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Loans, Allowance for Credit Losses - Loans and Amortized Cost Basis of Loans Under CECL Methodology (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Jun. 30, 2024 | Dec. 31, 2023 | Sep. 30, 2023 | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | --- | --- | --- | --- | ---
Loans And Leases Receivable, Allowance For Loan Losses [Abstract] |  |  |  |  |  |
Collectively evaluated for impairment | $ 20,187 |  | $ 19,181 |  |  |
Individually evaluated for impairment | 1,508 |  | 1,972 |  |  |
Total Allowance for Credit Losses - Loans for impairment | 21,695 | $ 22,797 | 21,153 | $ 21,455 | $ 21,652 | $ 18,552
Collectively evaluated for impairment | 2,309,860 |  | 2,235,955 |  |  |
Individually evaluated for impairment | 21,142 |  | 12,881 |  |  |
Total Loans | 2,331,002 |  | 2,248,836 |  |  |
Residential [Member] |  |  |  |  |  |
Loans And Leases Receivable, Allowance For Loan Losses [Abstract] |  |  |  |  |  |
Total Loans | 303,479 |  | 310,199 |  |  |
Commercial [Member] |  |  |  |  |  |
Loans And Leases Receivable, Allowance For Loan Losses [Abstract] |  |  |  |  |  |
Total Loans | 1,110,548 |  | 1,092,887 |  |  |
Construction [Member] |  |  |  |  |  |
Loans And Leases Receivable, Allowance For Loan Losses [Abstract] |  |  |  |  |  |
Total Loans | 178,706 |  | 195,826 |  |  |
Real Estate Loans [Member] | Residential [Member] |  |  |  |  |  |
Loans And Leases Receivable, Allowance For Loan Losses [Abstract] |  |  |  |  |  |
Collectively evaluated for impairment | 1,947 |  | 2,285 |  |  |
Individually evaluated for impairment | 39 |  | 69 |  |  |
Total Allowance for Credit Losses - Loans for impairment | 1,986 | 2,355 | 2,354 | 2,565 | 2,675 | 1,056
Collectively evaluated for impairment | 351,748 |  | 358,358 |  |  |
Individually evaluated for impairment | 1,506 |  | 1,632 |  |  |
Total Loans | 353,254 |  | 359,990 |  |  |
Real Estate Loans [Member] | Commercial [Member] |  |  |  |  |  |
Loans And Leases Receivable, Allowance For Loan Losses [Abstract] |  |  |  |  |  |
Collectively evaluated for impairment | 9,188 |  | 9,033 |  |  |
Individually evaluated for impairment | 99 |  | 145 |  |  |
Total Allowance for Credit Losses - Loans for impairment | 9,287 | 10,283 | 9,178 | 9,185 | 9,274 | 10,120
Collectively evaluated for impairment | 1,098,389 |  | 1,090,217 |  |  |
Individually evaluated for impairment | 12,159 |  | 2,670 |  |  |
Total Loans | 1,110,548 |  | 1,092,887 |  |  |
Real Estate Loans [Member] | Agricultural [Member] |  |  |  |  |  |
Loans And Leases Receivable, Allowance For Loan Losses [Abstract] |  |  |  |  |  |
Collectively evaluated for impairment | 3,813 |  | 3,247 |  |  |
Individually evaluated for impairment | 2 |  | 17 |  |  |
Total Allowance for Credit Losses - Loans for impairment | 3,815 | 3,770 | 3,264 | 3,475 | 3,579 | 4,589
Collectively evaluated for impairment | 329,318 |  | 311,500 |  |  |
Individually evaluated for impairment | 2,416 |  | 3,302 |  |  |
Total Loans | 331,734 |  | 314,802 |  |  |
Real Estate Loans [Member] | Construction [Member] |  |  |  |  |  |
Loans And Leases Receivable, Allowance For Loan Losses [Abstract] |  |  |  |  |  |
Collectively evaluated for impairment | 1,471 |  | 1,664 |  |  |
Individually evaluated for impairment | 0 |  | 286 |  |  |
Total Allowance for Credit Losses - Loans for impairment | 1,471 | 1,627 | 1,950 | 1,833 | 1,667 | 801
Collectively evaluated for impairment | 176,758 |  | 193,469 |  |  |
Individually evaluated for impairment | 1,948 |  | 2,357 |  |  |
Total Loans | 178,706 |  | 195,826 |  |  |
Consumer [Member] |  |  |  |  |  |
Loans And Leases Receivable, Allowance For Loan Losses [Abstract] |  |  |  |  |  |
Collectively evaluated for impairment | 510 |  | 557 |  |  |
Individually evaluated for impairment | 857 |  | 939 |  |  |
Total Allowance for Credit Losses - Loans for impairment | 1,367 | 1,211 | 1,496 | 1,720 | 1,259 | 135
Collectively evaluated for impairment | 142,107 |  | 60,377 |  |  |
Individually evaluated for impairment | 957 |  | 939 |  |  |
Total Loans | 143,064 |  | 61,316 |  |  |
Other Commercial Loans [Member] |  |  |  |  |  |
Loans And Leases Receivable, Allowance For Loan Losses [Abstract] |  |  |  |  |  |
Collectively evaluated for impairment | 1,313 |  | 1,713 |  |  |
Individually evaluated for impairment | 511 |  | 516 |  |  |
Total Allowance for Credit Losses - Loans for impairment | 1,824 | 3,256 | 2,229 | 2,072 | 2,477 | 1,040
Collectively evaluated for impairment | 132,323 |  | 134,472 |  |  |
Individually evaluated for impairment | 1,962 |  | 1,696 |  |  |
Total Loans | 134,285 |  | 136,168 |  |  |
Other Agricultural Loans [Member] |  |  |  |  |  |
Loans And Leases Receivable, Allowance For Loan Losses [Abstract] |  |  |  |  |  |
Collectively evaluated for impairment | 116 |  | 270 |  |  |
Individually evaluated for impairment | 0 |  | 0 |  |  |
Total Allowance for Credit Losses - Loans for impairment | 116 | 206 | 270 | 229 | 268 | 489
Collectively evaluated for impairment | 24,343 |  | 30,388 |  |  |
Individually evaluated for impairment | 194 |  | 285 |  |  |
Total Loans | 24,537 |  | 30,673 |  |  |
State and Political Subdivision Loans [Member] |  |  |  |  |  |
Loans And Leases Receivable, Allowance For Loan Losses [Abstract] |  |  |  |  |  |
Collectively evaluated for impairment | 63 |  | 45 |  |  |
Individually evaluated for impairment | 0 |  | 0 |  |  |
Total Allowance for Credit Losses - Loans for impairment | 63 | 63 | 45 | 48 | 52 | 322
Collectively evaluated for impairment | 54,874 |  | 57,174 |  |  |
Individually evaluated for impairment | 0 |  | 0 |  |  |
Total Loans | 54,874 |  | 57,174 |  |  |
Unallocated [Member] |  |  |  |  |  |
Loans And Leases Receivable, Allowance For Loan Losses [Abstract] |  |  |  |  |  |
Collectively evaluated for impairment | 1,766 |  | 367 |  |  |
Individually evaluated for impairment | 0 |  | 0 |  |  |
Total Allowance for Credit Losses - Loans for impairment | 1,766 | $ 26 | 367 | $ 328 | $ 401 | $ 0
Collectively evaluated for impairment | 0 |  | 0 |  |  |
Individually evaluated for impairment | 0 |  | 0 |  |  |
Total Loans | $ 0 |  | $ 0 |  |  |

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