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Loans and Allowance for Credit Losses - Other (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Loans and Allowance for Credit Losses |  |  |  |  |
Accrued interest receivable | $ 4,789,000 |  | $ 4,789,000 |  | $ 4,575,000
Financing receivable, nonaccrual, interest income | 0 | $ 0 | 0 | $ 0 |
Financing receivable, modified, subsequent default | 0 | 0 | 0 | 0 |
Financing receivable, modified, commitment to lend | 0 |  | 0 |  | 0
Unfunded loan commitment |  |  |  |  |
Loans and Allowance for Credit Losses |  |  |  |  |
Off-Balance-Sheet, credit loss liability | 131,000 |  | 131,000 |  | $ 131,000
Off-Balance-Sheet, credit loss, liability, credit loss expense (reversal) | 0 | 0 | 0 | 0 |
Commercial business |  |  |  |  |
Loans and Allowance for Credit Losses |  |  |  |  |
Financing receivable, modified in period, amount | $ 0 | $ 2,000,000 | 0 | $ 2,000,000 |
Financing receivable, modified in period to total financing receivables (in percent) |  | 3.00% |  | 3.00% |
Financing receivable modification, increase (decrease) from modification |  |  | $ 0 |  |
Financing receivable, modified, payment deferral, period | 0 years |  | 0 years |  |
Financing receivable, modified, weighted average interest rate decrease from modification |  |  | 0.00% |  |
Accrued interest receivable |  |  |  |  |
Loans and Allowance for Credit Losses |  |  |  |  |
Accrued interest receivable | $ 2,400,000 |  | $ 2,400,000 |  |

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