| Financing Receivable, Past Due [Table Text Block] |
| | | 30-59 | | | 60-89 | | | Greater | | | | | | | | | | | | | |
| | | Days Past | | | Days Past | | | than 90 | | | Total | | | | | | | Total | |
| March 31, 2026 | | Due | | | Due | | | Days | | | Past Due | | | Current | | | Loans | |
| | | (Dollars in Thousands) | |
| Commercial and Industrial | | $ | — | | | $ | — | | | $ | 680 | | | $ | 680 | | | $ | 39,137 | | | $ | 39,817 | |
| Construction | | | — | | | | — | | | | 1,091 | | | | 1,091 | | | | 216,714 | | | | 217,805 | |
| Real Estate Mortgage: | | | | | | | | | | | | | | | | | | | | | | | | |
| Commercial – Owner Occupied | | | — | | | | — | | | | 400 | | | | 400 | | | | 184,291 | | | | 184,691 | |
| Commercial – Non-owner Occupied | | | — | | | | — | | | | 3,163 | | | | 3,163 | | | | 473,820 | | | | 476,983 | |
| Residential – 1 to 4 Family | | | 1,989 | | | | 242 | | | | 2,494 | | | | 4,725 | | | | 425,739 | | | | 430,464 | |
| Residential – 1 to 4 Family Investment | | | 1,507 | | | | 118 | | | | 1,437 | | | | 3,062 | | | | 476,036 | | | | 479,098 | |
| Residential – Multifamily | | | — | | | | — | | | | — | | | | — | | | | 210,577 | | | | 210,577 | |
| Consumer | | | 24 | | | | — | | | | 141 | | | | 165 | | | | 3,696 | | | | 3,861 | |
| Total Loans | | $ | 3,520 | | | $ | 360 | | | $ | 9,406 | | | $ | 13,286 | | | $ | 2,030,010 | | | $ | 2,043,296 | |
| | | 30-59 | | | 60-89 | | | Greater | | | | | | | | | | | | | |
| | | Days Past | | | Days Past | | | than 90 | | | Total | | | | | | | Total | |
| December 31, 2025 | | Due | | | Due | | | Days | | | Past Due | | | Current | | | Loans | |
| | | (Dollars in thousands) | |
| Commercial and Industrial | | $ | — | | | $ | — | | | $ | 688 | | | $ | 688 | | | $ | 37,984 | | | $ | 38,672 | |
| Construction | | | — | | | | — | | | | 1,091 | | | | 1,091 | | | | 211,216 | | | | 212,307 | |
| Real Estate Mortgage: | | | | | | | | | | | | | | | | | | | | | | | | |
| Commercial – Owner Occupied | | | — | | | | — | | | | 400 | | | | 400 | | | | 182,129 | | | | 182,529 | |
| Commercial – Non-owner Occupied | | | — | | | | 1,122 | | | | 3,668 | | | | 4,790 | | | | 473,505 | | | | 478,295 | |
| Residential – 1 to 4 Family | | | — | | | | 1,434 | | | | 2,965 | | | | 4,399 | | | | 447,064 | | | | 451,463 | |
| Residential – 1 to 4 Family Investment | | | — | | | | 896 | | | | 1,840 | | | | 2,736 | | | | 491,492 | | | | 494,228 | |
| Residential – Multifamily | | | — | | | | — | | | | — | | | | — | | | | 173,611 | | | | 173,611 | |
| Consumer | | | — | | | | 32 | | | | 141 | | | | 173 | | | | 3,949 | | | | 4,122 | |
| Total Loans | | $ | — | | | $ | 3,484 | | | $ | 10,793 | | | $ | 14,277 | | | $ | 2,020,950 | | | $ | 2,035,227 | |
|
| Financing Receivable Credit Quality Indicators [Table Text Block] |
| | | | | | | | | | | | | | | | | | | | | | | | | | | Revolving | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | Loans at | | | | | |
| (Dollars in thousands) | | Term Loans Amortized Cost Basis by Origination Year | | | Amortized | | | | | |
| As of March 31, 2026 | | 2026 | | | 2025 | | | 2024 | | | 2023 | | | 2022 | | | Prior | | | Cost Basis | | | Total | |
| Commercial and Industrial | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | $ | 226 | | | $ | 4,929 | | | $ | 751 | | | $ | 3,109 | | | $ | 299 | | | $ | 5,242 | | | $ | 24,581 | | | $ | 39,137 | |
| OAEM | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | |
| Substandard | | | — | | | | — | | | | — | | | | — | | | | 403 | | | | — | | | | 277 | | | | 680 | |
| Doubtful | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | |
| | | $ | 226 | | | $ | 4,929 | | | $ | 751 | | | $ | 3,109 | | | $ | 702 | | | $ | 5,242 | | | $ | 24,858 | | | $ | 39,817 | |
| Current period gross charge-offs | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Construction | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | $ | — | | | $ | 1,002 | | | $ | 324 | | | $ | 305 | | | $ | 988 | | | $ | 194 | | | $ | 213,901 | | | $ | 216,714 | |
| OAEM | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | |
| Substandard | | | — | | | | — | | | | — | | | | — | | | | — | | | | 1,091 | | | | — | | | | 1,091 | |
| Doubtful | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | |
| | | $ | — | | | $ | 1,002 | | | $ | 324 | | | $ | 305 | | | $ | 988 | | | $ | 1,285 | | | $ | 213,901 | | | $ | 217,805 | |
| Current period gross charge-offs | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Commercial – Owner Occupied | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | $ | 6,655 | | | $ | 33,535 | | | $ | 23,157 | | | $ | 29,220 | | | $ | 33,828 | | | $ | 55,657 | | | $ | 2,239 | | | $ | 184,291 | |
| OAEM | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | |
| Substandard | | | — | | | | — | | | | — | | | | — | | | | — | | | | 400 | | | | — | | | | 400 | |
| Doubtful | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | |
| | | $ | 6,655 | | | $ | 33,535 | | | $ | 23,157 | | | $ | 29,220 | | | $ | 33,828 | | | $ | 56,057 | | | $ | 2,239 | | | $ | 184,691 | |
| Current period gross charge-offs | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Commercial – Non-owner Occupied | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | $ | 6,889 | | | $ | 108,733 | | | $ | 50,344 | | | $ | 13,113 | | | $ | 102,107 | | | $ | 174,973 | | | $ | 4,302 | | | $ | 460,461 | |
| OAEM | | | — | | | | — | | | | — | | | | — | | | | — | | | | 2,159 | | | | — | | | | 2,159 | |
| Substandard | | | — | | | | — | | | | — | | | | — | | | | 361 | | | | 14,002 | | | | — | | | | 14,363 | |
| Doubtful | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | |
| | | $ | 6,889 | | | $ | 108,733 | | | $ | 50,344 | | | $ | 13,113 | | | $ | 102,468 | | | $ | 191,134 | | | $ | 4,302 | | | $ | 476,983 | |
| Current period gross charge-offs | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Residential – 1 to 4 Family | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Performing | | $ | 10,225 | | | $ | 41,700 | | | $ | 42,313 | | | $ | 45,814 | | | $ | 93,114 | | | $ | 189,267 | | | $ | 5,537 | | | $ | 427,970 | |
| Nonperforming | | | — | | | | — | | | | — | | | | 786 | | | | 731 | | | | 977 | | | | — | | | | 2,494 | |
| | | $ | 10,225 | | | $ | 41,700 | | | $ | 42,313 | | | $ | 46,600 | | | $ | 93,845 | | | $ | 190,244 | | | $ | 5,537 | | | $ | 430,464 | |
| Current period gross charge-offs | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Residential – 1 to 4 Family Investment | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Performing | | $ | 4,422 | | | $ | 37,623 | | | $ | 51,216 | | | $ | 67,270 | | | $ | 110,450 | | | $ | 206,680 | | | $ | — | | | $ | 477,661 | |
| Nonperforming | | | — | | | | — | | | | — | | | | 1,108 | | | | — | | | | 329 | | | | — | | | | 1,437 | |
| | | $ | 4,422 | | | $ | 37,623 | | | $ | 51,216 | | | $ | 68,378 | | | $ | 110,450 | | | $ | 207,009 | | | $ | — | | | $ | 479,098 | |
| Current period gross charge-offs | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Residential – Multifamily | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | $ | 14,804 | | | $ | 42,698 | | | $ | 13,913 | | | $ | 4,786 | | | $ | 71,389 | | | $ | 62,987 | | | $ | — | | | $ | 210,577 | |
| OAEM | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | |
| Substandard | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | |
| Doubtful | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | |
| | | $ | 14,804 | | | $ | 42,698 | | | $ | 13,913 | | | $ | 4,786 | | | $ | 71,389 | | | $ | 62,987 | | | $ | — | | | $ | 210,577 | |
| Current period gross charge-offs | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Consumer | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Performing | | $ | — | | | $ | — | | | $ | 221 | | | $ | — | | | $ | — | | | $ | 3,490 | | | $ | 9 | | | $ | 3,720 | |
| Nonperforming | | | — | | | | — | | | | — | | | | — | | | | — | | | | 141 | | | | — | | | | 141 | |
| | | $ | — | | | $ | — | | | $ | 221 | | | $ | — | | | $ | — | | | $ | 3,631 | | | $ | 9 | | | $ | 3,861 | |
| Current period gross charge-offs | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Total Loan Receivable | | $ | 43,221 | | | $ | 270,220 | | | $ | 182,239 | | | $ | 165,511 | | | $ | 413,670 | | | $ | 717,589 | | | $ | 250,846 | | | $ | 2,043,296 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | Revolving | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | Loans at | | | | | |
| (Dollars in thousands) | | Term Loans Amortized Cost Basis by Origination Year | | | Amortized | | | | | |
| As of December 31, 2025 | | 2025 | | | 2024 | | | 2023 | | | 2022 | | | 2021 | | | Prior | | | Cost Basis | | | Total | |
| Commercial and Industrial | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | $ | 4,990 | | | $ | 879 | | | $ | 3,313 | | | $ | 305 | | | $ | 2 | | | $ | 5,778 | | | $ | 22,717 | | | $ | 37,984 | |
| OAEM | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | |
| Substandard | | | — | | | | — | | | | — | | | | 411 | | | | — | | | | — | | | | 277 | | | | 688 | |
| Doubtful | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | |
| | | $ | 4,990 | | | $ | 879 | | | $ | 3,313 | | | $ | 716 | | | $ | 2 | | | $ | 5,778 | | | $ | 22,994 | | | $ | 38,672 | |
| Current period gross charge-offs | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Construction | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | $ | 1,001 | | | $ | 325 | | | $ | 307 | | | $ | 1,396 | | | $ | — | | | $ | 193 | | | $ | 207,994 | | | $ | 211,216 | |
| OAEM | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | |
| Substandard | | | — | | | | — | | | | — | | | | — | | | | — | | | | 1,091 | | | | — | | | | 1,091 | |
| Doubtful | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | |
| | | $ | 1,001 | | | $ | 325 | | | $ | 307 | | | $ | 1,396 | | | $ | — | | | $ | 1,284 | | | $ | 207,994 | | | $ | 212,307 | |
| Current period gross charge-offs | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Commercial – Owner Occupied | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | $ | 32,560 | | | $ | 23,259 | | | $ | 32,471 | | | $ | 34,016 | | | $ | 11,545 | | | $ | 46,025 | | | $ | 2,253 | | | $ | 182,129 | |
| OAEM | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | |
| Substandard | | | — | | | | — | | | | — | | | | — | | | | — | | | | 400 | | | | — | | | | 400 | |
| Doubtful | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | |
| | | $ | 32,560 | | | $ | 23,259 | | | $ | 32,471 | | | $ | 34,016 | | | $ | 11,545 | | | $ | 46,425 | | | $ | 2,253 | | | $ | 182,529 | |
| Current period gross charge-offs | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Commercial – Non-owner Occupied | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | $ | 109,092 | | | $ | 50,669 | | | $ | 14,659 | | | $ | 102,688 | | | $ | 29,279 | | | $ | 150,007 | | | $ | 4,794 | | | $ | 461,188 | |
| OAEM | | | — | | | | — | | | | — | | | | — | | | | — | | | | 2,176 | | | | — | | | | 2,176 | |
| Substandard | | | — | | | | — | | | | — | | | | 370 | | | | — | | | | 14,561 | | | | — | | | | 14,931 | |
| Doubtful | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | |
| | | $ | 109,092 | | | $ | 50,669 | | | $ | 14,659 | | | $ | 103,058 | | | $ | 29,279 | | | $ | 166,744 | | | $ | 4,794 | | | $ | 478,295 | |
| Current period gross charge-offs | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | 202 | | | $ | — | | | $ | 202 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Residential – 1 to 4 Family | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Performing | | $ | 59,089 | | | $ | 43,287 | | | $ | 47,018 | | | $ | 95,574 | | | $ | 49,503 | | | $ | 148,408 | | | $ | 5,619 | | | $ | 448,498 | |
| Nonperforming | | | — | | | | — | | | | 841 | | | | 733 | | | | — | | | | 1,391 | | | | — | | | | 2,965 | |
| | | $ | 59,089 | | | $ | 43,287 | | | $ | 47,859 | | | $ | 96,307 | | | $ | 49,503 | | | $ | 149,799 | | | $ | 5,619 | | | $ | 451,463 | |
| Current period gross charge-offs | | $ | — | | | $ | — | | | $ | 47 | | | $ | — | | | $ | — | | | $ | 203 | | | $ | — | | | $ | 250 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Residential – 1 to 4 Family Investment | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Performing | | $ | 39,340 | | | $ | 52,575 | | | $ | 70,258 | | | $ | 114,208 | | | $ | 90,734 | | | $ | 125,273 | | | $ | — | | | $ | 492,388 | |
| Nonperforming | | | — | | | | — | | | | 985 | | | | 525 | | | | — | | | | 330 | | | | — | | | | 1,840 | |
| | | $ | 39,340 | | | $ | 52,575 | | | $ | 71,243 | | | $ | 114,733 | | | $ | 90,734 | | | $ | 125,603 | | | $ | — | | | $ | 494,228 | |
| Current period gross charge-offs | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Residential – Multifamily | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Pass | | $ | 27,456 | | | $ | 13,952 | | | $ | 4,812 | | | $ | 63,789 | | | $ | 31,067 | | | $ | 32,535 | | | $ | — | | | $ | 173,611 | |
| OAEM | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | |
| Substandard | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | |
| Doubtful | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | | | | — | |
| | | $ | 27,456 | | | $ | 13,952 | | | $ | 4,812 | | | $ | 63,789 | | | $ | 31,067 | | | $ | 32,535 | | | $ | — | | | $ | 173,611 | |
| Current period gross charge-offs | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Consumer | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Performing | | $ | — | | | $ | 226 | | | $ | — | | | $ | — | | | $ | — | | | $ | 3,746 | | | $ | 9 | | | $ | 3,981 | |
| Nonperforming | | | — | | | | — | | | | — | | | | — | | | | — | | | | 141 | | | | — | | | | 141 | |
| | | $ | — | | | $ | 226 | | | $ | — | | | $ | — | | | $ | — | | | $ | 3,887 | | | $ | 9 | | | $ | 4,122 | |
| Current period gross charge-offs | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | — | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Total Loan Receivable | | $ | 273,528 | | | $ | 185,172 | | | $ | 174,664 | | | $ | 414,015 | | | $ | 212,130 | | | $ | 532,055 | | | $ | 243,663 | | | $ | 2,035,227 | |
|