| Financing Receivable by Origination Year [Table Text Block] |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Revolving | | | Grand | |
| (Dollars in thousands) | | 2026 | | | 2025 | | | 2024 | | | 2023 | | | 2022 | | | Prior | | | Term Total | | | Loans | | | Total | |
| Commercial: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Commercial and Industrial: | | | | | | | | | | | | | | | | | | | | | |
| Grades 1 – 4 | | $ | 75,469 | | | $ | 61,636 | | | $ | 34,844 | | | $ | 24,063 | | | $ | 3,963 | | | $ | 37,092 | | | $ | 237,067 | | | $ | 488,592 | | | $ | 725,659 | |
| Grades 5 – 7 | | | 122,134 | | | | 61,288 | | | | 80,367 | | | | 13,704 | | | | 10,111 | | | | 4,999 | | | | 292,603 | | | | 463,230 | | | | 755,833 | |
| Grades 8 – 9 | | | 5,913 | | | | 1,101 | | | | 0 | | | | 822 | | | | 0 | | | | 117 | | | | 7,953 | | | | 9,641 | | | | 17,594 | |
| Total | | $ | 203,516 | | | $ | 124,025 | | | $ | 115,211 | | | $ | 38,589 | | | $ | 14,074 | | | $ | 42,208 | | | $ | 537,623 | | | $ | 961,463 | | | $ | 1,499,086 | |
| Year-to-date gross write offs | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 8 | | | $ | 0 | | | $ | 10 | | | $ | 18 | | | $ | 0 | | | $ | 18 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Vacant Land, Land Development and Residential Construction: | | | | | | | | | | | | | | | | | | | | | |
| Grades 1 – 4 | | $ | 26,341 | | | $ | 9,003 | | | $ | 891 | | | $ | 2,257 | | | $ | 3,624 | | | $ | 6,597 | | | $ | 48,713 | | | $ | 7,606 | | | $ | 56,319 | |
| Grades 5 – 7 | | | 9,095 | | | | 32,486 | | | | 1,016 | | | | 1,111 | | | | 3,926 | | | | 4,128 | | | | 51,762 | | | | 2,448 | | | | 54,210 | |
| Grades 8 – 9 | | | 2,117 | | | | 0 | | | | 0 | | | | 0 | | | | 0 | | | | 0 | | | | 2,117 | | | | 0 | | | | 2,117 | |
| Total | | $ | 37,553 | | | $ | 41,489 | | | $ | 1,907 | | | $ | 3,368 | | | $ | 7,550 | | | $ | 10,725 | | | $ | 102,592 | | | $ | 10,054 | | | $ | 112,646 | |
| Year-to-date gross write offs | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Real Estate – Owner Occupied: | | | | | | | | | | | | | | | | | | | | | | | | | |
| Grades 1 – 4 | | $ | 70,377 | | | $ | 70,704 | | | $ | 95,233 | | | $ | 49,596 | | | $ | 69,883 | | | $ | 52,504 | | | $ | 408,297 | | | $ | 18,702 | | | $ | 426,999 | |
| Grades 5 – 7 | | | 108,756 | | | | 63,947 | | | | 52,328 | | | | 46,960 | | | | 30,455 | | | | 18,538 | | | | 320,984 | | | | 2,163 | | | | 323,147 | |
| Grades 8 – 9 | | | 391 | | | | 477 | | | | 1,533 | | | | 3,375 | | | | 0 | | | | 1,407 | | | | 7,183 | | | | 0 | | | | 7,183 | |
| Total | | $ | 179,524 | | | $ | 135,128 | | | $ | 149,094 | | | $ | 99,931 | | | $ | 100,338 | | | $ | 72,449 | | | $ | 736,464 | | | $ | 20,865 | | | $ | 757,329 | |
| Year-to-date gross write offs | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Real Estate – Non-Owner Occupied: | | | | | | | | | | | | | | | | | | | | | | | | | |
| Grades 1 – 4 | | $ | 103,694 | | | $ | 129,442 | | | $ | 72,203 | | | $ | 61,860 | | | $ | 79,256 | | | $ | 105,592 | | | $ | 552,047 | | | $ | 7,258 | | | $ | 559,305 | |
| Grades 5 – 7 | | | 150,480 | | | | 86,128 | | | | 122,685 | | | | 125,109 | | | | 52,664 | | | | 55,488 | | | | 592,554 | | | | 7,800 | | | | 600,354 | |
| Grades 8 – 9 | | | 0 | | | | 0 | | | | 0 | | | | 0 | | | | 0 | | | | 0 | | | | 0 | | | | 0 | | | | 0 | |
| Total | | $ | 254,174 | | | $ | 215,570 | | | $ | 194,888 | | | $ | 186,969 | | | $ | 131,920 | | | $ | 161,080 | | | $ | 1,144,601 | | | $ | 15,058 | | | $ | 1,159,659 | |
| Year-to-date gross write offs | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Real Estate – Multi-Family and Residential Rental: | | | | | | | | | | | | | | | | | | | | | | | | | |
| Grades 1 – 4 | | $ | 51,974 | | | $ | 39,678 | | | $ | 9,001 | | | $ | 12,381 | | | $ | 9,149 | | | $ | 41,276 | | | $ | 163,459 | | | $ | 5,695 | | | $ | 169,154 | |
| Grades 5 – 7 | | | 190,413 | | | | 105,288 | | | | 44,938 | | | | 12,460 | | | | 14,172 | | | | 5,633 | | | | 372,904 | | | | 0 | | | | 372,904 | |
| Grades 8 – 9 | | | 0 | | | | 0 | | | | 0 | | | | 0 | | | | 0 | | | | 0 | | | | 0 | | | | 0 | | | | 0 | |
| Total | | $ | 242,387 | | | $ | 144,966 | | | $ | 53,939 | | | $ | 24,841 | | | $ | 23,321 | | | $ | 46,909 | | | $ | 536,363 | | | $ | 5,695 | | | $ | 542,058 | |
| Year-to-date gross write offs | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | |
| Total Commercial | | $ | 917,154 | | | $ | 661,178 | | | $ | 515,039 | | | $ | 353,698 | | | $ | 277,203 | | | $ | 333,371 | | | $ | 3,057,643 | | | $ | 1,013,135 | | | $ | 4,070,778 | |
| Total Commercial year-to-date gross write offs | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 8 | | | $ | 0 | | | $ | 10 | | | $ | 18 | | | $ | 0 | | | $ | 18 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Retail: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| 1-4 Family Mortgages: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Performing | | $ | 81,332 | | | $ | 55,693 | | | $ | 36,038 | | | $ | 76,805 | | | $ | 249,978 | | | $ | 248,612 | | | $ | 748,458 | | | $ | 12,291 | | | $ | 760,749 | |
| Nonperforming | | | 0 | | | | 166 | | | | 220 | | | | 348 | | | | 936 | | | | 1,296 | | | | 2,966 | | | | 0 | | | | 2,966 | |
| Total | | $ | 81,332 | | | $ | 55,859 | | | $ | 36,258 | | | $ | 77,153 | | | $ | 250,914 | | | $ | 249,908 | | | $ | 751,424 | | | $ | 12,291 | | | $ | 763,715 | |
| Year-to-date gross write offs | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Other Consumer Loans: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Performing | | $ | 3,617 | | | $ | 4,351 | | | $ | 5,315 | | | $ | 4,320 | | | $ | 1,689 | | | $ | 1,456 | | | $ | 20,748 | | | $ | 97,595 | | | $ | 118,343 | |
| Nonperforming | | | 0 | | | | 0 | | | | 43 | | | | 0 | | | | 12 | | | | 51 | | | | 106 | | | | 0 | | | | 106 | |
| Total | | $ | 3,617 | | | $ | 4,351 | | | $ | 5,358 | | | $ | 4,320 | | | $ | 1,701 | | | $ | 1,507 | | | $ | 20,854 | | | $ | 97,595 | | | $ | 118,449 | |
| Year-to-date gross write offs | | $ | 0 | | | $ | 8 | | | $ | 19 | | | $ | 0 | | | $ | 1 | | | $ | 8 | | | $ | 36 | | | $ | 7 | | | $ | 43 | |
| Total Retail | | $ | 84,949 | | | $ | 60,210 | | | $ | 41,616 | | | $ | 81,473 | | | $ | 252,615 | | | $ | 251,415 | | | $ | 772,278 | | | $ | 109,886 | | | $ | 882,164 | |
| Total Retail year-to-date gross write offs | | $ | 0 | | | $ | 8 | | | $ | 19 | | | $ | 0 | | | $ | 1 | | | $ | 8 | | | $ | 36 | | | $ | 7 | | | $ | 43 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Total | | $ | 1,002,103 | | | $ | 721,388 | | | $ | 556,655 | | | $ | 435,171 | | | $ | 529,818 | | | $ | 584,786 | | | $ | 3,829,921 | | | $ | 1,123,021 | | | $ | 4,952,942 | |
| Total year-to-date gross write offs | | $ | 0 | | | $ | 8 | | | $ | 19 | | | $ | 8 | | | $ | 1 | | | $ | 18 | | | $ | 54 | | | $ | 7 | | | $ | 61 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Revolving | | | Grand | |
| (Dollars in thousands) | | 2025 | | | 2024 | | | 2023 | | | 2022 | | | 2021 | | | Prior | | | Term Total | | | Loans | | | Total | |
| Commercial: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Commercial and Industrial: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Grades 1 – 4 | | $ | 82,163 | | | $ | 57,225 | | | $ | 38,063 | | | $ | 12,554 | | | $ | 35,423 | | | $ | 14,878 | | | $ | 240,306 | | | $ | 415,084 | | | $ | 655,390 | |
| Grades 5 – 7 | | | 143,638 | | | | 125,617 | | | | 46,445 | | | | 23,137 | | | | 5,396 | | | | 3,092 | | | | 347,325 | | | | 357,379 | | | | 704,704 | |
| Grades 8 – 9 | | | 2,189 | | | | 0 | | | | 732 | | | | 0 | | | | 0 | | | | 327 | | | | 3,248 | | | | 11,180 | | | | 14,428 | |
| Total | | $ | 227,990 | | | $ | 182,842 | | | $ | 85,240 | | | $ | 35,691 | | | $ | 40,819 | | | $ | 18,297 | | | $ | 590,879 | | | $ | 783,643 | | | $ | 1,374,522 | |
| Year-to-date gross write offs | | $ | 0 | | | $ | 4 | | | $ | 76 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 80 | | | $ | 7 | | | $ | 87 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Vacant Land, Land Development and Residential Construction: | | | | | | | | | | | | | | | | | | | | | | | | | |
| Grades 1 – 4 | | $ | 22,242 | | | $ | 4,849 | | | $ | 1,703 | | | $ | 7,676 | | | $ | 2,410 | | | $ | 6,752 | | | $ | 45,632 | | | $ | 10,283 | | | $ | 55,915 | |
| Grades 5 – 7 | | | 37,052 | | | | 13,281 | | | | 1,635 | | | | 2,295 | | | | 520 | | | | 5,743 | | | | 60,526 | | | | 731 | | | | 61,257 | |
| Grades 8 – 9 | | | 0 | | | | 0 | | | | 0 | | | | 0 | | | | 201 | | | | 0 | | | | 201 | | | | 0 | | | | 201 | |
| Total | | $ | 59,294 | | | $ | 18,130 | | | $ | 3,338 | | | $ | 9,971 | | | $ | 3,131 | | | $ | 12,495 | | | $ | 106,359 | | | $ | 11,014 | | | $ | 117,373 | |
| Year-to-date gross write offs | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Real Estate – Owner Occupied: | | | | | | | | | | | | | | | | | | | | | | | | | |
| Grades 1 – 4 | | $ | 135,403 | | | $ | 137,672 | | | $ | 51,266 | | | $ | 77,169 | | | $ | 66,198 | | | $ | 18,302 | | | $ | 486,010 | | | $ | 7,686 | | | $ | 493,696 | |
| Grades 5 – 7 | | | 81,750 | | | | 59,874 | | | | 51,642 | | | | 53,479 | | | | 20,585 | | | | 9,085 | | | | 276,415 | | | | 1,285 | | | | 277,700 | |
| Grades 8 – 9 | | | 0 | | | | 0 | | | | 3,502 | | | | 2,674 | | | | 0 | | | | 1,297 | | | | 7,473 | | | | 0 | | | | 7,473 | |
| Total | | $ | 217,153 | | | $ | 197,546 | | | $ | 106,410 | | | $ | 133,322 | | | $ | 86,783 | | | $ | 28,684 | | | $ | 769,898 | | | $ | 8,971 | | | $ | 778,869 | |
| Year-to-date gross write offs | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Real Estate – Non-Owner Occupied: | | | | | | | | | | | | | | | | | | | | | | | | | |
| Grades 1 – 4 | | $ | 93,669 | | | $ | 83,447 | | | $ | 55,500 | | | $ | 65,525 | | | $ | 73,727 | | | $ | 53,148 | | | $ | 425,016 | | | $ | 9,709 | | | $ | 434,725 | |
| Grades 5 – 7 | | | 145,795 | | | | 153,731 | | | | 170,018 | | | | 77,964 | | | | 69,335 | | | | 51,411 | | | | 668,254 | | | | 4,963 | | | | 673,217 | |
| Grades 8 – 9 | | | 2,732 | | | | 0 | | | | 0 | | | | 0 | | | | 0 | | | | 0 | | | | 2,732 | | | | 0 | | | | 2,732 | |
| Total | | $ | 242,196 | | | $ | 237,178 | | | $ | 225,518 | | | $ | 143,489 | | | $ | 143,062 | | | $ | 104,559 | | | $ | 1,096,002 | | | $ | 14,672 | | | $ | 1,110,674 | |
| Year-to-date gross write offs | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Real Estate – Multi-Family and Residential Rental: | | | | | | | | | | | | | | | | | | | | | | | | | |
| Grades 1 – 4 | | $ | 40,264 | | | $ | 13,603 | | | $ | 32,341 | | | $ | 9,449 | | | $ | 32,465 | | | $ | 23,399 | | | $ | 151,521 | | | $ | 0 | | | $ | 151,521 | |
| Grades 5 – 7 | | | 165,703 | | | | 55,785 | | | | 128,190 | | | | 27,959 | | | | 1,862 | | | | 6,204 | | | | 385,703 | | | | 0 | | | | 385,703 | |
| Grades 8 – 9 | | | 0 | | | | 0 | | | | 0 | | | | 0 | | | | 0 | | | | 0 | | | | 0 | | | | 0 | | | | 0 | |
| Total | | $ | 205,967 | | | $ | 69,388 | | | $ | 160,531 | | | $ | 37,408 | | | $ | 34,327 | | | $ | 29,603 | | | $ | 537,224 | | | $ | 0 | | | $ | 537,224 | |
| Year-to-date gross write offs | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 0 | |
| Total Commercial | | $ | 952,600 | | | $ | 705,084 | | | $ | 581,037 | | | $ | 359,881 | | | $ | 308,122 | | | $ | 193,638 | | | $ | 3,100,362 | | | $ | 818,300 | | | $ | 3,918,662 | |
| Total Commercial year-to-date gross write offs | | $ | 0 | | | $ | 4 | | | $ | 76 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 80 | | | $ | 7 | | | $ | 87 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Retail: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| 1-4 Family Mortgages: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Performing | | $ | 62,063 | | | $ | 52,546 | | | $ | 102,023 | | | $ | 280,078 | | | $ | 181,242 | | | $ | 107,389 | | | $ | 785,341 | | | $ | 2,570 | | | $ | 787,911 | |
| Nonperforming | | | 0 | | | | 241 | | | | 451 | | | | 1,047 | | | | 347 | | | | 860 | | | | 2,946 | | | | 0 | | | | 2,946 | |
| Total | | $ | 62,063 | | | $ | 52,787 | | | $ | 102,474 | | | $ | 281,125 | | | $ | 181,589 | | | $ | 108,249 | | | $ | 788,287 | | | $ | 2,570 | | | $ | 790,857 | |
| Year-to-date gross write offs | | $ | 0 | | | $ | 0 | | | $ | 85 | | | $ | 22 | | | $ | 61 | | | $ | 3 | | | $ | 171 | | | $ | 0 | | | $ | 171 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Other Consumer Loans: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Performing | | $ | 6,574 | | | $ | 8,299 | | | $ | 7,056 | | | $ | 3,358 | | | $ | 1,274 | | | $ | 894 | | | $ | 27,455 | | | $ | 84,833 | | | $ | 112,288 | |
| Nonperforming | | | 0 | | | | 0 | | | | 0 | | | | 9 | | | | 5 | | | | 42 | | | | 56 | | | | 25 | | | | 81 | |
| Total | | $ | 6,574 | | | $ | 8,299 | | | $ | 7,056 | | | $ | 3,367 | | | $ | 1,279 | | | $ | 936 | | | $ | 27,511 | | | $ | 84,858 | | | $ | 112,369 | |
| Year-to-date gross write offs | | $ | 2 | | | $ | 2 | | | $ | 6 | | | $ | 0 | | | $ | 0 | | | $ | 0 | | | $ | 10 | | | $ | 5 | | | $ | 15 | |
| Total Retail | | $ | 68,637 | | | $ | 61,086 | | | $ | 109,530 | | | $ | 284,492 | | | $ | 182,868 | | | $ | 109,185 | | | $ | 815,798 | | | $ | 87,428 | | | $ | 903,226 | |
| Total Retail year-to-date gross write offs | | $ | 2 | | | $ | 2 | | | $ | 91 | | | $ | 22 | | | $ | 61 | | | $ | 3 | | | $ | 181 | | | $ | 5 | | | $ | 186 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Total | | $ | 1,021,237 | | | $ | 766,170 | | | $ | 690,567 | | | $ | 644,373 | | | $ | 490,990 | | | $ | 302,823 | | | $ | 3,916,160 | | | $ | 905,728 | | | $ | 4,821,888 | |
| Total year-to-date gross write offs | | $ | 2 | | | $ | 6 | | | $ | 167 | | | $ | 22 | | | $ | 61 | | | $ | 3 | | | $ | 261 | | | $ | 12 | | | $ | 273 | |
|