Loans and Allowance for Credit Losses - Summary of Post-modification Balance of TDRs listed by Type of Modification (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post modification balance of TDRs	$ 5,687	$ 200	$ 9,644	$ 957
Extended maturity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post modification balance of TDRs	0	200	997	200
Adjusted interest rate and extended maturity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post modification balance of TDRs	123	0	535	0
Interest only/principal deferred
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post modification balance of TDRs	0	0	130	0
Covenant modification
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post modification balance of TDRs	0	0	2,418	0
Court-ordered concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post modification balance of TDRs	0	0	0	295
Principal and interest deferred
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post modification balance of TDRs	2,343	0	2,343	462
Extended maturity and interest only/principal deferred
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post modification balance of TDRs	2,997	0	2,997	0
Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post modification balance of TDRs	$ 224	$ 0	$ 224	$ 0