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Off-Balance Sheet Commitments - Distribution of Undisbursed Loan Commitments (Detail) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Loss Contingencies [Line Items] |  |
Total undisbursed loan commitments | $ 580,861 | $ 555,616
Commitments to extend credit |  |
Loss Contingencies [Line Items] |  |
Total undisbursed loan commitments | 463,841 | 453,900
Standby letters of credit |  |
Loss Contingencies [Line Items] |  |
Total undisbursed loan commitments | 48,922 | 47,169
Commercial letters of credit |  |
Loss Contingencies [Line Items] |  |
Total undisbursed loan commitments | $ 68,098 | $ 54,547

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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- Details
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- Details
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