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Loans and Allowance for Credit Losses - Allowance for Loan Losses on Impaired Loans (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Mar. 31, 2023 | Dec. 31, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | --- | --- | --- | --- | ---
Allowance for Loan Losses |  |  |  |  |  |
Total | $ 12,321 | $ 12,034 | $ 11,985 | $ 10,602 | $ 9,987 | $ 9,855
Portfolio Loan Balances |  |  |  |  |  |
Total loans held for investment | 290,659 |  | 236,601 |  |  |
Financing Receivable, Incurred Loss Methodology |  |  |  |  |  |
Allowance for Loan Losses |  |  |  |  |  |
Individually |  |  | 0 |  |  |
Collectively |  |  | 11,985 |  |  |
Total | 12,321 |  | 11,985 |  |  |
Portfolio Loan Balances |  |  |  |  |  |
Individually |  |  | 450 |  |  |
Collectively |  |  | 236,151 |  |  |
Total loans held for investment | 290,659 |  | 236,601 |  |  |
SBA |  |  |  |  |  |
Allowance for Loan Losses |  |  |  |  |  |
Total |  |  |  | 3,384 | 3,064 | 2,739
Portfolio Loan Balances |  |  |  |  |  |
Total loans held for investment |  |  | 145,172 |  |  |
SBA | Financing Receivable, Incurred Loss Methodology |  |  |  |  |  |
Allowance for Loan Losses |  |  |  |  |  |
Individually |  |  | 0 |  |  |
Collectively |  |  | 4,294 |  |  |
Total |  |  | 4,294 |  |  |
Portfolio Loan Balances |  |  |  |  |  |
Individually |  |  | 450 |  |  |
Collectively |  |  | 144,722 |  |  |
Total loans held for investment |  |  | 145,172 |  |  |
Commercial, non-real estate |  |  |  |  |  |
Allowance for Loan Losses |  |  |  |  |  |
Total |  |  |  | 274 | 107 | 132
Portfolio Loan Balances |  |  |  |  |  |
Total loans held for investment |  |  | 11,484 |  |  |
Commercial, non-real estate | Financing Receivable, Incurred Loss Methodology |  |  |  |  |  |
Allowance for Loan Losses |  |  |  |  |  |
Individually |  |  | 0 |  |  |
Collectively |  |  | 401 |  |  |
Total |  |  | 401 |  |  |
Portfolio Loan Balances |  |  |  |  |  |
Individually |  |  | 0 |  |  |
Collectively |  |  | 11,484 |  |  |
Total loans held for investment |  |  | 11,484 |  |  |
Residential real estate |  |  |  |  |  |
Allowance for Loan Losses |  |  |  |  |  |
Total | 708 | 799 | 876 | 415 | 411 | 352
Portfolio Loan Balances |  |  |  |  |  |
Total loans held for investment | 29,357 |  | 37,815 |  |  |
Residential real estate | Financing Receivable, Incurred Loss Methodology |  |  |  |  |  |
Allowance for Loan Losses |  |  |  |  |  |
Individually |  |  | 0 |  |  |
Collectively |  |  | 497 |  |  |
Total |  |  | 497 |  |  |
Portfolio Loan Balances |  |  |  |  |  |
Individually |  |  | 0 |  |  |
Collectively |  |  | 37,815 |  |  |
Total loans held for investment |  |  | 37,815 |  |  |
Retained Strategic Program loans |  |  |  |  |  |
Allowance for Loan Losses |  |  |  |  |  |
Total | 7,256 | 7,227 | 6,701 | 6,442 | 6,322 | 6,549
Portfolio Loan Balances |  |  |  |  |  |
Total loans held for investment | 20,732 |  | 24,259 |  |  |
Retained Strategic Program loans | Financing Receivable, Incurred Loss Methodology |  |  |  |  |  |
Allowance for Loan Losses |  |  |  |  |  |
Individually |  |  | 0 |  |  |
Collectively |  |  | 6,701 |  |  |
Total |  |  | 6,701 |  |  |
Portfolio Loan Balances |  |  |  |  |  |
Individually |  |  | 0 |  |  |
Collectively |  |  | 24,259 |  |  |
Total loans held for investment |  |  | 24,259 |  |  |
Commercial real estate |  |  |  |  |  |
Allowance for Loan Losses |  |  |  |  |  |
Total | 3,167 | 3,034 | 3,238 | 22 | 21 | 21
Portfolio Loan Balances |  |  |  |  |  |
Total loans held for investment | 170,253 |  | 12,063 |  |  |
Commercial real estate | Financing Receivable, Incurred Loss Methodology |  |  |  |  |  |
Allowance for Loan Losses |  |  |  |  |  |
Individually |  |  | 0 |  |  |
Collectively |  |  | 27 |  |  |
Total |  |  | 27 |  |  |
Portfolio Loan Balances |  |  |  |  |  |
Individually |  |  | 0 |  |  |
Collectively |  |  | 12,063 |  |  |
Total loans held for investment |  |  | 12,063 |  |  |
Consumer |  |  |  |  |  |
Allowance for Loan Losses |  |  |  |  |  |
Total | 90 | $ 82 | 65 | $ 65 | $ 62 | $ 62
Portfolio Loan Balances |  |  |  |  |  |
Total loans held for investment | $ 6,180 |  | 5,808 |  |  |
Consumer | Financing Receivable, Incurred Loss Methodology |  |  |  |  |  |
Allowance for Loan Losses |  |  |  |  |  |
Individually |  |  | 0 |  |  |
Collectively |  |  | 65 |  |  |
Total |  |  | 65 |  |  |
Portfolio Loan Balances |  |  |  |  |  |
Individually |  |  | 0 |  |  |
Collectively |  |  | 5,808 |  |  |
Total loans held for investment |  |  | $ 5,808 |  |  |

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