Loans and Allowance for Credit Losses - Summary of Post-modification Balance of TDRs listed by Type of Modification (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($)
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post modification balance of TDRs	$ 792
Extended maturity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post modification balance of TDRs	402
Adjusted interest rate and extended maturity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post modification balance of TDRs	$ 390