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Loans and Allowance for Credit Losses - Company's loan portfolio by the past due (Details) - Loans held for investment - USD ($) $ in Thousands | Sep. 30, 2025 | Jun. 30, 2025 | Mar. 31, 2025 | Dec. 31, 2024
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Loans and Allowance for Credit Losses |  |  |  |
Financing receivable, Current fiscal year | $ 375,220 | $ 384,739 | $ 367,860 |
Financing receivable, Fiscal year before current fiscal year |  |  |  | $ 376,991
Current |  |  |  |
Loans and Allowance for Credit Losses |  |  |  |
Financing receivable, Current fiscal year | 261,595 | 257,780 | 220,538 |
Financing receivable, Fiscal year before current fiscal year |  |  |  | 223,513
30-59 days past due |  |  |  |
Loans and Allowance for Credit Losses |  |  |  |
Financing receivable, Current fiscal year | 9,559 | 6,065 | 37,617 |
Financing receivable, Fiscal year before current fiscal year |  |  |  | 49,460
60-89 days past due |  |  |  |
Loans and Allowance for Credit Losses |  |  |  |
Financing receivable, Current fiscal year | 0 | 1,295 | 2,114 |
Financing receivable, Fiscal year before current fiscal year |  |  |  | 16,936
Greater than 90 days |  |  |  |
Loans and Allowance for Credit Losses |  |  |  |
Financing receivable, Current fiscal year | $ 104,066 | $ 119,599 | $ 107,591 |
Financing receivable, Fiscal year before current fiscal year |  |  |  | $ 87,082

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