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Loans - Loan Portfolio and Allowance for Credit Losses (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Jun. 30, 2025 | Jun. 29, 2025 | Dec. 31, 2024 | Sep. 30, 2024 | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | --- | --- | --- | --- | --- | ---
Loans [Abstract] |  |  |  |  |  |  |
Total loans | $ 2,335,388 |  |  | $ 2,313,242 |  |  |
Allowance for credit losses - loans | 22,454 | $ 22,109 | $ 22,109 | 21,699 | $ 21,695 | $ 22,797 | $ 21,153
Net loans | 2,312,934 |  |  | 2,291,543 |  |  |
Residential [Member] |  |  |  |  |  |  |
Loans [Abstract] |  |  |  |  |  |  |
Total loans | 293,365 |  |  | 301,735 |  |  |
Commercial [Member] |  |  |  |  |  |  |
Loans [Abstract] |  |  |  |  |  |  |
Total loans | 1,180,655 |  |  | 1,121,435 |  |  |
Construction [Member] |  |  |  |  |  |  |
Loans [Abstract] |  |  |  |  |  |  |
Total loans | 107,867 |  |  | 164,326 |  |  |
Real Estate Loans [Member] | Residential [Member] |  |  |  |  |  |  |
Loans [Abstract] |  |  |  |  |  |  |
Total loans | 344,790 |  |  | 351,398 |  |  |
Allowance for credit losses - loans | 3,210 | 3,062 |  | 1,940 | 1,986 | 2,355 | 2,354
Real Estate Loans [Member] | Commercial [Member] |  |  |  |  |  |  |
Loans [Abstract] |  |  |  |  |  |  |
Total loans | 1,180,655 |  |  | 1,121,435 |  |  |
Allowance for credit losses - loans | 9,453 | 9,898 |  | 9,174 | 9,287 | 10,283 | 9,178
Real Estate Loans [Member] | Agricultural [Member] |  |  |  |  |  |  |
Loans [Abstract] |  |  |  |  |  |  |
Total loans | 342,487 |  |  | 327,722 |  |  |
Allowance for credit losses - loans | 4,804 | 4,542 |  | 3,529 | 3,815 | 3,770 | 3,264
Real Estate Loans [Member] | Construction [Member] |  |  |  |  |  |  |
Loans [Abstract] |  |  |  |  |  |  |
Total loans | 107,867 |  |  | 164,326 |  |  |
Allowance for credit losses - loans | 967 | 1,273 |  | 1,402 | 1,471 | 1,627 | 1,950
Consumer [Member] |  |  |  |  |  |  |
Loans [Abstract] |  |  |  |  |  |  |
Total loans | 109,458 |  |  | 109,505 |  |  |
Allowance for credit losses - loans | 1,325 | 1,119 |  | 1,338 | 1,163 | 1,008 | 1,412
Other Commercial Loans [Member] |  |  |  |  |  |  |
Loans [Abstract] |  |  |  |  |  |  |
Total loans | 171,345 |  |  | 155,012 |  |  |
Allowance for credit losses - loans | 2,431 | 1,993 |  | 3,766 | 2,028 | 3,459 | 2,313
Other Agricultural Loans [Member] |  |  |  |  |  |  |
Loans [Abstract] |  |  |  |  |  |  |
Total loans | 27,142 |  |  | 29,662 |  |  |
Allowance for credit losses - loans | 125 | 132 |  | 133 | 116 | 206 | 270
State and Political Subdivision Loans [Member] |  |  |  |  |  |  |
Loans [Abstract] |  |  |  |  |  |  |
Total loans | 51,644 |  |  | 54,182 |  |  |
Allowance for credit losses - loans | $ 58 | $ 56 |  | $ 61 | $ 63 | $ 63 | $ 45

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