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Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2023 | Jun. 30, 2023 | Jan. 01, 2023 | Dec. 31, 2022
Other Commitments [Line Items] |  |  |  |
Outstanding loan commitments | $ 679,100 | $ 679,100 |  | $ 736,100
Outstanding stand-by letters of credit | 29,500 | 29,500 |  | 29,800
Reserve for unfunded commitments |  |  | $ 3,700 | 1,812
Credit losses for unfunded commitments | 600 | 1,000 |  |
Future commitments outstanding related to investments | 17,900 | 17,900 |  |
Other Liabilities [Member] |  |  |  |
Other Commitments [Line Items] |  |  |  |
Reserve for unfunded commitments | $ 4,500 | $ 4,500 |  | $ 1,800

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