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		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post modification balance of TDRs	$ 3,165	$ 462	$ 3,957	$ 757
Extended maturity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post modification balance of TDRs	595	0	997	0
Adjusted interest rate and extended maturity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post modification balance of TDRs	22	0	412	0
Interest only/principal deferred
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post modification balance of TDRs	130	0	130	0
Covenant modification
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post modification balance of TDRs	2,418	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	$ 0	$ 462	$ 0	$ 462