Comprehensive Income (Loss) - Components of Other Comprehensive Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Before Tax Amount
Other comprehensive income (loss)	$ (11,509)	$ 12,387	$ 13,871
Tax Benefit (Expense)
Other comprehensive income (loss)	3,376	(3,238)	(3,785)
Net of Tax Amount
Unrealized holding gains on securities available for sale arising during the period	(10,651)	10,338	10,718
Other comprehensive (loss) income	(8,133)	9,149	10,086
AOCI, Debt Securities Available For Sale, Unrealized Holding Gain Loss Parent Member
Before Tax Amount
Unrealized holding gains on securities available for sale arising during the period	(15,117)	14,049
Reclassification adjustment for securities gains included in net income	(9)	(1,213)
Other comprehensive income (loss)	(15,126)	12,836
Tax Benefit (Expense)
Unrealized holding gains on securities available for sale arising during the period	4,466	(3,711)
Reclassification adjustment for securities gains included in net income	3	341
Other comprehensive income (loss)	4,469	(3,370)
Net of Tax Amount
Unrealized holding gains on securities available for sale arising during the period	(10,651)	10,338
Reclassification adjustment for securities gains included in net income	(6)	(872)
Other comprehensive (loss) income	(10,657)	9,466
Unrealized Gains (Losses)  on Available- for-Sale Securities
Before Tax Amount
Other comprehensive income (loss)			14,763
Tax Benefit (Expense)
Other comprehensive income (loss)			(4,045)
Net of Tax Amount
Reclassification adjustment for securities gains included in net income	(6)	(872)
Other comprehensive (loss) income	(7,873)	9,466	10,718
Net gain on securities reclassified from available for sale to held to maturity
Before Tax Amount
Other comprehensive income (loss)	3,814
Tax Benefit (Expense)
Other comprehensive income (loss)	(1,030)
Net of Tax Amount
Other comprehensive (loss) income	2,784
Amortization of gain on debt securities reclassified to held to maturity from available for sale
Before Tax Amount
Other comprehensive income (loss)	(383)
Tax Benefit (Expense)
Other comprehensive income (loss)	118
Net of Tax Amount
Reclassification adjustment for securities gains included in net income	0	0
Other comprehensive (loss) income	(265)	0	0
Unrealized gains on derivatives
Before Tax Amount
Other comprehensive income (loss)	143	(413)	(828)
Tax Benefit (Expense)
Other comprehensive income (loss)	(168)	121	242
Net of Tax Amount
Reclassification adjustment for securities gains included in net income	0	0
Other comprehensive (loss) income	(25)	(292)	(586)
Change in pension liability, net
Before Tax Amount
Other comprehensive income (loss)	43	(36)	(64)
Tax Benefit (Expense)
Other comprehensive income (loss)	(13)	11	18
Net of Tax Amount
Reclassification adjustment for securities gains included in net income	0	0
Other comprehensive (loss) income	$ 30	$ (25)	$ (46)