| Financing Receivable Credit Quality Indicators [Table Text Block] |
| | | June 30, 2026 | |
| | | 2026 | | | 2025 | | | 2024 | | | 2023 | | | 2022 | | | Prior | | | Revolving Loans | | | Total Loans | |
| | | (In Thousands) | |
| RESIDENTIAL 1-4 FAMILY | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | $ | 13,410 | | | $ | 16,430 | | | $ | 14,306 | | | $ | 20,430 | | | $ | 24,069 | | | $ | 51,984 | | | $ | 1,743 | | | $ | 142,372 | |
| Substandard | | | - | | | | - | | | | - | | | | - | | | | 712 | | | | 664 | | | | - | | | | 1,376 | |
| Total Residential 1-4 family | | | 13,410 | | | | 16,430 | | | | 14,306 | | | | 20,430 | | | | 24,781 | | | | 52,648 | | | | 1,743 | | | | 143,748 | |
| Current-period gross charge-offs | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | |
| RESIDENTIAL 1-4 FAMILY CONSTRUCTION | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | | 17,404 | | | | 16,612 | | | | 640 | | | | - | | | | 10,129 | | | | - | | | | 494 | | | | 45,279 | |
| Special Mention | | | - | | | | - | | | | 349 | | | | - | | | | - | | | | - | | | | - | | | | 349 | |
| Total Residential 1-4 family construction | | | 17,404 | | | | 16,612 | | | | 989 | | | | - | | | | 10,129 | | | | - | | | | 494 | | | | 45,628 | |
| Current-period gross charge-offs | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | |
| COMMERCIAL REAL ESTATE | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | | 55,737 | | | | 47,438 | | | | 68,161 | | | | 60,963 | | | | 169,996 | | | | 232,554 | | | | 38,573 | | | | 673,422 | |
| Special Mention | | | - | | | | - | | | | - | | | | 784 | | | | 380 | | | | 1,966 | | | | 2,803 | | | | 5,933 | |
| Substandard | | | - | | | | - | | | | - | | | | 487 | | | | - | | | | 4,539 | | | | - | | | | 5,026 | |
| Total Commercial real estate | | | 55,737 | | | | 47,438 | | | | 68,161 | | | | 62,234 | | | | 170,376 | | | | 239,059 | | | | 41,376 | | | | 684,381 | |
| Current-period gross charge-offs | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | |
| COMMERCIAL CONSTRUCTION AND DEVELOPMENT | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | | 5,576 | | | | 37,687 | | | | 11,524 | | | | 7,352 | | | | 12,711 | | | | 17,249 | | | | 5,089 | | | | 97,188 | |
| Special Mention | | | - | | | | - | | | | - | | | | 755 | | | | - | | | | - | | | | - | | | | 755 | |
| Substandard | | | - | | | | - | | | | - | | | | - | | | | - | | | | 908 | | | | - | | | | 908 | |
| Total Commercial construction and development | | | 5,576 | | | | 37,687 | | | | 11,524 | | | | 8,107 | | | | 12,711 | | | | 18,157 | | | | 5,089 | | | | 98,851 | |
| Current-period gross charge-offs | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | |
| FARMLAND | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | | 8,821 | | | | 27,434 | | | | 18,914 | | | | 14,120 | | | | 25,211 | | | | 56,659 | | | | 1,805 | | | | 152,964 | |
| Special Mention | | | 556 | | | | - | | | | - | | | | 1,099 | | | | 39 | | | | 66 | | | | - | | | | 1,760 | |
| Substandard | | | - | | | | - | | | | 237 | | | | - | | | | 1,118 | | | | 1,140 | | | | 56 | | | | 2,551 | |
| Total Farmland | | | 9,377 | | | | 27,434 | | | | 19,151 | | | | 15,219 | | | | 26,368 | | | | 57,865 | | | | 1,861 | | | | 157,275 | |
| Current-period gross charge-offs | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | |
| HOME EQUITY | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | | 4,876 | | | | 1,855 | | | | 1,167 | | | | 870 | | | | 605 | | | | 1,908 | | | | 96,527 | | | | 107,808 | |
| Special Mention | | | - | | | | - | | | | - | | | | - | | | | - | | | | 18 | | | | 226 | | | | 244 | |
| Substandard | | | - | | | | - | | | | - | | | | - | | | | - | | | | 58 | | | | 519 | | | | 577 | |
| Total Home Equity | | | 4,876 | | | | 1,855 | | | | 1,167 | | | | 870 | | | | 605 | | | | 1,984 | | | | 97,272 | | | | 108,629 | |
| Current-period gross charge-offs | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | |
| CONSUMER | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | | 4,272 | | | | 6,033 | | | | 4,079 | | | | 2,639 | | | | 1,601 | | | | 905 | | | | 1,786 | | | | 21,315 | |
| Special Mention | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | 18 | | | | 18 | |
| Substandard | | | - | | | | 50 | | | | - | | | | 74 | | | | 2 | | | | - | | | | - | | | | 126 | |
| Total Consumer | | | 4,272 | | | | 6,083 | | | | 4,079 | | | | 2,713 | | | | 1,603 | | | | 905 | | | | 1,804 | | | | 21,459 | |
| Current-period gross charge-offs | | | - | | | | 65 | | | | 52 | | | | 13 | | | | 7 | | | | - | | | | 1 | | | | 138 | |
| COMMERCIAL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | | 23,750 | | | | 26,454 | | | | 23,370 | | | | 17,706 | | | | 7,827 | | | | 21,012 | | | | 39,339 | | | | 159,458 | |
| Special Mention | | | 139 | | | | - | | | | - | | | | 285 | | | | 142 | | | | 44 | | | | 192 | | | | 802 | |
| Substandard | | | - | | | | - | | | | 1,001 | | | | - | | | | - | | | | 110 | | | | 4 | | | | 1,115 | |
| Doubtful | | | - | | | | 82 | | | | - | | | | - | | | | - | | | | - | | | | - | | | | 82 | |
| Total Commercial | | | 23,889 | | | | 26,536 | | | | 24,371 | | | | 17,991 | | | | 7,969 | | | | 21,166 | | | | 39,535 | | | | 161,457 | |
| Current-period gross charge-offs | | | - | | | | - | | | | 63 | | | | 40 | | | | - | | | | 14 | | | | - | | | | 117 | |
| AGRICULTURAL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | | 20,201 | | | | 22,367 | | | | 8,762 | | | | 4,814 | | | | 3,270 | | | | 2,361 | | | | 69,578 | | | | 131,353 | |
| Special Mention | | | 1,054 | | | | 530 | | | | - | | | | 851 | | | | - | | | | - | | | | 549 | | | | 2,984 | |
| Substandard | | | - | | | | - | | | | - | | | | 1,450 | | | | - | | | | 902 | | | | 227 | | | | 2,579 | |
| Total Agricultural | | | 21,255 | | | | 22,897 | | | | 8,762 | | | | 7,115 | | | | 3,270 | | | | 3,263 | | | | 70,354 | | | | 136,916 | |
| Current-period gross charge-offs | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | |
| TOTAL LOANS | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | | 154,047 | | | | 202,310 | | | | 150,923 | | | | 128,894 | | | | 255,419 | | | | 384,632 | | | | 254,934 | | | | 1,531,159 | |
| Special Mention | | | 1,749 | | | | 530 | | | | 349 | | | | 3,774 | | | | 561 | | | | 2,094 | | | | 3,788 | | | | 12,845 | |
| Substandard | | | - | | | | 50 | | | | 1,238 | | | | 2,011 | | | | 1,832 | | | | 8,321 | | | | 806 | | | | 14,258 | |
| Doubtful | | | - | | | | 82 | | | | - | | | | - | | | | - | | | | - | | | | - | | | | 82 | |
| Total | | $ | 155,796 | | | $ | 202,972 | | | $ | 152,510 | | | $ | 134,679 | | | $ | 257,812 | | | $ | 395,047 | | | $ | 259,528 | | | $ | 1,558,344 | |
| | | December 31, 2025 | |
| | | 2025 | | | 2024 | | | 2023 | | | 2022 | | | 2021 | | | Prior | | | Revolving Loans | | | Total Loans | |
| | | (In Thousands) | |
| RESIDENTIAL 1-4 FAMILY | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | $ | 20,044 | | | $ | 15,428 | | | $ | 22,525 | | | $ | 29,851 | | | $ | 17,751 | | | $ | 40,339 | | | $ | 1,333 | | | $ | 147,271 | |
| Substandard | | | - | | | | - | | | | - | | | | 719 | | | | - | | | | 525 | | | | - | | | | 1,244 | |
| Total Residential 1-4 family | | | 20,044 | | | | 15,428 | | | | 22,525 | | | | 30,570 | | | | 17,751 | | | | 40,864 | | | | 1,333 | | | | 148,515 | |
| Current-period gross charge-offs | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | |
| RESIDENTIAL 1-4 FAMILY CONSTRUCTION | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | | 19,065 | | | | 3,975 | | | | 1,760 | | | | 10,129 | | | | - | | | | - | | | | - | | | | 34,929 | |
| Special Mention | | | - | | | | 349 | | | | - | | | | - | | | | - | | | | - | | | | - | | | | 349 | |
| Total Residential 1-4 family construction | | | 19,065 | | | | 4,324 | | | | 1,760 | | | | 10,129 | | | | - | | | | - | | | | - | | | | 35,278 | |
| Current-period gross charge-offs | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | |
| COMMERCIAL REAL ESTATE | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | | 41,530 | | | | 51,964 | | | | 63,566 | | | | 177,502 | | | | 112,350 | | | | 141,336 | | | | 39,155 | | | | 627,403 | |
| Special Mention | | | - | | | | - | | | | - | | | | 407 | | | | - | | | | 1,265 | | | | 2,989 | | | | 4,661 | |
| Substandard | | | - | | | | - | | | | 512 | | | | - | | | | 424 | | | | 2,970 | | | | - | | | | 3,906 | |
| Total Commercial real estate | | | 41,530 | | | | 51,964 | | | | 64,078 | | | | 177,909 | | | | 112,774 | | | | 145,571 | | | | 42,144 | | | | 635,970 | |
| Current-period gross charge-offs | | | - | | | | - | | | | - | | | | - | | | | - | | | | 33 | | | | - | | | | 33 | |
| COMMERCIAL CONSTRUCTION AND DEVELOPMENT | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | | 44,051 | | | | 26,041 | | | | 9,483 | | | | 14,272 | | | | 7,325 | | | | 11,853 | | | | 6,339 | | | | 119,364 | |
| Substandard | | | - | | | | - | | | | - | | | | - | | | | - | | | | 925 | | | | - | | | | 925 | |
| Total Commercial construction and development | | | 44,051 | | | | 26,041 | | | | 9,483 | | | | 14,272 | | | | 7,325 | | | | 12,778 | | | | 6,339 | | | | 120,289 | |
| Current-period gross charge-offs | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | |
| FARMLAND | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | | 30,610 | | | | 19,993 | | | | 16,219 | | | | 26,109 | | | | 17,580 | | | | 45,784 | | | | 1,961 | | | | 158,256 | |
| Special Mention | | | - | | | | - | | | | 827 | | | | 570 | | | | 62 | | | | 719 | | | | - | | | | 2,178 | |
| Substandard | | | - | | | | 188 | | | | 55 | | | | 1,118 | | | | - | | | | 729 | | | | 56 | | | | 2,146 | |
| Total Farmland | | | 30,610 | | | | 20,181 | | | | 17,101 | | | | 27,797 | | | | 17,642 | | | | 47,232 | | | | 2,017 | | | | 162,580 | |
| Current-period gross charge-offs | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | |
| HOME EQUITY | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | | 2,162 | | | | 1,218 | | | | 1,018 | | | | 2,804 | | | | 281 | | | | 2,227 | | | | 97,660 | | | | 107,370 | |
| Special Mention | | | - | | | | - | | | | - | | | | - | | | | - | | | | 21 | | | | 348 | | | | 369 | |
| Substandard | | | - | | | | - | | | | 33 | | | | - | | | | 40 | | | | 11 | | | | 250 | | | | 334 | |
| Total Home Equity | | | 2,162 | | | | 1,218 | | | | 1,051 | | | | 2,804 | | | | 321 | | | | 2,259 | | | | 98,258 | | | | 108,073 | |
| Current-period gross charge-offs | | | - | | | | 1 | | | | - | | | | - | | | | - | | | | 26 | | | | - | | | | 27 | |
| CONSUMER | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | | 9,069 | | | | 5,536 | | | | 3,899 | | | | 2,312 | | | | 654 | | | | 670 | | | | 1,973 | | | | 24,113 | |
| Special Mention | | | - | | | | - | | | | 6 | | | | - | | | | - | | | | - | | | | - | | | | 6 | |
| Substandard | | | 113 | | | | 59 | | | | 92 | | | | 10 | | | | - | | | | 16 | | | | 15 | | | | 305 | |
| Total Consumer | | | 9,182 | | | | 5,595 | | | | 3,997 | | | | 2,322 | | | | 654 | | | | 686 | | | | 1,988 | | | | 24,424 | |
| Current-period gross charge-offs | | | - | | | | 17 | | | | 47 | | | | 14 | | | | - | | | | 83 | | | | 14 | | | | 175 | |
| COMMERCIAL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | | 27,402 | | | | 26,864 | | | | 19,468 | | | | 13,647 | | | | 10,284 | | | | 15,376 | | | | 34,160 | | | | 147,201 | |
| Special Mention | | | - | | | | - | | | | 311 | | | | 164 | | | | - | | | | - | | | | 347 | | | | 822 | |
| Substandard | | | 92 | | | | 1,111 | | | | 41 | | | | - | | | | 18 | | | | 142 | | | | 4 | | | | 1,408 | |
| Total Commercial | | | 27,494 | | | | 27,975 | | | | 19,820 | | | | 13,811 | | | | 10,302 | | | | 15,518 | | | | 34,511 | | | | 149,431 | |
| Current-period gross charge-offs | | | - | | | | - | | | | - | | | | 6 | | | | - | | | | - | | | | - | | | | 6 | |
| AGRICULTURAL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | | 42,889 | | | | 15,230 | | | | 7,802 | | | | 5,210 | | | | 2,415 | | | | 2,501 | | | | 52,014 | | | | 128,061 | |
| Special Mention | | | 442 | | | | 1,112 | | | | 1,590 | | | | 2 | | | | 17 | | | | 626 | | | | 543 | | | | 4,332 | |
| Substandard | | | - | | | | 1,035 | | | | 824 | | | | - | | | | - | | | | 207 | | | | - | | | | 2,066 | |
| Total Agricultural | | | 43,331 | | | | 17,377 | | | | 10,216 | | | | 5,212 | | | | 2,432 | | | | 3,334 | | | | 52,557 | | | | 134,459 | |
| Current-period gross charge-offs | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | |
| TOTAL LOANS | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | | 236,822 | | | | 166,249 | | | | 145,740 | | | | 281,836 | | | | 168,640 | | | | 260,086 | | | | 234,595 | | | | 1,493,968 | |
| Special Mention | | | 442 | | | | 1,461 | | | | 2,734 | | | | 1,143 | | | | 79 | | | | 2,631 | | | | 4,227 | | | | 12,717 | |
| Substandard | | | 205 | | | | 2,393 | | | | 1,557 | | | | 1,847 | | | | 482 | | | | 5,525 | | | | 325 | | | | 12,334 | |
| Total | | $ | 237,469 | | | $ | 170,103 | | | $ | 150,031 | | | $ | 284,826 | | | $ | 169,201 | | | $ | 268,242 | | | $ | 239,147 | | | $ | 1,519,019 | |
|