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Borrowed Funds - Subordinated Debt (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2021 | Nov. 30, 2020 | Mar. 31, 2024 | Dec. 31, 2023 | Mar. 31, 2007
Subordinated Debt |  |  |  |  |
Balance at end of period |  |  | $ 73,602 | $ 73,540 |
Subordinated Debt |  |  |  |  |
Subordinated Debt |  |  |  |  |
Balance at end of period |  |  | 73,602 | 73,540 |
Average balance during the period |  |  | 73,571 | 73,415 |
Maximum month-end balance |  |  | $ 73,602 | $ 73,540 |
Weighted-average rate during the period |  |  | 4.07% | 4.38% |
Weighted-average rate at end of period |  |  | 4.02% | 4.02% |
Face amount of debt issued | $ 30,000 | $ 40,000 |  |  |
Term of debt instrument | 10 years | 10 years |  |  |
Interest rate on debt security | 3.25% | 4.25% |  |  |
Subordinated Debt | SOFR |  |  |  |  |
Subordinated Debt |  |  |  |  |
Variable rate basis spread | 2.54% | 4.01% |  |  |
Subordinated Debt | Subordinated Debentures |  |  |  |  |
Subordinated Debt |  |  |  |  |
Face amount of debt issued |  |  |  |  | $ 4,000
Subordinated Debt | Subordinated Debentures | SOFR |  |  |  |  |
Subordinated Debt |  |  |  |  |
Variable rate basis spread |  |  | 0.26% |  |

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