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Off-Balance Sheet Commitments - Distribution of Undisbursed Loan Commitments (Detail) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Loss Contingencies [Line Items] |  |
Total undisbursed loan commitments | $ 872,317 | $ 715,022
Commitments to extend credit |  |
Loss Contingencies [Line Items] |  |
Total undisbursed loan commitments | 780,543 | 626,474
Standby letters of credit |  |
Loss Contingencies [Line Items] |  |
Total undisbursed loan commitments | 71,829 | 49,287
Commercial letters of credit |  |
Loss Contingencies [Line Items] |  |
Total undisbursed loan commitments | $ 19,945 | $ 39,261

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- Details
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