| Financing Receivable Credit Quality Indicators [Table Text Block] |
| | | September 30, 2026 | |
| | | 2026 | | | 2025 | | | 2024 | | | 2023 | | | 2022 | | | Prior | | | Revolving Loans | | | Total Loans | |
| | | (In Thousands) | |
| RESIDENTIAL 1-4 FAMILY | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | $ | 22,729 | | | $ | 14,094 | | | $ | 12,213 | | | $ | 18,581 | | | $ | 22,407 | | | $ | 49,158 | | | $ | 30 | | | $ | 139,212 | |
| Special Mention | | | - | | | | - | | | | - | | | | - | | | | - | | | | 114 | | | | - | | | | 114 | |
| Substandard | | | - | | | | - | | | | - | | | | - | | | | 1,035 | | | | 664 | | | | - | | | | 1,699 | |
| Total Residential 1-4 family | | | 22,729 | | | | 14,094 | | | | 12,213 | | | | 18,581 | | | | 23,442 | | | | 49,936 | | | | 30 | | | | 141,025 | |
| Current-period gross charge-offs | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | |
| RESIDENTIAL 1-4 FAMILY CONSTRUCTION | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | | 29,966 | | | | 11,480 | | | | - | | | | - | | | | 10,129 | | | | - | | | | 6,277 | | | | 57,852 | |
| Special Mention | | | - | | | | - | | | | 349 | | | | - | | | | - | | | | - | | | | - | | | | 349 | |
| Total Residential 1-4 family construction | | | 29,966 | | | | 11,480 | | | | 349 | | | | - | | | | 10,129 | | | | - | | | | 6,277 | | | | 58,201 | |
| Current-period gross charge-offs | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | |
| COMMERCIAL REAL ESTATE | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | | 160,642 | | | | 50,819 | | | | 65,906 | | | | 58,454 | | | | 167,292 | | | | 223,668 | | | | 46,705 | | | | 773,486 | |
| Special Mention | | | - | | | | 92 | | | | - | | | | 780 | | | | 372 | | | | 2,086 | | | | 2,914 | | | | 6,244 | |
| Substandard | | | - | | | | - | | | | - | | | | 474 | | | | - | | | | 4,502 | | | | - | | | | 4,976 | |
| Total Commercial real estate | | | 160,642 | | | | 50,911 | | | | 65,906 | | | | 59,708 | | | | 167,664 | | | | 230,256 | | | | 49,619 | | | | 784,706 | |
| Current-period gross charge-offs | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | |
| COMMERCIAL CONSTRUCTION AND DEVELOPMENT | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | | 11,765 | | | | 37,841 | | | | 11,105 | | | | 7,014 | | | | 11,557 | | | | 16,835 | | | | 6,062 | | | | 102,179 | |
| Special Mention | | | - | | | | 736 | | | | - | | | | 746 | | | | - | | | | - | | | | - | | | | 1,482 | |
| Substandard | | | - | | | | - | | | | - | | | | - | | | | - | | | | 897 | | | | - | | | | 897 | |
| Total Commercial construction and development | | | 11,765 | | | | 38,577 | | | | 11,105 | | | | 7,760 | | | | 11,557 | | | | 17,732 | | | | 6,062 | | | | 104,558 | |
| Current-period gross charge-offs | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | |
| FARMLAND | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | | 24,332 | | | | 26,555 | | | | 18,669 | | | | 13,614 | | | | 25,120 | | | | 53,880 | | | | 1,275 | | | | 163,445 | |
| Special Mention | | | 1,875 | | | | - | | | | - | | | | 1,082 | | | | - | | | | 420 | | | | - | | | | 3,377 | |
| Substandard | | | - | | | | 798 | | | | 200 | | | | - | | | | 1,119 | | | | 2,653 | | | | 618 | | | | 5,388 | |
| Total Farmland | | | 26,207 | | | | 27,353 | | | | 18,869 | | | | 14,696 | | | | 26,239 | | | | 56,953 | | | | 1,893 | | | | 172,210 | |
| Current-period gross charge-offs | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | |
| HOME EQUITY | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | | 7,346 | | | | 1,776 | | | | 1,141 | | | | 849 | | | | 567 | | | | 1,683 | | | | 102,261 | | | | 115,623 | |
| Special Mention | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | 93 | | | | 93 | |
| Substandard | | | - | | | | - | | | | - | | | | - | | | | - | | | | 20 | | | | 201 | | | | 221 | |
| Total Home Equity | | | 7,346 | | | | 1,776 | | | | 1,141 | | | | 849 | | | | 567 | | | | 1,703 | | | | 102,555 | | | | 115,937 | |
| Current-period gross charge-offs | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | |
| CONSUMER | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | | 6,074 | | | | 5,060 | | | | 3,484 | | | | 2,278 | | | | 1,326 | | | | 681 | | | | 2,049 | | | | 20,952 | |
| Special Mention | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | 19 | | | | 19 | |
| Substandard | | | - | | | | 64 | | | | 6 | | | | 46 | | | | - | | | | - | | | | 9 | | | | 125 | |
| Total Consumer | | | 6,074 | | | | 5,124 | | | | 3,490 | | | | 2,324 | | | | 1,326 | | | | 681 | | | | 2,077 | | | | 21,096 | |
| Current-period gross charge-offs | | | - | | | | 76 | | | | 52 | | | | 34 | | | | 10 | | | | - | | | | 3 | | | | 175 | |
| COMMERCIAL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | | 46,742 | | | | 25,826 | | | | 20,909 | | | | 15,760 | | | | 6,896 | | | | 18,674 | | | | 37,610 | | | | 172,417 | |
| Special Mention | | | 176 | | | | - | | | | - | | | | 278 | | | | 131 | | | | - | | | | 213 | | | | 798 | |
| Substandard | | | - | | | | 67 | | | | 1,133 | | | | 273 | | | | - | | | | 106 | | | | 125 | | | | 1,704 | |
| Doubtful | | | - | | | | 82 | | | | - | | | | - | | | | - | | | | - | | | | - | | | | 82 | |
| Total Commercial | | | 46,918 | | | | 25,975 | | | | 22,042 | | | | 16,311 | | | | 7,027 | | | | 18,780 | | | | 37,948 | | | | 175,001 | |
| Current-period gross charge-offs | | | - | | | | - | | | | 63 | | | | 40 | | | | - | | | | 14 | | | | - | | | | 117 | |
| AGRICULTURAL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | | 25,622 | | | | 17,529 | | | | 7,954 | | | | 4,243 | | | | 2,988 | | | | 1,675 | | | | 77,413 | | | | 137,424 | |
| Special Mention | | | 2,734 | | | | 261 | | | | 406 | | | | - | | | | - | | | | - | | | | 493 | | | | 3,894 | |
| Substandard | | | 475 | | | | 759 | | | | - | | | | 1,248 | | | | - | | | | 844 | | | | - | | | | 3,326 | |
| Total Agricultural | | | 28,831 | | | | 18,549 | | | | 8,360 | | | | 5,491 | | | | 2,988 | | | | 2,519 | | | | 77,906 | | | | 144,644 | |
| Current-period gross charge-offs | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | | | | - | |
| TOTAL LOANS | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | | 335,218 | | | | 190,980 | | | | 141,381 | | | | 120,793 | | | | 248,282 | | | | 366,254 | | | | 279,682 | | | | 1,682,590 | |
| Special Mention | | | 4,785 | | | | 1,089 | | | | 755 | | | | 2,886 | | | | 503 | | | | 2,620 | | | | 3,732 | | | | 16,370 | |
| Substandard | | | 475 | | | | 1,688 | | | | 1,339 | | | | 2,041 | | | | 2,154 | | | | 9,686 | | | | 953 | | | | 18,336 | |
| Doubtful | | | - | | | | 82 | | | | - | | | | - | | | | - | | | | - | | | | - | | | | 82 | |
| Total | | $ | 340,478 | | | $ | 193,839 | | | $ | 143,475 | | | $ | 125,720 | | | $ | 250,939 | | | $ | 378,560 | | | $ | 284,367 | | | $ | 1,717,378 | |
| | | 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 | |
|