Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Computed at the statutory rate	$ 16,439	$ 507	$ 14,759
Increase (decrease) resulting from:
State and local taxes, net of federal benefit	364	(517)	2,665
Tax-exempt interest	(332)	(412)	(749)
Non-taxable life insurance income	(1,043)	(852)	(654)
Non-deductible expenses	426	814	258
Share-based payments	(477)	2	(200)
Federal tax credits	(92)	(3,715)	(4,330)
Investments reported under proportional amortization method	(1,441)	(1,253)
Bargain purchase gain	(448)
Change in valuation allowance	(1,410)	98	354
Other	316	171	491
Non-deductible transactions costs	56	62
Captive insurance company	(273)	(311)
BOLI surrender	3,575
Total income tax expense	$ 15,660	$ (5,406)	$ 12,594