Quarterly report pursuant to Section 13 or 15(d)

Off-Balance Sheet Commitments - Distribution of Total Loan Commitments (Detail)

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Off-Balance Sheet Commitments - Distribution of Total Loan Commitments (Detail) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Loss Contingencies [Line Items]    
Total commitments $ 924,371 $ 872,317
Unused Commitments to Extend Credit    
Loss Contingencies [Line Items]    
Total commitments 834,661 780,543
Standby letters of credit    
Loss Contingencies [Line Items]    
Total commitments 71,518 71,829
Commercial letters of credit    
Loss Contingencies [Line Items]    
Total commitments $ 18,192 $ 19,945