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Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands | Mar. 31, 2023 | Jan. 01, 2023 | Dec. 31, 2022
--- | --- | --- | ---
Other Commitments [Line Items] |  |  |
Outstanding loan commitments | $ 707,900 |  | $ 736,100
Outstanding stand-by letters of credit | 29,300 |  | 29,800
Reserve for unfunded commitments |  | $ 3,700 | 1,812
Credit losses for unfunded commitments | 400 |  |
Future commitments outstanding related to investments | 17,700 |  |
Other Liabilities [Member] |  |  |
Other Commitments [Line Items] |  |  |
Reserve for unfunded commitments | 5,100 |  | 1,800
Performance Stand-by Letters of Credit [Member] |  |  |
Other Commitments [Line Items] |  |  |
Outstanding stand-by letters of credit | $ 0 |  | $ 655

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