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Allowance for Credit Losses - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Loans and Leases Receivable Disclosure [Line Items]        
Allowance for credit loss $ 85,376 $ 91,847 $ 30,616 $ 32,582
Interest lost on nonaccrual loans 2,226 1,804 1,201  
Interest income on nonaccrual loans 471 $ 701 $ 372  
Threshold for loan analysis $ 1,000      
Minimum        
Loans and Leases Receivable Disclosure [Line Items]        
Valuation frequency period 3 months      
Maximum        
Loans and Leases Receivable Disclosure [Line Items]        
Valuation frequency period 12 months