) - Recurring Basis [Member] - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
AFS securities:
AFS securities	$ 2,006,206	$ 1,862,838
Equity securities	50,732	48,760
Derivatives	54,699	52,104
Total	2,111,637	1,963,702
Liabilities:
Derivatives	72,053	68,066
Total	72,053	68,066
Level 1 [Member]
AFS securities:
AFS securities	101,758	76,822
Equity securities	49,732	47,760
Derivatives	0	0
Total	151,490	124,582
Liabilities:
Derivatives	0	0
Total	0	0
Level 2 [Member]
AFS securities:
AFS securities	1,904,448	1,786,016
Equity securities	1,000	1,000
Derivatives	54,699	52,104
Total	1,960,147	1,839,120
Liabilities:
Derivatives	72,053	68,066
Total	72,053	68,066
Level 3 [Member]
AFS securities:
AFS securities	0	0
Equity securities	0	0
Derivatives	0	0
Total	0	0
Liabilities:
Derivatives	0	0
Total	0	0
U.S. Treasury [Member]
AFS securities:
AFS securities	101,758	76,822
U.S. Treasury [Member] \| Level 1 [Member]
AFS securities:
AFS securities	101,758	76,822
U.S. Treasury [Member] \| Level 2 [Member]
AFS securities:
AFS securities	0	0
U.S. Treasury [Member] \| Level 3 [Member]
AFS securities:
AFS securities	0	0
Federal Agency [Member]
AFS securities:
AFS securities	231,129	231,276
Federal Agency [Member] \| Level 1 [Member]
AFS securities:
AFS securities	0	0
Federal Agency [Member] \| Level 2 [Member]
AFS securities:
AFS securities	231,129	231,276
Federal Agency [Member] \| Level 3 [Member]
AFS securities:
AFS securities	0	0
State & Municipal [Member]
AFS securities:
AFS securities	81,122	86,727
State & Municipal [Member] \| Level 1 [Member]
AFS securities:
AFS securities	0	0
State & Municipal [Member] \| Level 2 [Member]
AFS securities:
AFS securities	81,122	86,727
State & Municipal [Member] \| Level 3 [Member]
AFS securities:
AFS securities	0	0
Mortgage-Backed [Member]
AFS securities:
AFS securities	734,835	591,562
Mortgage-Backed [Member] \| Level 1 [Member]
AFS securities:
AFS securities	0	0
Mortgage-Backed [Member] \| Level 2 [Member]
AFS securities:
AFS securities	734,835	591,562
Mortgage-Backed [Member] \| Level 3 [Member]
AFS securities:
AFS securities	0	0
Collateralized Mortgage Obligations [Member]
AFS securities:
AFS securities	835,648	855,486
Collateralized Mortgage Obligations [Member] \| Level 1 [Member]
AFS securities:
AFS securities	0	0
Collateralized Mortgage Obligations [Member] \| Level 2 [Member]
AFS securities:
AFS securities	835,648	855,486
Collateralized Mortgage Obligations [Member] \| Level 3 [Member]
AFS securities:
AFS securities	0	0
Corporate [Member]
AFS securities:
AFS securities	21,714	20,965
Corporate [Member] \| Level 1 [Member]
AFS securities:
AFS securities	0	0
Corporate [Member] \| Level 2 [Member]
AFS securities:
AFS securities	21,714	20,965
Corporate [Member] \| Level 3 [Member]
AFS securities:
AFS securities	$ 0	$ 0

Segment Reporting

6 Months Ended

Jun. 30, 2026

Segment Reporting [Abstract]

Segment Reporting

15. Segment Reporting

Management assesses its operating segment structure to enhance transparency in how financial performance is evaluated and resources are allocated by the chief operating decision maker (“CODM”). Segments are components of an enterprise that are regularly evaluated by the CODM to allocate resources and assess performance. The Company’s CODM is its Chief Executive Officer.

The Company has determined that it operates through two reportable segments:

Banking – Provides commercial banking, retail banking, and wealth management services primarily to customers in its market area, offering a broad array of banking and financial services to retail, commercial, and municipal customers. Included in Banking are the revenue and expenses from the wealth management business and the parent holding company. The parent company’s principal activities include the direct and indirect ownership of banking and non-banking subsidiaries, as well as the issuance of debt and equity. The parent company’s principal sources of revenue are the management fees and dividends it receives from its subsidiaries. Banking also includes corporate shared service costs such as the majority of equity compensation expense, as well as other general and administrative shared services costs including pension, retirement plan and supplemental retirement plan costs. Currently there is no allocation of these costs to other operating segments.

Retirement Plan Administration – Includes retirement plan and health savings account recordkeeping and administration, investment management, third-party administration, and actuarial services.

Our CODM reviews actual net income versus budgeted net income to assess segment performance and to make decisions about allocating capital and personnel to the segments. The CODM regularly receives expense information at a level consistent with that disclosed in the Company’s consolidated statements of income.

Reported segments and their financial information are not necessarily comparable to similar information reported by other financial institutions. Additionally, due to interrelationships among the various segments, the information presented is not indicative of how the segments would perform as independent entities. Changes in management structure, allocation methodologies, or procedures may result in future revisions to previously reported segment financial data. There have been no changes to the Company’s operating segments since those disclosed in the Company’s Annual Report on Form 10‑K for the year ended December 31, 2025. The Company will continue to evaluate its segment disclosures and make necessary adjustments as business operations evolve.

Information about reportable segments and reconciliation of the information to the consolidated financial statements follows:


	Three Months Ended June 30, 2026
(In thousands)		Banking		Retirement Plan Administration				All Other(1)			Consolidated
Net interest income		$	136,944	$	19		$	-		$	136,963
Provision for loan losses			6,136		-			-			6,136
Net interest income after provision for loan losses		$	130,808	$	19		$	-		$	130,827
Noninterest income
Service charges on deposit accounts		$	5,194	$	-		$	-		$	5,194
Card services income			6,613		-			-			6,613
Retirement plan administration fees			-		17,347			(419	)		16,928
Wealth management			10,345		600			3			10,948
Insurance services			-		-			4,177			4,177
Bank owned life insurance income			2,505		-			-			2,505
Net securities gains			175		-			-			175
Other			4,643		155			(1,611	)		3,187
Total noninterest income		$	29,475	$	18,102		$	2,150		$	49,727
Noninterest expense
Salaries and employee benefits		$	56,941	$	9,240		$	2,823		$	69,004
Technology and data services			11,411		270			169			11,850
Occupancy			9,183		224			68			9,475
Professional fees and outside services			5,380		687			(405	)		5,662
Office supplies and postage			1,961		78			21			2,060
FDIC assessment			1,984		-			-			1,984
Marketing			972		(41	)		6			937
Amortization of intangible assets			2,729		408			54			3,191
Loan collection and other real estate owned, net			544		-			-			544
Acquisition expenses			-		-			-			-
Other			8,078		280			(1,627	)		6,731
Total noninterest expense		$	99,183	$	11,146		$	1,109		$	111,438
Income before income tax expense		$	61,100	$	6,975		$	1,041		$	69,116
Income tax expense			14,604		1,482			-			16,086
Net income		$	46,496	$	5,493		$	1,041		$	53,030
Goodwill		$	414,865	$	23,877		$	14,536		$	453,278
Intangible assets, net			45,465		4,711			941			51,117
Total assets			18,192,349		47,189			(2,024,581	)		16,214,957

(1)


	Three Months Ended June 30, 2025
				Retirement
				Plan
(In thousands)		Banking		Administration		All Other(1)			Consolidated
Net interest income		$	124,202	$	18	$	-		$	124,220
Provision for loan losses			17,835		-		-			17,835
Net interest income after provision for loan losses		$	106,367	$	18	$	-		$	106,385
Noninterest income
Service charges on deposit accounts		$	4,578	$	-	$	-		$	4,578
Card services income			6,077		-		-			6,077
Retirement plan administration fees			-		16,081		(371	)		15,710
Wealth management			10,153		517		8			10,678
Insurance services			1		-		4,096			4,097
Bank owned life insurance income			2,180		-		-			2,180
Net securities gains			112		-		-			112
Other			5,018		145		(1,663	)		3,500
Total noninterest income		$	28,119	$	16,743	$	2,070		$	46,932
Noninterest expense
Salaries and employee benefits		$	52,659	$	8,700	$	2,796		$	64,155
Technology and data services			10,341		303		160			10,804
Occupancy			8,687		284		67			9,038
Professional fees and outside services			4,851		521		(351	)		5,021
Office supplies and postage			1,783		73		15			1,871
FDIC assessment			1,820		-		-			1,820
Marketing			952		21		1			974
Amortization of intangible assets			2,500		485		57			3,042
Loan collection and other real estate owned, net			489		-		-			489
Acquisition expenses			17,180		-		-			17,180
Other			9,684		274		(1,742	)		8,216
Total noninterest expense		$	110,946	$	10,661	$	1,003		$	122,610
Income before income tax expense		$	23,540	$	6,100	$	1,067		$	30,707
Income tax expense			6,917		1,280		-			8,197
Net income		$	16,623	$	4,820	$	1,067		$	22,510
Goodwill		$	415,659	$	23,877	$	14,536		$	454,072
Intangible assets, net			56,785		6,504		1,158			64,447
Total assets			18,013,397		48,642		(2,047,258	)		16,014,781

(1)


	Six Months Ended June 30, 2026
				Retirement
				Plan
(In thousands)		Banking		Administration			All Other (1)			Consolidated
Net interest income		$	271,275	$	36		$	-		$	271,311
Provision for loan losses			11,713		-			-			11,713
Net interest income after provision for loan losses		$	259,562	$	36		$	-		$	259,598
Noninterest income
Service charges on deposit accounts		$	10,462	$	-		$	-		$	10,462
Card services income			12,641		-			-			12,641
Retirement plan administration fees			-		34,319			(825	)		33,494
Wealth management			20,880		1,196			6			22,082
Insurance services			-		-			8,659			8,659
Bank owned life insurance income			5,164		-			-			5,164
Net securities gains			617		-			-			617
Other			11,105		306			(4,667	)		6,744
Total noninterest income		$	60,869	$	35,821		$	3,173		$	99,863
Noninterest expense
Salaries and employee benefits		$	113,800	$	18,131		$	5,832		$	137,763
Technology and data services			22,526		488			346			23,360
Occupancy			19,878		469			138			20,485
Professional fees and outside services			10,648		1,349			(781	)		11,216
Office supplies and postage			4,002		182			43			4,227
FDIC assessment			3,994		-			-			3,994
Marketing			1,864		(18	)		9			1,855
Amortization of intangible assets			5,574		857			108			6,539
Loan collection and other real estate owned, net			1,154		-			-			1,154
Acquisition expenses			-		-			-			-
Other			16,985		581			(4,489	)		13,077
Total noninterest expense		$	200,425	$	22,039		$	1,206		$	223,670
Income before income tax expense		$	120,006	$	13,818		$	1,967		$	135,791
Income tax expense			28,623		2,996			-			31,619
Net income		$	91,383	$	10,822		$	1,967		$	104,172
Goodwill		$	414,865	$	23,877		$	14,536		$	453,278
Intangible assets, net			45,465		4,711			941			51,117
Total assets			18,192,349		47,189			(2,024,581	)		16,214,957

(1)


	Six Months Ended June 30, 2025
					Retirement
					Plan
(In thousands)		Banking			Administration		All Other(1)			Consolidated
Net interest income		$	231,407	$	36	$	-		$	231,443
Provision for loan losses			25,389		-		-			25,389
Net interest income after provision for loan losses		$	206,018	$	36	$	-		$	206,054
Noninterest income
Service charges on deposit accounts		$	8,821	$	-	$	-		$	8,821
Card services income			11,394		-		-			11,394
Retirement plan administration fees			-		32,337		(769	)		31,568
Wealth management			20,490		1,115		19			21,624
Insurance services			1		-		8,857			8,858
Bank owned life insurance income			5,577		-		-			5,577
Net securities gains			8		-		-			8
Other			10,631		300		(4,397	)		6,534
Total noninterest income		$	56,922	$	33,752	$	3,710		$	94,384
Noninterest expense
Salaries and employee benefits		$	102,207	$	17,154	$	5,488		$	124,849
Technology and data services			20,142		573		327			21,042
Occupancy			17,379		552		134			18,065
Professional fees and outside services			9,666		1,025		(718	)		9,973
Office supplies and postage			3,664		120		29			3,813
FDIC assessment			3,514		-		-			3,514
Marketing			2,070		40		2			2,112
Amortization of intangible assets			4,008		1,029		116			5,153
Loan collection and other real estate owned, net			1,148		-		-			1,148
Acquisition expenses			18,401		-		-			18,401
Other			18,224		508		(4,292	)		14,440
Total noninterest expense		$	200,423	$	21,001	$	1,086		$	222,510
Income before income tax expense		$	62,517	$	12,787	$	2,624		$	77,928
Income tax expense			15,968		2,705		-			18,673
Net income		$	46,549	$	10,082	$	2,624		$	59,255
Goodwill		$	415,659	$	23,877	$	14,536		$	454,072
Intangible assets, net			56,785		6,504		1,158			64,447
Total assets			18,013,397		48,642		(2,047,258	)		16,014,781

(1)

- Definition

The entire disclosure for segment reporting.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 40
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-40

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 12: http://www.xbrl.org/2003/role/disclosureRef
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Reference 14: http://www.xbrl.org/2003/role/disclosureRef
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Reference 15: http://www.xbrl.org/2003/role/exampleRef
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+ Details

Consolidated Balance Sheets (unaudited) (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Consolidated Balance Sheets (unaudited) [Abstract]
Securities held to maturity fair value	$ 692,689	$ 702,577
Preferred stock, par value (in Dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in Shares)	2,500,000	2,500,000
Common stock, par value (in Dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in Shares)	100,000,000	100,000,000
Common stock, shares issued (in Shares)	59,083,155	59,083,155
Common stock in treasury, at cost (in Shares)	7,128,171	6,880,200

- Definition

Fair value of investment in debt security measured at amortized cost (held-to-maturity).

+ References

+ Details

- Definition

The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

+ References + Details

Borrowings

6 Months Ended

Jun. 30, 2026

Borrowings [Abstract]

Borrowings

8. Borrowings

Short-Term Borrowings

In addition to the liquidity provided by balance sheet cash flows, liquidity must also be supplemented with additional sources such as credit lines from correspondent banks as well as borrowings from the Federal Home Loan Bank (“FHLB”) and the Federal Reserve Bank. Other funding alternatives may also be appropriate from time to time, including wholesale and retail repurchase agreements and brokered certificate of deposit accounts.

Information related to short-term borrowings is summarized as follows:


(In thousands)	June 30, 2026		December 31, 2025
Federal funds purchased	$	40,000	$	-
Securities sold under repurchase agreements		119,438		148,069
Other short-term borrowings		157,000		-
Total short-term borrowings	$	316,438	$	148,069

See Note 5 for additional information regarding securities pledged as collateral for securities sold under the repurchase agreements.

Subordinated Debt

The subordinated notes assumed in connection with the Salisbury Bancorp, Inc. acquisition included $25.0 million of 3.50% fixed-to-floating rate subordinated notes due 2031. The subordinated notes, which qualified as Tier 2 capital, had a maturity date of March 31, 2031 and bore interest at an annual rate of 3.50%, payable quarterly in arrears commencing on June 30, 2021, and a floating rate of interest equivalent to the three-month Secured Overnight Financing Rate (“SOFR”) plus a spread of 2.80%, payable quarterly in arrears commencing on June 30, 2026. The subordinated notes were redeemable, without penalty, on or after March 31, 2026. On June 30, 2026, the Company redeemed these subordinated notes in full using existing liquidity sources.

The following table summarizes the Company’s subordinated debt:


(Dollars in thousands)	June 30, 2026		December 31, 2025
Subordinated notes issued March 2021 and acquired August 2023 - fixed interest rate of 3.50% through June 2026 and a variable interest rate equivalent to three-month SOFR plus 2.80% thereafter, maturing March 31, 2031	$	-	$	25,000
Unamortized debt issuance costs and unamortized fair value discount		-		(491	)
Total subordinated debt, net	$	-	$	24,509

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

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+ Details

Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Assets
Cash and due from banks	$ 187,164	$ 185,158
Short-term interest-bearing accounts	107,489	301,958
Equity securities, at fair value	50,732	48,760
Securities available for sale, at fair value	2,006,206	1,862,838
Securities held to maturity (fair value $692,689 and $702,577, respectively)	755,086	762,756
Federal Reserve and Federal Home Loan Bank stock	51,540	44,575
Loans held for sale	0	1,108
Loans	11,874,081	11,598,114
Less allowance for loan losses	140,500	138,000
Net loans	11,733,581	11,460,114
Premises and equipment, net	98,119	99,277
Goodwill	453,278	453,278
Intangible assets, net	51,117	57,656
Bank owned life insurance	314,806	317,733
Other assets	405,839	399,910
Total assets	16,214,957	15,995,121
Liabilities
Demand (noninterest bearing)	3,861,366	3,800,209
Savings, interest-bearing checking and money market	8,347,052	8,206,539
Time	1,328,884	1,492,445
Total deposits	13,537,302	13,499,193
Short-term borrowings	316,438	148,069
Long-term debt	43,043	43,176
Subordinated debt, net	0	24,509
Junior subordinated debt	111,714	111,668
Other liabilities	262,541	272,290
Total liabilities	14,271,038	14,098,905
Stockholders’ equity
Preferred stock, $0.01 par value, 2,500,000 shares authorized	0	0
Common stock, $0.01 par value, 100,000,000 shares authorized; 59,083,155 shares issued	591	591
Additional paid-in-capital	966,124	964,778
Retained earnings	1,262,559	1,196,850
Accumulated other comprehensive loss	(89,132)	(82,596)
Common stock in treasury, at cost, 7,128,171 and 6,880,200 shares, respectively	(196,223)	(183,407)
Total stockholders’ equity	1,943,919	1,896,216
Total liabilities and stockholders’ equity	$ 16,214,957	$ 15,995,121

Defined Benefit Post-Retirement Plans (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
	May 02, 2025	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Defined Benefit Post-Retirement Plans [Abstract]
Merging of plans adjustment to AOCI	$ 0.9
Employer contributions		$ 0.0	$ 0.0	$ 0.0	$ 0.0

- Definition

Amount of contribution received by defined benefit plan from employer which increases plan assets.

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+ Details

Reclassification Adjustments Out of Other Comprehensive Income (Loss) (Tables)

6 Months Ended

Jun. 30, 2026

Reclassification Adjustments Out of Other Comprehensive Income (Loss) [Abstract]

Reclassification Adjustments out of AOCI

The following table summarizes the reclassification adjustments out of AOCI:


Detail About AOCI Components		Amount Reclassified from AOCI						Affected line item in the Consolidated Statement of Comprehensive Income (Loss)
	Three Months Ended
(In thousands)		June 30, 2026			June 30, 2025
AFS securities:
Amortization of unrealized gains related to securities transfer		$	55		$	70		Interest income
Tax effect		$	(13	)	$	(17	)	Income tax (benefit)
Net of tax		$	42		$	53
Pension and other benefits:
Amortization of net losses		$	29		$	305		Other noninterest expense
Amortization of prior service costs			3			2		Other noninterest expense
Tax effect		$	(8	)	$	(77	)	Income tax (benefit)
Net of tax		$	24		$	230
Total reclassifications, net of tax		$	66		$	283


Detail About AOCI Components	Amount Reclassified from AOCI							Affected line item in the Consolidated Statement of Comprehensive Income (Loss)
	Six Months Ended
(In thousands)		June 30, 2026			June 30, 2025
AFS securities:
Amortization of unrealized gains related to securities transfer		$	113		$	145		Interest income
Tax effect		$	(28	)	$	(36	)	Income tax (benefit)
Net of tax		$	85		$	109
Pension and other benefits:
Amortization of net losses		$	58		$	626		Other noninterest expense
Amortization of prior service costs			6			5		Other noninterest expense
Tax effect		$	(16	)	$	(158	)	Income tax (benefit)
Net of tax		$	48		$	473
Total reclassifications, net of tax		$	133		$	582

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Jun. 30, 2026
Trading Arrangements, by Individual [Table]
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Segment Reporting - Information about Reportable Segments (Details) - USD ($)
$ in Thousands

3 Months Ended

6 Months Ended

Jun. 30, 2026

Jun. 30, 2025

Jun. 30, 2026

Jun. 30, 2025

Dec. 31, 2025

Segment Reporting [Abstract]

Net interest income

$ 136,963

$ 124,220

$ 271,311

$ 231,443

Provision for loan losses

6,136

17,835

11,713

25,389

Net interest income after provision for loan losses

130,827

106,385

259,598

206,054

Noninterest income

Service charges on deposit accounts

5,194

4,578

10,462

8,821

Card services income

6,613

6,077

12,641

11,394

Retirement plan administration fees

16,928

15,710

33,494

31,568

Wealth management

10,948

10,678

22,082

21,624

Insurance services

4,177

4,097

8,659

8,858

Bank owned life insurance income

2,505

2,180

5,164

5,577

Net securities gains

175

112

617

Other

3,187

3,500

6,744

6,534

Total noninterest income

49,727

46,932

99,863

94,384

Noninterest expense

Salaries and employee benefits

69,004

64,155

137,763

124,849

Technology and data services

11,850

10,804

23,360

21,042

Occupancy

9,475

9,038

20,485

18,065

Professional fees and outside services

5,662

5,021

11,216

9,973

Office supplies and postage

2,060

1,871

4,227

3,813

FDIC assessment

1,984

1,820

3,994

3,514

Marketing

937

974

1,855

2,112

Amortization of intangible assets

3,191

3,042

6,539

5,153

Loan collection and other real estate owned, net

544

489

1,154

1,148

Acquisition expenses

17,180

18,401

Other

6,731

8,216

13,077

14,440

Total noninterest expense

111,438

122,610

223,670

222,510

Income before income tax expense

69,116

30,707

135,791

77,928

Income tax expense

16,086

8,197

31,619

18,673

Net income

53,030

22,510

104,172

59,255

Goodwill

453,278

454,072

453,278

454,072

$ 453,278

Intangible assets, net

51,117

64,447

51,117

64,447

57,656

Total assets

16,214,957

16,014,781

$ 16,214,957

16,014,781

$ 15,995,121

Segment reporting, other segment item, composition, description

Banking Segment [Member] | Operating Segments [Member]

Segment Reporting [Abstract]

Net interest income

136,944

124,202

$ 271,275

231,407

Provision for loan losses

6,136

17,835

11,713

25,389

Net interest income after provision for loan losses

130,808

106,367

259,562

206,018

Noninterest income

Service charges on deposit accounts

5,194

4,578

10,462

8,821

Card services income

6,613

6,077

12,641

11,394

Retirement plan administration fees

Wealth management

10,345

10,153

20,880

20,490

Insurance services

Bank owned life insurance income

2,505

2,180

5,164

5,577

Net securities gains

175

112

617

Other

4,643

5,018

11,105

10,631

Total noninterest income

29,475

28,119

60,869

56,922

Noninterest expense

Salaries and employee benefits

56,941

52,659

113,800

102,207

Technology and data services

11,411

10,341

22,526

20,142

Occupancy

9,183

8,687

19,878

17,379

Professional fees and outside services

5,380

4,851

10,648

9,666

Office supplies and postage

1,961

1,783

4,002

3,664

FDIC assessment

1,984

1,820

3,994

3,514

Marketing

972

952

1,864

2,070

Amortization of intangible assets

2,729

2,500

5,574

4,008

Loan collection and other real estate owned, net

544

489

1,154

1,148

Acquisition expenses

17,180

18,401

Other

8,078

9,684

16,985

18,224

Total noninterest expense

99,183

110,946

200,425

200,423

Income before income tax expense

61,100

23,540

120,006

62,517

Income tax expense

14,604

6,917

28,623

15,968

Net income

46,496

16,623

91,383

46,549

Goodwill

414,865

415,659

414,865

415,659

Intangible assets, net

45,465

56,785

45,465

56,785

Total assets

18,192,349

18,013,397

18,192,349

18,013,397

Retirement Plan Administration Segment [Member] | Operating Segments [Member]

Segment Reporting [Abstract]

Net interest income

Provision for loan losses

Net interest income after provision for loan losses

Noninterest income

Service charges on deposit accounts

Card services income

Retirement plan administration fees

17,347

16,081

34,319

32,337

Wealth management

600

517

1,196

1,115

Insurance services

Bank owned life insurance income

Net securities gains

Other

155

145

306

300

Total noninterest income

18,102

16,743

35,821

33,752

Noninterest expense

Salaries and employee benefits

9,240

8,700

18,131

17,154

Technology and data services

270

303

488

573

Occupancy

224

284

469

552

Professional fees and outside services

687

521

1,349

1,025

Office supplies and postage

182

120

FDIC assessment

Marketing

(41)

(18)

Amortization of intangible assets

408

485

857

1,029

Loan collection and other real estate owned, net

Acquisition expenses

Other

280

274

581

508

Total noninterest expense

11,146

10,661

22,039

21,001

Income before income tax expense

6,975

6,100

13,818

12,787

Income tax expense

1,482

1,280

2,996

2,705

Net income

5,493

4,820

10,822

10,082

Goodwill

23,877

Intangible assets, net

4,711

6,504

4,711

6,504

Total assets

47,189

48,642

47,189

48,642

All Other [Member]

Segment Reporting [Abstract]

Net interest income

^[1]

Provision for loan losses

^[1]

Net interest income after provision for loan losses

^[1]

Noninterest income

Service charges on deposit accounts

^[1]

Card services income

^[1]

Retirement plan administration fees

^[1]

(419)

(371)

(825)

(769)

Wealth management

^[1]

Insurance services

^[1]

4,177

4,096

8,659

8,857

Bank owned life insurance income

^[1]

Net securities gains

^[1]

Other

^[1]

(1,611)

(1,663)

(4,667)

(4,397)

Total noninterest income

^[1]

2,150

2,070

3,173

3,710

Noninterest expense

Salaries and employee benefits

^[1]

2,823

2,796

5,832

5,488

Technology and data services

^[1]

169

160

346

327

Occupancy

^[1]

138

134

Professional fees and outside services

^[1]

(405)

(351)

(781)

(718)

Office supplies and postage

^[1]

FDIC assessment

^[1]

Marketing

^[1]

Amortization of intangible assets

^[1]

108

116

Loan collection and other real estate owned, net

^[1]

Acquisition expenses

^[1]

Other

^[1]

(1,627)

(1,742)

(4,489)

(4,292)

Total noninterest expense

^[1]

1,109

1,003

1,206

1,086

Income before income tax expense

^[1]

1,041

1,067

1,967

2,624

Income tax expense

^[1]

Net income

^[1]

1,041

1,067

1,967

2,624

Goodwill

^[1]

14,536

Intangible assets, net

^[1]

941

1,158

941

1,158

Total assets

^[1]

$ (2,024,581)

$ (2,047,258)

$ (2,024,581)

$ (2,047,258)

[1]	Included in All Other is the revenue and expenses from certain other non-bank subsidiaries of the parent, including the insurance subsidiary, along with eliminating amounts that do not meet the definition of an operating segment.

Fair Value Measurements and Fair Value of Financial Instruments (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2026	Dec. 31, 2025
Fair Value Measurements and Fair Value of Financial Instruments [Abstract]
Individually evaluated loans, amortized cost	$ 31.8	$ 12.2
Minimum [Member]
Fair Value Measurements and Fair Value of Financial Instruments [Abstract]
Liquidation expense ratio on impaired collateral	10.00%
Maximum [Member]
Fair Value Measurements and Fair Value of Financial Instruments [Abstract]
Liquidation expense ratio on impaired collateral	50.00%
Non-Recurring Basis [Member] \| Level 3 [Member]
Fair Value Measurements and Fair Value of Financial Instruments [Abstract]
Individually evaluated loans, amortized cost	$ 31.8	12.2
Loans individually evaluated for expected credit losses, fair value	$ 17.8	$ 12.2

Derivative Instruments and Hedging Activities

6 Months Ended

Jun. 30, 2026

Derivative Instruments and Hedging Activities [Abstract]

Derivative Instruments and Hedging Activities

12. Derivative Instruments and Hedging Activities

The Company is exposed to certain risks arising from both its business operations and economic conditions. The Company principally manages its exposures to a wide variety of business and operational risks through management of its core business activities. The Company manages economic risks, including interest rate risk, primarily by managing the amount, sources and duration of its assets and liabilities and through the use of derivative instruments. Specifically, the Company may enter into derivative financial instruments to manage exposures that arise from business activities that result in the receipt or payment of future known and uncertain cash amounts, the value of which is determined by interest rates. Generally, the Company may use derivative financial instruments to manage differences in the amount, timing and duration of the Company’s known or expected cash receipts and its known or expected cash payments. Currently, the Company has interest rate derivatives resulting from a service provided to certain qualifying customers and, therefore, are not used to manage interest rate risk in the Company’s assets or liabilities. The Company manages a matched book with respect to its derivative instruments in order to minimize its net risk exposure resulting from such transactions.

Derivatives Not Designated as Hedging Instruments

The Company enters into interest rate swaps to facilitate customer transactions and meet their financing needs. These swaps are considered derivatives, but are not designated as hedging instruments. These instruments have interest rate and credit risk associated with them. To mitigate the interest rate risk, the Company enters into offsetting interest rate swaps with counterparties. The counterparty swaps are also considered derivatives and are also not designated as hedging instruments. Interest rate swaps are recorded within other assets or other liabilities on the consolidated balance sheets at their estimated fair value. Changes to the fair value of assets and liabilities arising from these derivatives are included, net, in other operating income in the consolidated statements of income.

The Company is subject to over-the-counter derivative clearing requirements, which require certain derivatives to be cleared through central clearing houses. Accordingly, the Company clears certain derivative transactions through the Chicago Mercantile Exchange Clearing House (“CME”). The CME requires the Company to post initial and variation margin payments to mitigate the risk of non-payment, the latter of which is received or paid daily based on the net asset or liability position of the contracts. A daily settlement occurs through the CME for changes in the fair value of centrally cleared derivatives. Not all of the derivatives are required to be cleared through the daily clearing agent. As a result, the total fair values of loan level derivative assets and liabilities recognized on the Company’s financial statements are not equal and offsetting.

As of June 30, 2026 and December 31, 2025, the Company had twenty-four and twenty-two risk participation agreements, respectively, with financial institution counterparties for interest rate swaps related to participated loans. Risk participation agreements provide credit protection to the financial institution that originated the swap transaction should the borrower fail to perform on its obligation. The Company enters into both risk participation agreements in which it purchases credit protection from other financial institutions and those in which it provides credit protection to other financial institutions.

The following table summarizes the derivatives outstanding:

			Balance						Balance
	Notional		Sheet		Fair		Notional		Sheet		Fair
(In thousands)	Amount		Location		Value		Amount		Location		Value
As of June 30, 2026
Derivatives not designated as hedging instruments
Interest rate derivatives	$	1,279,476		Other assets	$	72,126	$	1,279,476	Other liabilities	$	72,037
Risk participation agreements		96,259		Other assets		44		37,673	Other liabilities		16
Total derivatives not designated as hedging instruments					$	72,170				$	72,053
Netting adjustments(1)						17,471					-
Net derivatives in the balance sheet					$	54,699				$	72,053
Derivatives not offset on the balance sheet					$	1,957				$	1,957
Cash collateral(2)						-					-
Net derivative amounts					$	52,742				$	70,096
As of December 31, 2025
Derivatives not designated as hedging instruments
Interest rate derivatives	$	1,332,295		Other assets	$	68,061	$	1,332,295	Other liabilities	$	68,050
Risk participation agreements		97,319		Other assets		53		15,791	Other liabilities		16
Total derivatives not designated as hedging instruments					$	68,114				$	68,066
Netting adjustments(1)						16,010					-
Net derivatives in the balance sheet					$	52,104				$	68,066
Derivatives not offset on the balance sheet					$	5,722				$	5,722
Cash collateral(2)						-					-
Net derivative amounts					$	46,382				$	62,344

(1)

(2)

The following table indicates the gain or loss recognized in income on derivatives not designated as hedging instruments:


	Three Months Ended June 30,							Six Months Ended June 30,
(In thousands)		2026			2025				2026		2025
Derivatives not designated as hedging instruments:
(Decrease) increase in other income		$	(3	)	$	(4	)		$	31	$	17

- Definition

The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-18

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-SubTopic 10
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-Paragraph 18
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-18

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-URI https://asc.fasb.org/1943274/2147481112/505-10-50-18

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Reference 17: http://www.xbrl.org/2003/role/disclosureRef
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Reference 19: http://www.xbrl.org/2003/role/disclosureRef
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Reference 20: http://www.xbrl.org/2003/role/disclosureRef
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Reference 21: http://www.xbrl.org/2003/role/disclosureRef
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Reference 24: http://www.xbrl.org/2003/role/disclosureRef
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Reference 27: http://www.xbrl.org/2003/role/disclosureRef
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Reference 28: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Reclassification Adjustments Out of Other Comprehensive Income (Loss) - Reclassification Adjustments out of AOCI (Details) - Reclassification out of Accumulated Other Comprehensive Income [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Reclassification Adjustments Out of Other Comprehensive Income (Loss) [Abstract]
Total reclassifications, net of tax	$ 66	$ 283	$ 133	$ 582
Amortization of Unrealized Gains Related to Securities Transfer [Member]
Reclassification Adjustments Out of Other Comprehensive Income (Loss) [Abstract]
Interest income	55	70	113	145
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Reclassification Adjustments Out of Other Comprehensive Income (Loss) [Abstract]
Income tax (benefit)	(13)	(17)	(28)	(36)
Net income	42	53	85	109
Amortization of Net Losses [Member]
Reclassification Adjustments Out of Other Comprehensive Income (Loss) [Abstract]
Other noninterest expense	29	305	58	626
Amortization of Prior Service Costs [Member]
Reclassification Adjustments Out of Other Comprehensive Income (Loss) [Abstract]
Other noninterest expense	3	2	6	5
Accumulated Defined Benefit Plans Adjustment [Member]
Reclassification Adjustments Out of Other Comprehensive Income (Loss) [Abstract]
Income tax (benefit)	(8)	(77)	(16)	(158)
Net income	$ 24	$ 230	$ 48	$ 473

Description of Business	6 Months Ended
Description of Business	Jun. 30, 2026
Description of Business [Abstract]
Description of Business	1. Description of Business NBT Bancorp Inc. is a registered financial holding company incorporated in the state of Delaware in 1986, with its principal headquarters located in Norwich, New York. The principal assets of NBT Bancorp Inc. consist of all of the outstanding shares of common stock of its subsidiaries, including: NBT Bank, National Association (the “Bank”), NBT Financial Services, Inc. (“NBT Financial”), NBT Holdings, Inc. (“NBT Holdings”), CNBF Capital Trust I, NBT Statutory Trust I, NBT Statutory Trust II, Alliance Financial Capital Trust I, Alliance Financial Capital Trust II and Evans Capital Trust I (collectively, the “Trusts”). The principal sources of revenue for NBT Bancorp Inc. are the management fees and dividends it receives from the Bank, NBT Financial and NBT Holdings. Collectively, NBT Bancorp Inc. and its subsidiaries are referred to herein as (the “Company”). The Company’s business, primarily conducted through the Bank, consists of providing commercial banking, retail banking and wealth management services primarily to customers in its market area, which includes upstate New York, northeastern Pennsylvania, southern New Hampshire, western Massachusetts, Vermont, southern Maine and central and northwestern Connecticut. The Company has been, and intends to remain, a community-oriented financial institution offering a variety of financial services. The Company’s business philosophy is to operate as a community bank with local decision-making, providing a broad array of banking and financial services to retail, commercial and municipal customers.

Acquisitions (Tables)

6 Months Ended

Jun. 30, 2026

Acquisitions [Abstract]

Summary of Estimated Fair Value of Assets Acquired and Liabilities Assumed

The following table summarizes the estimated fair value of the assets acquired and liabilities assumed:


	May 2, 2025
(In thousands)	Evans Bancorp, Inc.
Consideration:
Cash paid to shareholders (fractional shares)	$	25
Common stock issuance		221,767
Total net consideration	$	221,792

Recognized amounts of identifiable assets acquired and (liabilities) assumed:
Cash and cash equivalents	$	40,197
Securities available for sale		255,487
Securities held to maturity		3,494
Loans, net of allowance for credit losses on purchased credit deteriorated loans		1,665,712
Premises and equipment, net		15,069
Core deposit intangibles		33,240
Bank owned life insurance		44,100
Other assets		71,131
Total identifiable assets acquired	$	2,128,430

Deposits	$	(1,864,049	)
Borrowings		(113,712	)
Other liabilities		(19,492	)
Total liabilities assumed	$	(1,997,253	)

Total identifiable assets, net	$	131,177

Goodwill	$	90,615

Fair Value of Acquired PCD Loans

The following table provides details related to the fair value of acquired PCD loans.


(In thousands)	PCD Loans
Par value of PCD loans at acquisition	$	336,398
Allowance for credit losses at acquisition		7,726
Discount at acquisition		(36,584	)
Fair value of PCD loans at acquisition	$	307,540

Unaudited Pro Forma Information

	Pro Forma (Unaudited)
		Three Months Ended		Six Months Ended
(In thousands)		June 30, 2025		June 30, 2025
Total revenue, net of interest expense		$	177,453	$	349,366
Net income			12,930		52,859

Securities - Amortized Cost, Estimated Fair Value and Unrealized Gains (Losses) of AFS Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Securities [Abstract]
Amortized Cost	$ 2,110,918	$ 1,958,658
Unrealized Gains	2,740	4,812
Unrealized Losses	(107,452)	(100,632)
Estimated Fair Value	2,006,206	1,862,838
U.S. Treasury [Member]
Securities [Abstract]
Amortized Cost	104,422	79,330
Unrealized Gains	0	25
Unrealized Losses	(2,664)	(2,533)
Estimated Fair Value	101,758	76,822
Federal Agency [Member]
Securities [Abstract]
Amortized Cost	248,293	248,312
Unrealized Gains	0	0
Unrealized Losses	(17,164)	(17,036)
Estimated Fair Value	231,129	231,276
State & Municipal [Member]
Securities [Abstract]
Amortized Cost	84,796	90,654
Unrealized Gains	2	4
Unrealized Losses	(3,676)	(3,931)
Estimated Fair Value	81,122	86,727
Mortgage-Backed, Government Sponsored Enterprises [Member]
Securities [Abstract]
Amortized Cost	589,968	470,606
Unrealized Gains	506	1,651
Unrealized Losses	(26,580)	(23,532)
Estimated Fair Value	563,894	448,725
Mortgage-Backed, U.S. Government Agency Securities [Member]
Securities [Abstract]
Amortized Cost	175,232	145,836
Unrealized Gains	275	660
Unrealized Losses	(4,566)	(3,659)
Estimated Fair Value	170,941	142,837
Collateralized Mortgage Obligations, Government-Sponsored Enterprises [Member]
Securities [Abstract]
Amortized Cost	625,419	653,512
Unrealized Gains	1,504	2,137
Unrealized Losses	(28,390)	(26,214)
Estimated Fair Value	598,533	629,435
Collateralized Mortgage Obligations, U.S. Government Agency Securities [Member]
Securities [Abstract]
Amortized Cost	260,288	247,908
Unrealized Gains	453	335
Unrealized Losses	(23,626)	(22,192)
Estimated Fair Value	237,115	226,051
Corporate [Member]
Securities [Abstract]
Amortized Cost	22,500	22,500
Unrealized Gains	0	0
Unrealized Losses	(786)	(1,535)
Estimated Fair Value	$ 21,714	$ 20,965

Segment Reporting (Details)	6 Months Ended
Segment Reporting (Details)	Jun. 30, 2026 Segment
Segment Reporting [Abstract]
Number of reportable segments	2

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Defined Benefit Post-Retirement Plans (Tables)

6 Months Ended

Jun. 30, 2026

Defined Benefit Post-Retirement Plans [Abstract]

Net Periodic Pension Benefits and Other Benefit Costs

The components of expense for Pension Benefits and Other Benefits are set forth below:


	Pension Benefits							Other Benefits
	Three Months Ended June 30,							Three Months Ended June 30,
(In thousands)		2026			2025				2026		2025
Components of net periodic (benefit) cost:
Service cost		$	671		$	676			$	-	$	1
Interest cost			1,164			1,137				58		59
Expected return on plan assets			(2,312	)		(2,091	)			-		-
Net amortization			32			308				-		(1	)
Total net periodic (benefit) cost		$	(445	)	$	30			$	58	$	59


	Pension Benefits							Other Benefits
	Six Months Ended June 30,							Six Months Ended June 30,
(In thousands)		2026			2025				2026			2025
Components of net periodic (benefit) cost:
Service cost		$	1,343		$	1,369			$	1		$	2
Interest cost			2,329			2,206				116			118
Expected return on plan assets			(4,625	)		(4,136	)			-			-
Net amortization			65			633				(1	)		(2	)
Total net periodic (benefit) cost		$	(888	)	$	72			$	116		$	118

Consolidated Statements of Income (unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Interest, fee and dividend income
Interest and fees on loans	$ 163,764	$ 158,912	$ 324,866	$ 296,964
Securities available for sale	14,770	11,609	28,252	21,871
Securities held to maturity	4,426	4,870	8,776	9,784
Other	2,801	2,186	6,513	3,362
Total interest, fee and dividend income	185,761	177,577	368,407	331,981
Interest expense
Deposits	44,879	48,219	89,714	90,807
Short-term borrowings	1,165	1,046	1,987	1,912
Long-term debt	445	296	886	562
Subordinated debt	611	2,001	1,121	3,823
Junior subordinated debt	1,698	1,795	3,388	3,434
Total interest expense	48,798	53,357	97,096	100,538
Net interest income	136,963	124,220	271,311	231,443
Provision for loan losses	6,136	17,835	11,713	25,389
Net interest income after provision for loan losses	130,827	106,385	259,598	206,054
Noninterest income
Service charges on deposit accounts	5,194	4,578	10,462	8,821
Card services income	6,613	6,077	12,641	11,394
Retirement plan administration fees	16,928	15,710	33,494	31,568
Wealth management	10,948	10,678	22,082	21,624
Insurance services	4,177	4,097	8,659	8,858
Bank owned life insurance income	2,505	2,180	5,164	5,577
Net securities gains	175	112	617	8
Other	3,187	3,500	6,744	6,534
Total noninterest income	49,727	46,932	99,863	94,384
Noninterest expense
Salaries and employee benefits	69,004	64,155	137,763	124,849
Technology and data services	11,850	10,804	23,360	21,042
Occupancy	9,475	9,038	20,485	18,065
Professional fees and outside services	5,662	5,021	11,216	9,973
Office supplies and postage	2,060	1,871	4,227	3,813
FDIC assessment	1,984	1,820	3,994	3,514
Marketing	937	974	1,855	2,112
Amortization of intangible assets	3,191	3,042	6,539	5,153
Loan collection and other real estate owned, net	544	489	1,154	1,148
Acquisition expenses	0	17,180	0	18,401
Other	6,731	8,216	13,077	14,440
Total noninterest expense	111,438	122,610	223,670	222,510
Income before income tax expense	69,116	30,707	135,791	77,928
Income tax expense	16,086	8,197	31,619	18,673
Net income	$ 53,030	$ 22,510	$ 104,172	$ 59,255
Earnings per share
Basic (in Dollars per share)	$ 1.02	$ 0.45	$ 2	$ 1.21
Diluted (in Dollars per share)	$ 1.02	$ 0.44	$ 1.99	$ 1.21