| Servicing Assets - Summary of Changes in Servicing Assets (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
| Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | |
| Transfers and Servicing [Abstract] | ||||
| Balance at beginning of period | $ 7,352 | $ 7,354 | $ 7,176 | $ 7,080 | 
| Addition related to sale of SBA loans | 396 | 828 | 1,410 | 2,377 | 
| Amortization | (592) | (758) | (1,815) | (2,033) | 
| Change in valuation allowance | 385 | |||
| Balance at end of period | $ 7,156 | $ 7,424 | $ 7,156 | $ 7,424 | 
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- Definition Amortized amount of contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount of amortization of contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount conveyed to unrelated parties of contract to contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount of increase (decrease) in the amortized amount from a decrease (increase) in the valuation allowance applied to the servicing asset for a contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- References No definition available. 
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