Comprehensive Income (Loss) - Components of Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Before Tax Amount
Other comprehensive income (loss), net	$ 10,126	$ (42,140)
Tax Benefit (Expense)
Other comprehensive income (loss), net	(2,670)	11,040
Net of Tax Amount
Other comprehensive loss, net of tax	7,456	(31,100)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member]
Before Tax Amount
Unrealized gains (losses) on available for sale securities arising during the period	10,298	(41,964)
Tax Benefit (Expense)
Unrealized gains (losses) on available for sale securities arising during the period	(2,716)	10,999
Net of Tax Amount
Net current period other comprehensive income	7,582	(30,965)
Other comprehensive loss, net of tax	7,582	(30,965)
Amortization of Gain on Debt Securities Reclassified to Held to Maturity
Before Tax Amount
Other comprehensive income (loss), net	(172)	(176)
Tax Benefit (Expense)
Other comprehensive income (loss), net	46	41
Net of Tax Amount
Other comprehensive loss, net of tax	$ (126)	$ (135)