Accumulated Other Comprehensive (Loss) Income - Components of Accumulated Other Comprehensive (Loss) Income, Net of Taxes (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Accumulated Other Comprehensive (Loss) Income [Line Items]
Beginning balance		$ (50,646)
Other comprehensive income (loss)		6,654	$ 11,458	$ (45,751)
Reclassification adjustment recorded in earnings	[1]	747
Ending balance		(43,992)	(50,646)
Net Unrealized (Losses) Gains on Available-for-Sale Investment Securities
Accumulated Other Comprehensive (Loss) Income [Line Items]
Beginning balance		(34,321)	(40,066)	(1,216)
Other comprehensive income (loss)		(796)	5,745	(38,850)
Ending balance		(35,117)	(34,321)	(40,066)
Net Change Related to Derivatives Used for Cash Flow Hedges
Accumulated Other Comprehensive (Loss) Income [Line Items]
Beginning balance		(4,566)	(6,831)	(159)
Other comprehensive income (loss)		1,397	2,265	(6,672)
Reclassification adjustment recorded in earnings		747
Ending balance		(2,422)	(4,566)	(6,831)
Net Change Related to Defined Benefit Pension Plans
Accumulated Other Comprehensive (Loss) Income [Line Items]
Beginning balance		(11,759)	(15,207)	(14,978)
Other comprehensive income (loss)		5,306	3,448	(229)
Ending balance		(6,453)	(11,759)	(15,207)
Accumulated Other Comprehensive (Loss) Income
Accumulated Other Comprehensive (Loss) Income [Line Items]
Beginning balance		(50,646)	(62,104)	(16,353)
Other comprehensive income (loss)		5,907	11,458	(45,751)
Ending balance		$ (43,992)	$ (50,646)	$ (62,104)

[1] (2) Represents reclassification to earnings as a reduction to interest income of amounts included in accumulated other comprehensive income on the consolidated balance sheet related to the interest rate swap terminated August 2, 2024.