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Loans Held for Investment and Allowance for Credit Losses - Narrative (Details) | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2022 loan | Sep. 30, 2022 USD ($) loan | Sep. 30, 2023 USD ($) | Dec. 31, 2022 USD ($)
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items] |  |  |  |
Total loans |  |  | $ 337,635,000 | $ 236,601,000
Commitments to lend |  |  |  | 0
Number of principal charge-offs related to TDRs | loan | 0 | 1 |  |
Charge-offs related to TDRs |  | $ 10,000.00 |  |
Number of new loans modification | loan | 0 | 0 |  |
Number of restructured loans | loan |  | 1 |  |
Total |  |  |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items] |  |  |  |
Total loans |  |  | 10,406,000 |
Strategic Program loans |  |  |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items] |  |  |  |
Cash held in reserve by strategic programs |  |  | 29,100,000 | 16,600,000
Total loans |  |  | 20,040,000 | 24,259,000
SBA |  |  |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items] |  |  |  |
Total loans |  |  |  | 145,172,000
SBA | SBA |  |  |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items] |  |  |  |
Total loans |  |  |  | 300,000
SBA | SBA | Total |  |  |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items] |  |  |  |
Total loans |  |  | $ 4,700,000 | $ 1,100,000

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