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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2025

Income Tax Disclosure [Abstract]

Schedule of Income Tax Expense

Income tax expense is comprised of the following amounts:

			Year Ended December 31,
			2025						2024						2023
			(In Thousands)
Current provision:
Federal			$	7,175					$	16,464					$	960
State			2,068						6,120						1,788
Total current provision			9,243						22,584						2,748
Deferred provision (benefit)
Federal			14,063						912						12,922
State			8,285						(520)						3,245
Total deferred provision (benefit)			22,348						392						16,167
Total provision for income taxes			$	31,591					$	22,976					$	18,915

Schedule of Reconciliation of Effective Income Tax Expense

Income tax expense is comprised of the following amounts:

			Year Ended December 31,
			2025
			(Dollars In Thousands)
Expected income tax expense at statutory federal tax rate			$	25,591					21.0		%
State taxes, net of federal income tax benefit (1)			8,192						6.7		%
Tax credit investments
Investments in affordable housing and new markets tax credits (2)			(1,391)						(1.1)		%
Investments in historic tax credits (3)			(526)						(0.4)		%
Nontaxable or non deductible items
Tax-exempt interest income			(2,307)						(1.9)		%
Bank-owned life insurance			(954)						(0.8)		%
Merger and restructuring expense			1,250						1.0		%
Other non deductible items			1,584						1.3		%
Other adjustments			152						0.1		%
Total provision for income taxes			$	31,591					25.9		%

_________________________________________________________________________

(1) State taxes in Massachusetts and New York make up the majority (greater than 50%) of the tax effect in this category of the rate reconciliation.

(2) Company has adopted proportional amortization for these investments. Therefore, the tax credit category includes the tax credit, net of the proportional amortization.

(3) Company has adopted the deferral method for these investments. Therefore, the tax credit category includes the tax benefit for these credits.

Income tax expense is comprised of the following amounts:

			Year Ended December 31,
			2024												2023
			(Dollars In Thousands)
Expected income tax expense at statutory federal tax rate			$	19,255					21.0		%				$	19,722					21.0		%
State taxes, net of federal income tax benefit			4,395						4.8		%				3,977						4.2		%
Bank-owned life insurance			(424)						(0.5)		%				(443)						(0.5)		%
Tax-exempt interest income			(597)						(0.7)		%				(307)						(0.3)		%
Merger and restructuring expense			528						0.6		%				159						0.2		%
Energy tax credits			—						—		%				(4,504)						(4.8)		%
Investments in affordable housing projects			(607)						(0.7)		%				(917)						(1.0)		%
Other, net			426						0.5		%				1,228						1.3		%
Total provision for income taxes			$	22,976					25.0		%				$	18,915					20.1		%

Schedule of Cash Flow, Supplemental Disclosures

The amount of income taxes paid (net of refunds received) for federal and state taxes:

			2025
			(Dollars In Thousands)
Federal			$	9,171
State:
Massachusetts			$	4,160
New York			863
Other			774
Total state			$	5,797
Total federal and state			$	14,968

Schedule of Components of Deferred Tax Assets and Liabilities

The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and liabilities at the dates indicated are as follows:

			At December 31,
			2025						2024
			(In Thousands)
Deferred tax assets:
Allowance for credit losses			$	73,001					$	35,163
Operating leases - liability			24,051						11,924
Deferred compensation			10,364						4,088
Identified intangible assets and goodwill			4,199						4,666
Supplemental Executive Retirement Plans			2,473						2,427
Net operating loss carryforwards			155						145
Postretirement benefits			505						811
Tax credit carryforward			6,986						—
Nonaccrual interest			1,300						780
Restricted stock and stock option plans			339						1,153
Unrealized loss on investment securities available-for-sale			6,831						15,629
Acquisition fair value adjustments			98,047						11,531
Depreciation			3,183						—
Loan servicing rights			2,868						—
Other			335						166
Total gross deferred tax assets, before valuation allowance			234,637						88,483
Valuation allowance			(400)						—
Deferred tax assets, net of valuation allowance			234,237						88,483
Deferred tax liabilities:
Right-of-use asset - operating leases			22,592						11,591
Identified intangible assets and goodwill			49,654						6,475
Deferred loan origination costs, net			3,357						3,926
Depreciation			—						723
Prepaid expense			1,015						377
Accrued Expense			2,048						7,121
Investment in partnership			906						1,646
Loan servicing rights			5,174						—
Other			4						4
Total gross deferred tax liabilities			84,750						31,863
Net deferred tax asset			$	149,487					$	56,620

Schedule of Valuation Allowance

The components of the Company’s valuation allowance on its deferred tax asset, net as of December 31, 2025 and 2024 are as follows:

			At December 31,
			2025						2024
			(In Thousands)
State valuation allowances			$	(400)					$	—

Schedule of Unrecognized Tax Benefits

The following table presents changes in unrecognized tax benefits for the years ended December 31, 2025, 2024, and 2023:

			At December 31,
			2025						2024						2023
			(In Thousands)
Balance at January 1			$	643					$	638					$	621
Acquired unrecognized tax benefits			11,502						—						—
Additions based on tax positions related to the current year			—						—						—
Additions for tax positions of prior years			981						5						34
Reductions for tax positions of prior years			(84)						—						—
Reductions due to lapse of statue of limitations			(897)						—						(17)
Settlements			(221)						—						—
Balance at December 31			$	11,924					$	643					$	638

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