| Financing Receivable Credit Quality Indicators [Table Text Block] |
| | | Term Loans Amortized Cost Basis by Origination Year | |
| (In Thousands of Dollars) | | | | | | | | | | | | | | | | | | | | | | | | | | Revolving | | | | | |
| As of March 31, 2026 | | 2026 | | | 2025 | | | 2024 | | | 2023 | | | 2022 | | | Prior | | | Loans | | | Total | |
| Commercial real estate - Owner occupied: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Risk Rating | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | $ | 6,435 | | | $ | 97,972 | | | $ | 93,041 | | | $ | 75,052 | | | $ | 69,005 | | | $ | 259,001 | | | $ | 6,180 | | | $ | 606,686 | |
| Special mention | | | 0 | | | | 0 | | | | 1,554 | | | | 4,670 | | | | 363 | | | | 1,276 | | | | 0 | | | | 7,863 | |
| Substandard | | | 0 | | | | 0 | | | | 0 | | | | 4,989 | | | | 4,840 | | | | 2,161 | | | | 0 | | | | 11,990 | |
| Total commercial real estate - Owner occupied loans | | $ | 6,435 | | | $ | 97,972 | | | $ | 94,595 | | | $ | 84,711 | | | $ | 74,208 | | | $ | 262,438 | | | $ | 6,180 | | | $ | 626,539 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Commercial real estate - Owner Occupied: Current period gross write-offs | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 1 | | | $ | 0 | | | $ | 1 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Commercial real estate - Non-owner occupied: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Risk Rating | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | $ | 14,550 | | | $ | 91,541 | | | $ | 104,325 | | | $ | 97,891 | | | $ | 193,371 | | | $ | 467,941 | | | $ | 22,322 | | | $ | 991,941 | |
| Special mention | | | 0 | | | | 0 | | | | 0 | | | | 0 | | | | 3,112 | | | | 3,893 | | | | 290 | | | | 7,295 | |
| Substandard | | | 0 | | | | 0 | | | | 4,146 | | | | 0 | | | | 0 | | | | 42,121 | | | | 0 | | | | 46,267 | |
| Doubtful | | | 0 | | | | 0 | | | | 0 | | | | 0 | | | | 1,865 | | | | 0 | | | | 0 | | | | 1,865 | |
| Total commercial real estate - Non-owner occupied loans | | $ | 14,550 | | | $ | 91,541 | | | $ | 108,471 | | | $ | 97,891 | | | $ | 198,348 | | | $ | 513,955 | | | $ | 22,612 | | | $ | 1,047,368 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Commercial real estate - Non-owner occupied: Current period gross write-offs | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Commercial real estate - Farmland: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Risk Rating | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | $ | 6,968 | | | $ | 22,635 | | | $ | 22,991 | | | $ | 19,083 | | | $ | 36,266 | | | $ | 113,859 | | | $ | 7,177 | | | $ | 228,979 | |
| Special mention | | | 0 | | | | 0 | | | | 0 | | | | 0 | | | | 0 | | | | 0 | | | | 0 | | | | 0 | |
| Substandard | | | 0 | | | | 0 | | | | 0 | | | | 1,839 | | | | 0 | | | | 637 | | | | 0 | | | | 2,476 | |
| Total commercial real estate - Farmland loans | | $ | 6,968 | | | $ | 22,635 | | | $ | 22,991 | | | $ | 20,922 | | | $ | 36,266 | | | $ | 114,496 | | | $ | 7,177 | | | $ | 231,455 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Commercial real estate - Farmland: Current period gross write-offs | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Commercial real estate - Other: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Risk Rating | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | $ | 5,707 | | | $ | 68,403 | | | $ | 64,518 | | | $ | 103,518 | | | $ | 52,205 | | | $ | 68,358 | | | $ | 21,762 | | | $ | 384,471 | |
| Special mention | | | 0 | | | | 0 | | | | 0 | | | | 9,306 | | | | 0 | | | | 165 | | | | 0 | | | | 9,471 | |
| Substandard | | | 0 | | | | 2,953 | | | | 0 | | | | 1,465 | | | | 3,499 | | | | 563 | | | | 946 | | | | 9,426 | |
| Total commercial real estate - Other loans | | $ | 5,707 | | | $ | 71,356 | | | $ | 64,518 | | | $ | 114,289 | | | $ | 55,704 | | | $ | 69,086 | | | $ | 22,708 | | | $ | 403,368 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Commercial real estate - Other: Current period gross write-offs | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | |
| | | Term Loans Amortized Cost Basis by Origination Year (Continued) | |
| (In Thousands of Dollars) | | | | | | | | | | | | | | | | | | | | | | | | | | Revolving | | | | | |
| As of March 31, 2026 | | 2026 | | | 2025 | | | 2024 | | | 2023 | | | 2022 | | | Prior | | | Loans | | | Total | |
| Commercial - Commercial and industrial: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Risk Rating | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | $ | 21,865 | | | $ | 107,794 | | | $ | 99,324 | | | $ | 73,119 | | | $ | 50,748 | | | $ | 46,938 | | | $ | 164,156 | | | $ | 563,944 | |
| Special mention | | | 0 | | | | 0 | | | | 0 | | | | 0 | | | | 2,026 | | | | 330 | | | | 4,591 | | | | 6,947 | |
| Substandard | | | 0 | | | | 970 | | | | 5,828 | | | | 3,694 | | | | 7,057 | | | | 2,706 | | | | 1,811 | | | | 22,066 | |
| Total commercial - Commercial and industrial loans | | $ | 21,865 | | | $ | 108,764 | | | $ | 105,152 | | | $ | 76,813 | | | $ | 59,831 | | | $ | 49,974 | | | $ | 170,558 | | | $ | 592,957 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Commercial - Commercial and industrial: Current period gross write-offs | | $ | 0 | | | $ | 10 | | | $ | 6 | | | $ | 31 | | | $ | 86 | | | $ | 158 | | | $ | 0 | | | $ | 291 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Commercial - Agricultural: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Risk Rating | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | $ | 1,993 | | | $ | 11,287 | | | $ | 6,205 | | | $ | 7,187 | | | $ | 7,376 | | | $ | 3,200 | | | $ | 15,895 | | | $ | 53,143 | |
| Special mention | | | 0 | | | | 0 | | | | 0 | | | | 0 | | | | 0 | | | | 0 | | | | 0 | | | | 0 | |
| Substandard | | | 0 | | | | 0 | | | | 29 | | | | 0 | | | | 26 | | | | 106 | | | | 0 | | | | 161 | |
| Total commercial - Agricultural loans | | $ | 1,993 | | | $ | 11,287 | | | $ | 6,234 | | | $ | 7,187 | | | $ | 7,402 | | | $ | 3,306 | | | $ | 15,895 | | | $ | 53,304 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Commercial - Agricultural: Current period gross write-offs | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Residential real estate - 1-4 family residential: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Payment Performance | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Performing | | $ | 27,635 | | | $ | 158,176 | | | $ | 127,731 | | | $ | 108,168 | | | $ | 191,644 | | | $ | 596,855 | | | $ | 5,293 | | | $ | 1,215,502 | |
| Nonperforming | | | 0 | | | | 0 | | | | 0 | | | | 198 | | | | 999 | | | | 4,017 | | | | 0 | | | | 5,214 | |
| Total residential real estate - 1-4 family residential loans | | $ | 27,635 | | | $ | 158,176 | | | $ | 127,731 | | | $ | 108,366 | | | $ | 192,643 | | | $ | 600,872 | | | $ | 5,293 | | | $ | 1,220,716 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Residential real estate - 1-4 family residential: Current period gross write-offs | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 32 | | | $ | 0 | | | $ | 32 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Residential real estate - Home equity lines of credit: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Payment Performance | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Performing | | $ | 0 | | | $ | 100 | | | $ | 395 | | | $ | 163 | | | $ | 514 | | | $ | 7,606 | | | $ | 339,630 | | | $ | 348,408 | |
| Nonperforming | | | 0 | | | | 101 | | | | 0 | | | | 203 | | | | 558 | | | | 648 | | | | 0 | | | | 1,510 | |
| Total residential real estate - Home equity lines of credit loans | | $ | 0 | | | $ | 201 | | | $ | 395 | | | $ | 366 | | | $ | 1,072 | | | $ | 8,254 | | | $ | 339,630 | | | $ | 349,918 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Residential real estate - Home equity lines of credit: Current period gross write-offs | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 51 | | | $ | 0 | | | $ | 51 | |
| | | Term Loans Amortized Cost Basis by Origination Year (Continued) | |
| (In Thousands of Dollars) | | | | | | | | | | | | | | | | | | | | | | | | | | Revolving | | | | | |
| As of March 31, 2026 | | 2026 | | | 2025 | | | 2024 | | | 2023 | | | 2022 | | | Prior | | | Loans | | | Total | |
| Consumer - Indirect: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Payment Performance | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Performing | | $ | 25,493 | | | $ | 73,812 | | | $ | 49,673 | | | $ | 34,384 | | | $ | 26,636 | | | $ | 32,247 | | | $ | 0 | | | $ | 242,245 | |
| Nonperforming | | | 0 | | | | 34 | | | | 130 | | | | 57 | | | | 70 | | | | 267 | | | | 0 | | | | 558 | |
| Total consumer - Indirect loans | | $ | 25,493 | | | $ | 73,846 | | | $ | 49,803 | | | $ | 34,441 | | | $ | 26,706 | | | $ | 32,514 | | | $ | 0 | | | $ | 242,803 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Consumer - Indirect: Current period gross write-offs | | $ | 0 | | | $ | 16 | | | $ | 42 | | | $ | 46 | | | $ | 0 | | | $ | 189 | | | $ | 0 | | | $ | 293 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Consumer - Direct: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Payment Performance | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Performing | | $ | 1,608 | | | $ | 4,673 | | | $ | 2,043 | | | $ | 1,441 | | | $ | 846 | | | $ | 10,997 | | | $ | 0 | | | $ | 21,608 | |
| Nonperforming | | | 0 | | | | 0 | | | | 1 | | | | 0 | | | | 0 | | | | 3 | | | | 0 | | | | 4 | |
| Total consumer - Direct loans | | $ | 1,608 | | | $ | 4,673 | | | $ | 2,044 | | | $ | 1,441 | | | $ | 846 | | | $ | 11,000 | | | $ | 0 | | | $ | 21,612 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Consumer - Direct: Current period gross write-offs | | $ | 0 | | | $ | 0 | | | $ | 6 | | | $ | 0 | | | $ | 5 | | | $ | 10 | | | $ | 0 | | | $ | 21 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Consumer - Other: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Payment Performance | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Performing | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 4 | | | $ | 690 | | | $ | 9,233 | | | $ | 9,927 | |
| Nonperforming | | | 0 | | | | 0 | | | | 0 | | | | 0 | | | | 97 | | | | 0 | | | | 0 | | | | 97 | |
| Total consumer - Other loans | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 101 | | | $ | 690 | | | $ | 9,233 | | | $ | 10,024 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Consumer - Other: Current period gross write-offs | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 1 | | | $ | 39 | | | $ | 40 | |
| | | Term Loans Amortized Cost Basis by Origination Year | |
| (In Thousands of Dollars) | | | | | | | | | | | | | | | | | | | | | | | | | | Revolving | | | | | |
| As of December 31, 2025 | | 2025 | | | 2024 | | | 2023 | | | 2022 | | | 2021 | | | Prior | | | Loans | | | Total | |
| Commercial real estate - Owner occupied: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Risk Rating | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | $ | 54,226 | | | $ | 47,332 | | | $ | 49,344 | | | $ | 40,512 | | | $ | 55,333 | | | $ | 133,226 | | | $ | 3,195 | | | $ | 383,168 | |
| Special mention | | | 0 | | | | 648 | | | | 4,729 | | | | 0 | | | | 1,069 | | | | 74 | | | | 0 | | | | 6,520 | |
| Substandard | | | 0 | | | | 0 | | | | 1,346 | | | | 430 | | | | 1 | | | | 1,406 | | | | 0 | | | | 3,183 | |
| Total commercial real estate - Owner occupied loans | | $ | 54,226 | | | $ | 47,980 | | | $ | 55,419 | | | $ | 40,942 | | | $ | 56,403 | | | $ | 134,706 | | | $ | 3,195 | | | $ | 392,871 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Commercial real estate - Owner Occupied: Current period gross write-offs | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 22 | | | $ | 75 | | | $ | 0 | | | $ | 97 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Commercial real estate - Non-owner occupied: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Risk Rating | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | $ | 79,473 | | | $ | 71,707 | | | $ | 47,336 | | | $ | 115,103 | | | $ | 75,125 | | | $ | 257,596 | | | $ | 20,072 | | | $ | 666,412 | |
| Special mention | | | 0 | | | | 0 | | | | 0 | | | | 3,126 | | | | 0 | | | | 4,103 | | | | 215 | | | | 7,444 | |
| Substandard | | | 0 | | | | 21 | | | | 124 | | | | 1,870 | | | | 10,528 | | | | 21,812 | | | | 0 | | | | 34,355 | |
| Doubtful | | | 0 | | | | 0 | | | | 0 | | | | 0 | | | | 1,865 | | | | 0 | | | | 0 | | | | 1,865 | |
| Total commercial real estate - Non-owner occupied loans | | $ | 79,473 | | | $ | 71,728 | | | $ | 47,460 | | | $ | 120,099 | | | $ | 87,518 | | | $ | 283,511 | | | $ | 20,287 | | | $ | 710,076 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Commercial real estate - Non-owner occupied: Current period gross write-offs | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 1,970 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 1,970 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Commercial real estate - Farmland: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Risk Rating | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | $ | 20,347 | | | $ | 19,990 | | | $ | 20,478 | | | $ | 35,611 | | | $ | 16,728 | | | $ | 91,987 | | | $ | 3,568 | | | $ | 208,709 | |
| Substandard | | | 0 | | | | 0 | | | | 1,872 | | | | 0 | | | | 352 | | | | 298 | | | | 0 | | | | 2,522 | |
| Total commercial real estate - Farmland loans | | $ | 20,347 | | | $ | 19,990 | | | $ | 22,350 | | | $ | 35,611 | | | $ | 17,080 | | | $ | 92,285 | | | $ | 3,568 | | | $ | 211,231 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Commercial real estate - Farmland: Current period gross write-offs | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 44 | | | $ | 0 | | | $ | 44 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Commercial real estate - Other: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Risk Rating | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | $ | 62,052 | | | $ | 50,127 | | | $ | 48,815 | | | $ | 65,170 | | | $ | 23,895 | | | $ | 24,391 | | | $ | 1,351 | | | $ | 275,801 | |
| Special mention | | | 0 | | | | 0 | | | | 9,279 | | | | 0 | | | | 0 | | | | 1,364 | | | | 0 | | | | 10,643 | |
| Substandard | | | 2,965 | | | | 0 | | | | 981 | | | | 3,496 | | | | 112 | | | | 10 | | | | 0 | | | | 7,564 | |
| Total commercial real estate - Other loans | | $ | 65,017 | | | $ | 50,127 | | | $ | 59,075 | | | $ | 68,666 | | | $ | 24,007 | | | $ | 25,765 | | | $ | 1,351 | | | $ | 294,008 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Commercial real estate - Other: Current period gross write-offs | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 2,454 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 2,454 | |
| | | Term Loans Amortized Cost Basis by Origination Year (Continued) | |
| (In Thousands of Dollars) | | | | | | | | | | | | | | | | | | | | | | | | | | Revolving | | | | | |
| As of December 31, 2025 | | 2025 | | | 2024 | | | 2023 | | | 2022 | | | 2021 | | | Prior | | | Loans | | | Total | |
| Commercial - Commercial and industrial: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Risk Rating | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | $ | 65,564 | | | $ | 63,502 | | | $ | 52,078 | | | $ | 38,843 | | | $ | 11,342 | | | $ | 19,002 | | | $ | 80,655 | | | $ | 330,986 | |
| Special mention | | | 0 | | | | 0 | | | | 0 | | | | 2,158 | | | | 253 | | | | 0 | | | | 2,050 | | | | 4,461 | |
| Substandard | | | 8 | | | | 210 | | | | 21 | | | | 2,612 | | | | 719 | | | | 1,163 | | | | 1,557 | | | | 6,290 | |
| Total commercial - Commercial and industrial loans | | $ | 65,572 | | | $ | 63,712 | | | $ | 52,099 | | | $ | 43,613 | | | $ | 12,314 | | | $ | 20,165 | | | $ | 84,262 | | | $ | 341,737 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Commercial - Commercial and industrial: Current period gross write-offs | | $ | 345 | | | $ | 122 | | | $ | 230 | | | $ | 311 | | | $ | 127 | | | $ | 116 | | | $ | 28 | | | $ | 1,279 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Commercial - Agricultural: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Risk Rating | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | $ | 11,929 | | | $ | 6,738 | | | $ | 8,151 | | | $ | 8,058 | | | $ | 2,502 | | | $ | 1,028 | | | $ | 16,523 | | | $ | 54,929 | |
| Special mention | | | 0 | | | | 0 | | | | 0 | | | | 0 | | | | 0 | | | | 0 | | | | 0 | | | | 0 | |
| Substandard | | | 0 | | | | 32 | | | | 0 | | | | 20 | | | | 18 | | | | 90 | | | | 0 | | | | 160 | |
| Total commercial - Agricultural loans | | $ | 11,929 | | | $ | 6,770 | | | $ | 8,151 | | | $ | 8,078 | | | $ | 2,520 | | | $ | 1,118 | | | $ | 16,523 | | | $ | 55,089 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Commercial - Agricultural: Current period gross write-offs | | $ | 0 | | | $ | 114 | | | $ | 16 | | | $ | 38 | | | $ | 26 | | | $ | 18 | | | $ | 0 | | | $ | 212 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Residential real estate - 1-4 family residential: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Payment Performance | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Performing | | $ | 90,911 | | | $ | 88,021 | | | $ | 58,641 | | | $ | 142,333 | | | $ | 140,411 | | | $ | 323,056 | | | $ | 4,112 | | | $ | 847,485 | |
| Nonperforming | | | 0 | | | | 0 | | | | 396 | | | | 574 | | | | 238 | | | | 2,487 | | | | 0 | | | | 3,695 | |
| Total residential real estate - 1-4 family residential loans | | $ | 90,911 | | | $ | 88,021 | | | $ | 59,037 | | | $ | 142,907 | | | $ | 140,649 | | | $ | 325,543 | | | $ | 4,112 | | | $ | 851,180 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Residential real estate - 1-4 family residential: Current period gross write-offs | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 150 | | | $ | 67 | | | $ | 0 | | | $ | 217 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Residential real estate - Home equity lines of credit: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Payment Performance | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Performing | | $ | 0 | | | $ | 24 | | | $ | 135 | | | $ | 296 | | | $ | 211 | | | $ | 4,963 | | | $ | 175,044 | | | $ | 180,673 | |
| Nonperforming | | | 0 | | | | 0 | | | | 7 | | | | 438 | | | | 0 | | | | 668 | | | | 0 | | | | 1,113 | |
| Total residential real estate - Home equity lines of credit loans | | $ | 0 | | | $ | 24 | | | $ | 142 | | | $ | 734 | | | $ | 211 | | | $ | 5,631 | | | $ | 175,044 | | | $ | 181,786 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Residential real estate - Home equity lines of credit: Current period gross write-offs | | $ | 0 | | | $ | 0 | | | $ | 10 | | | $ | 28 | | | $ | 0 | | | $ | 13 | | | $ | 0 | | | $ | 51 | |
| | | Term Loans Amortized Cost Basis by Origination Year (Continued) | |
| (In Thousands of Dollars) | | | | | | | | | | | | | | | | | | | | | | | | | | Revolving | | | | | |
| As of December 31, 2025 | | 2025 | | | 2024 | | | 2023 | | | 2022 | | | 2021 | | | Prior | | | Loans | | | Total | |
| Consumer - Indirect: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Payment Performance | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Performing | | $ | 78,564 | | | $ | 55,727 | | | $ | 38,329 | | | $ | 30,359 | | | $ | 15,556 | | | $ | 21,052 | | | $ | 0 | | | $ | 239,587 | |
| Nonperforming | | | 2 | | | | 125 | | | | 101 | | | | 102 | | | | 86 | | | | 107 | | | | 0 | | | | 523 | |
| Total consumer - Indirect loans | | $ | 78,566 | | | $ | 55,852 | | | $ | 38,430 | | | $ | 30,461 | | | $ | 15,642 | | | $ | 21,159 | | | $ | 0 | | | $ | 240,110 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Consumer - Indirect: Current period gross write-offs | | $ | 22 | | | $ | 191 | | | $ | 93 | | | $ | 40 | | | $ | 93 | | | $ | 489 | | | $ | 0 | | | $ | 928 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Consumer - Direct: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Payment Performance | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Performing | | $ | 4,010 | | | $ | 1,580 | | | $ | 1,280 | | | $ | 871 | | | $ | 647 | | | $ | 8,142 | | | $ | 0 | | | $ | 16,530 | |
| Nonperforming | | | 0 | | | | 0 | | | | 0 | | | | 4 | | | | 0 | | | | 17 | | | | 0 | | | | 21 | |
| Total consumer - Direct loans | | $ | 4,010 | | | $ | 1,580 | | | $ | 1,280 | | | $ | 875 | | | $ | 647 | | | $ | 8,159 | | | $ | 0 | | | $ | 16,551 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Consumer - Direct: Current period gross write-offs | | $ | 0 | | | $ | 6 | | | $ | 16 | | | $ | 9 | | | $ | 0 | | | $ | 28 | | | $ | 0 | | | $ | 59 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Consumer - Other: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Payment Performance | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Performing | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 4 | | | $ | 64 | | | $ | 418 | | | $ | 9,491 | | | $ | 9,977 | |
| Nonperforming | | | 0 | | | | 0 | | | | 0 | | | | 97 | | | | 0 | | | | 0 | | | | 0 | | | | 97 | |
| Total consumer - Other loans | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 101 | | | $ | 64 | | | $ | 418 | | | $ | 9,491 | | | $ | 10,074 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Consumer - Other: Current period gross write-offs | | $ | 0 | | | $ | 1 | | | $ | 5 | | | $ | 0 | | | $ | 1 | | | $ | 189 | | | $ | 0 | | | $ | 196 | |
|