Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Deferred Tax Asset, Tax Deferred Expense, Lease Liability	$ 9,581	$ 9,489
Deferred Tax Assets, Gross [Abstract]
Allowance for credit losses	21,837	19,597
Postretirement benefits other than pensions	223	235
Deferred Tax Assets, Operating Loss Carryforwards	37	75
Deferred compensation	1,960	1,969
Accrued interest on nonaccrual loans	935	779
Accrued incentives	3,185	2,591
Unfunded loan commitments & other reserves	2,126	1,363
Other	1,205	988
Total deferred tax assets	77,762	39,443
Deferred tax liabilities:
Loan origination fees and costs	(1,320)	(253)
Deferred Tax Liabilities, Leasing Arrangements	8,646	8,589
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	(2,139)	(1,725)
Section 197 intangibles	(1,717)	(1,107)
Other	(197)	(308)
Total deferred tax liabilities	(14,019)	(11,982)
Net deferred tax asset	63,743	27,461
Unrealized loss on securities available for sale	$ 36,673	$ 2,357