Comprehensive Income (Loss) - Summary of Changes in Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ 827,014	$ 763,784	$ 725,263
Other comprehensive (loss) income	(78,025)	(8,133)	9,149
Amounts reclassified from accumulated other comprehensive income		(6)	(872)
Net unrealized gain on securities reclassified from available for sale to held to maturity	0	2,784	0
Balance at end of period	1,108,587	827,014	763,784
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	3,264	11,397	2,248
Other comprehensive (loss) income	(78,025)	(8,133)	9,149
Other comprehensive (loss) income before reclassifications		(8,127)	10,021
Balance at end of period	(74,761)	3,264	11,397
Unrealized Gains (Losses)  on Available- for-Sale Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	745	11,402	1,936
Other comprehensive (loss) income	(77,474)	(7,873)	9,466
Other comprehensive (loss) income before reclassifications		(7,867)	10,338
Amounts reclassified from accumulated other comprehensive income		(6)	(872)
Net unrealized gain on securities reclassified from available for sale to held to maturity		(2,784)
Balance at end of period	(76,729)	745	11,402
Amortization of Gain on Debt Securities Reclassified to Held to Maturity
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	2,519	0	0
Other comprehensive (loss) income	(551)	(265)	0
Other comprehensive (loss) income before reclassifications		(265)	0
Amounts reclassified from accumulated other comprehensive income		0	0
Net unrealized gain on securities reclassified from available for sale to held to maturity		2,784
Balance at end of period	1,968	2,519	0
Unrealized Gains  (Losses) on  Derivatives
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	0	25	317
Other comprehensive (loss) income	0	(25)	(292)
Other comprehensive (loss) income before reclassifications		(25)	(292)
Amounts reclassified from accumulated other comprehensive income		0	0
Balance at end of period	0	0	25
Pension Items
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	0	(30)	(5)
Other comprehensive (loss) income	0	30	(25)
Other comprehensive (loss) income before reclassifications		30	(25)
Amounts reclassified from accumulated other comprehensive income		0	0
Balance at end of period	$ 0	$ 0	$ (30)