Loans and Allowance for Loan Losses - Summary of Post-modification Balance of TDRs listed by Type of Modification (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post modification balance of TDRs	$ 798	$ 4,239	$ 30,761
Adjusted interest rate and extended maturity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post modification balance of TDRs	0	0	1,513
Adjusted interest rate and principal deferred
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post modification balance of TDRs	0	0	39
Adjusted interest rate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post modification balance of TDRs	0	0	3,352
Interest only/principal deferred
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post modification balance of TDRs	0	1,305	2,769
Extended maturity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post modification balance of TDRs	200	35	0
Extended maturity and interest only/principal deferred
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post modification balance of TDRs	0	427	47
Additional underwriting- increased exposure
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post modification balance of TDRs	0	0	10,822
Principal and interest deferred
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post modification balance of TDRs	0	422	0
Court-ordered concession
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post modification balance of TDRs	396	1,995	355
Subordination
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post modification balance of TDRs	0	0	11,032
Other
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post modification balance of TDRs	$ 202	$ 55	$ 832