| Financing Receivable, Past Due [Table Text Block] |
| | | June 30, 2026 | |
| | | 30-59 Days Past Due | | | 60-89 Days Past Due | | | > 90 Days Past Due | | | Total Past Due | | | Current | | | Total Loans | | | Non-accrual Loans | | | 90 Days or More Past Due and Accruing | |
| Real estate loans: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Construction and land development | | $ | — | | | $ | — | | | $ | 18 | | | $ | 18 | | | $ | 113,271 | | | $ | 113,289 | | | $ | 41 | | | $ | — | |
| Secured by 1-4 family residential | | | 1,020 | | | | 915 | | | | 1,047 | | | | 2,982 | | | | 519,781 | | | | 522,763 | | | | 2,367 | | | | — | |
| Other real estate loans | | | 166 | | | | 146 | | | | — | | | | 312 | | | | 719,808 | | | | 720,120 | | | | — | | | | — | |
| Commercial and industrial | | | 313 | | | | 301 | | | | 1,660 | | | | 2,274 | | | | 111,068 | | | | 113,342 | | | | 2,329 | | | | — | |
| Consumer and other loans | | | 42 | | | | 1 | | | | — | | | | 43 | | | | 17,841 | | | | 17,884 | | | | — | | | | — | |
| Total | | $ | 1,541 | | | $ | 1,363 | | | $ | 2,725 | | | $ | 5,629 | | | $ | 1,481,769 | | | $ | 1,487,398 | | | $ | 4,737 | | | $ | — | |
| | | December 31, 2025 | |
| | | 30-59 Days Past Due | | | 60-89 Days Past Due | | | > 90 Days Past Due | | | Total Past Due | | | Current | | | Total Loans | | | Non-accrual Loans | | | 90 Days or More Past Due and Accruing | |
| Real estate loans: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Construction and land development | | $ | 30 | | | $ | — | | | $ | 45 | | | $ | 75 | | | $ | 88,349 | | | $ | 88,424 | | | $ | 45 | | | $ | — | |
| Secured by 1-4 family residential | | | 2,034 | | | | 857 | | | | 939 | | | | 3,830 | | | | 523,453 | | | | 527,283 | | | | 1,994 | | | | — | |
| Other real estate loans | | | — | | | | — | | | | — | | | | — | | | | 696,978 | | | | 696,978 | | | | — | | | | — | |
| Commercial and industrial | | | 646 | | | | 520 | | | | 1,324 | | | | 2,490 | | | | 115,454 | | | | 117,944 | | | | 2,615 | | | | — | |
| Consumer and other loans | | | 12 | | | | 23 | | | | — | | | | 35 | | | | 19,081 | | | | 19,116 | | | | — | | | | — | |
| Total | | $ | 2,722 | | | $ | 1,400 | | | $ | 2,308 | | | $ | 6,430 | | | $ | 1,443,315 | | | $ | 1,449,745 | | | $ | 4,654 | | | $ | — | |
|
| Financing Receivable Credit Quality Indicators [Table Text Block] |
| | | June 30, 2026 | | | | | | | | | |
| | | Term Loans by Year of Origination | | | | | | | | | |
| | | 2026 | | | 2025 | | | 2024 | | | 2023 | | | 2022 | | | Prior | | | Revolving | | | Total | |
| Construction and land development | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | $ | 13,792 | | | $ | 6,990 | | | $ | 560 | | | $ | 3,598 | | | $ | 1,762 | | | $ | 6,964 | | | $ | 79,582 | | | $ | 113,248 | |
| Special Mention | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | |
| Substandard | | | — | | | | — | | | | — | | | | — | | | | — | | | | 41 | | | | — | | | | 41 | |
| Doubtful | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | |
| Total construction and land development | | $ | 13,792 | | | $ | 6,990 | | | $ | 560 | | | $ | 3,598 | | | $ | 1,762 | | | $ | 7,005 | | | $ | 79,582 | | | $ | 113,289 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Current period gross write-offs | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Secured by 1-4 family residential | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | $ | 21,532 | | | $ | 30,823 | | | $ | 25,869 | | | $ | 58,007 | | | $ | 95,461 | | | $ | 210,252 | | | $ | 78,390 | | | $ | 520,334 | |
| Special Mention | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | |
| Substandard | | | — | | | | — | | | | 494 | | | | 318 | | | | 331 | | | | 1,286 | | | | — | | | | 2,429 | |
| Doubtful | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | |
| Total secured by 1-4 family residential | | $ | 21,532 | | | $ | 30,823 | | | $ | 26,363 | | | $ | 58,325 | | | $ | 95,792 | | | $ | 211,538 | | | $ | 78,390 | | | $ | 522,763 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Current period gross write-offs | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | 29 | | | $ | — | | | $ | 29 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Other real estate loans | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | $ | 71,835 | | | $ | 69,913 | | | $ | 53,780 | | | $ | 90,333 | | | $ | 124,039 | | | $ | 275,181 | | | $ | 32,737 | | | $ | 717,818 | |
| Special Mention | | | — | | | | 310 | | | | — | | | | — | | | | — | | | | 1,992 | | | | — | | | | 2,302 | |
| Substandard | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | |
| Doubtful | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | |
| Total other real estate loans | | $ | 71,835 | | | $ | 70,223 | | | $ | 53,780 | | | $ | 90,333 | | | $ | 124,039 | | | $ | 277,173 | | | $ | 32,737 | | | $ | 720,120 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Current period gross write-offs | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Commercial and industrial | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | $ | 8,000 | | | $ | 10,836 | | | $ | 13,616 | | | $ | 11,687 | | | $ | 13,054 | | | $ | 20,238 | | | $ | 33,037 | | | $ | 110,468 | |
| Special Mention | | | — | | | | 384 | | | | — | | | | — | | | | — | | | | — | | | | — | | | | 384 | |
| Substandard | | | — | | | | — | | | | 639 | | | | 1,052 | | | | 270 | | | | — | | | | — | | | | 1,961 | |
| Doubtful | | | — | | | | — | | | | — | | | | — | | | | — | | | | 529 | | | | — | | | | 529 | |
| Total commercial and industrial | | $ | 8,000 | | | $ | 11,220 | | | $ | 14,255 | | | $ | 12,739 | | | $ | 13,324 | | | $ | 20,767 | | | $ | 33,037 | | | $ | 113,342 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Current period gross write-offs | | $ | — | | | $ | — | | | $ | — | | | $ | 263 | | | $ | 302 | | | $ | 131 | | | $ | — | | | $ | 696 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Consumer and other loans | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | $ | 2,643 | | | $ | 3,404 | | | $ | 1,461 | | | $ | 1,954 | | | $ | 3,809 | | | $ | 2,153 | | | $ | 2,459 | | | $ | 17,883 | |
| Special Mention | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | |
| Substandard | | | — | | | | — | | | | — | | | | — | | | | — | | | | 1 | | | | — | | | | 1 | |
| Doubtful | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | |
| Total consumer and other loans | | $ | 2,643 | | | $ | 3,404 | | | $ | 1,461 | | | $ | 1,954 | | | $ | 3,809 | | | $ | 2,154 | | | $ | 2,459 | | | $ | 17,884 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Current period gross write-offs | | $ | 191 | | | $ | 44 | | | $ | 1 | | | $ | 14 | | | $ | — | | | $ | — | | | $ | — | | | $ | 250 | |
| | | December 31, 2025 | | | | | | | | | |
| | | Term Loans by Year of Origination | | | | | | | | | |
| | | 2025 | | | 2024 | | | 2023 | | | 2022 | | | 2021 | | | Prior | | | Revolving | | | Total | |
| Construction and land development | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | $ | 7,661 | | | $ | 674 | | | $ | 3,505 | | | $ | 1,999 | | | $ | 3,578 | | | $ | 4,079 | | | $ | 66,883 | | | $ | 88,379 | |
| Special Mention | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | |
| Substandard | | | — | | | | — | | | | — | | | | — | | | | — | | | | 45 | | | | — | | | | 45 | |
| Doubtful | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | |
| Total construction and land development | | $ | 7,661 | | | $ | 674 | | | $ | 3,505 | | | $ | 1,999 | | | $ | 3,578 | | | $ | 4,124 | | | $ | 66,883 | | | $ | 88,424 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Current period gross write-offs | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | 22 | | | $ | — | | | $ | 22 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Secured by 1-4 family residential | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | $ | 37,248 | | | $ | 29,544 | | | $ | 61,183 | | | $ | 100,324 | | | $ | 91,044 | | | $ | 135,178 | | | $ | 70,577 | | | $ | 525,098 | |
| Special Mention | | | — | | | | 119 | | | | — | | | | — | | | | — | | | | — | | | | — | | | | 119 | |
| Substandard | | | — | | | | — | | | | 29 | | | | 210 | | | | 343 | | | | 1,484 | | | | — | | | | 2,066 | |
| Doubtful | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | |
| Total secured by 1-4 family residential | | $ | 37,248 | | | $ | 29,663 | | | $ | 61,212 | | | $ | 100,534 | | | $ | 91,387 | | | $ | 136,662 | | | $ | 70,577 | | | $ | 527,283 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Current period gross write-offs | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | 59 | | | $ | — | | | $ | 59 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Other real estate loans | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | $ | 67,088 | | | $ | 59,352 | | | $ | 95,653 | | | $ | 130,268 | | | $ | 105,813 | | | $ | 201,768 | | | $ | 32,327 | | | $ | 692,269 | |
| Special Mention | | | — | | | | 313 | | | | — | | | | — | | | | — | | | | 4,146 | | | | — | | | | 4,459 | |
| Substandard | | | — | | | | — | | | | — | | | | — | | | | — | | | | 250 | | | | — | | | | 250 | |
| Doubtful | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | |
| Total other real estate loans | | $ | 67,088 | | | $ | 59,665 | | | $ | 95,653 | | | $ | 130,268 | | | $ | 105,813 | | | $ | 206,164 | | | $ | 32,327 | | | $ | 696,978 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Current period gross write-offs | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | 7 | | | $ | — | | | $ | 7 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Commercial and industrial | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | $ | 11,592 | | | $ | 16,531 | | | $ | 13,637 | | | $ | 14,373 | | | $ | 13,054 | | | $ | 11,088 | | | $ | 33,469 | | | $ | 113,744 | |
| Special Mention | | | — | | | | 400 | | | | — | | | | 1,072 | | | | — | | | | — | | | | — | | | | 1,472 | |
| Substandard | | | — | | | | — | | | | 751 | | | | 1,062 | | | | 386 | | | | — | | | | — | | | | 2,199 | |
| Doubtful | | | — | | | | — | | | | — | | | | — | | | | — | | | | 529 | | | | — | | | | 529 | |
| Total commercial and industrial | | $ | 11,592 | | | $ | 16,931 | | | $ | 14,388 | | | $ | 16,507 | | | $ | 13,440 | | | $ | 11,617 | | | $ | 33,469 | | | $ | 117,944 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Current period gross write-offs | | $ | — | | | $ | 671 | | | $ | 701 | | | $ | 1,930 | | | $ | 481 | | | $ | 438 | | | $ | — | | | $ | 4,221 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Consumer and other loans | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | $ | 4,974 | | | $ | 2,155 | | | $ | 2,405 | | | $ | 4,252 | | | $ | 91 | | | $ | 2,671 | | | $ | 2,568 | | | $ | 19,116 | |
| Special Mention | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | |
| Substandard | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | |
| Doubtful | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | |
| Total consumer and other loans | | $ | 4,974 | | | $ | 2,155 | | | $ | 2,405 | | | $ | 4,252 | | | $ | 91 | | | $ | 2,671 | | | $ | 2,568 | | | $ | 19,116 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Current period gross write-offs | | $ | 469 | | | $ | 10 | | | $ | 12 | | | $ | — | | | $ | — | | | $ | 5 | | | $ | — | | | $ | 496 | |
|