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Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Other Commitments [Line Items] |  |
Outstanding loan commitments | $ 496,200 | $ 475,100
Future commitments outstanding related to investments | 7,700 |
SBIC [Member] |  |
Other Commitments [Line Items] |  |
Future commitments outstanding related to investments | 9,000 |
Other Liabilities [Member] |  |
Other Commitments [Line Items] |  |
Reserves for unfunded commitments to borrowers | 1,000 | 962
Performance Stand-by Letters of Credit [Member] |  |
Other Commitments [Line Items] |  |
Outstanding stand-by letters of credit | 77 | 655
Financial Stand-by Letters of Credit [Member] |  |
Other Commitments [Line Items] |  |
Outstanding stand-by letters of credit | $ 4,700 | $ 4,500

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