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Note 5 - Loans and the Allowance for Credit Losses - Loans by Origination and Risk Designation (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Originated Current Fiscal Year | $ 511,688 | $ 444,378 |
Originated One Year Prior | 443,185 | 1,873,427 |
Originated Two Years Prior | 1,724,765 | 1,891,130 |
Originated Three Years Prior | 1,782,673 | 419,300 |
Originated Four Years Prior | 397,679 | 389,442 |
Originated Five or More Years Prior | 1,685,185 | 1,497,749 |
Revolving Loans | 1,735,307 | 1,836,415 |
Gross loans | 8,280,482 | 8,351,841 |
Gross write-off, current year | 0 | 54 |
Gross write-off, one year prior | 0 | 3,397 |
Gross write-off, two years prior | 1,003 | 0 |
Gross write-off, three years prior | 49 | 0 |
Gross write-off, four years prior | 0 | 280 |
Gross write-off, five years prior | 10,732 | 13,236 |
Gross write-off, revolving | 1,918 | 82 |
Gross write-off | 13,702 | 17,049 | $ 5,443
Pass [Member] |  |  |
Originated Current Fiscal Year | 509,780 | 444,128 |
Originated One Year Prior | 440,166 | 1,862,368 |
Originated Two Years Prior | 1,660,146 | 1,888,446 |
Originated Three Years Prior | 1,778,072 | 419,299 |
Originated Four Years Prior | 393,127 | 387,013 |
Originated Five or More Years Prior | 1,566,356 | 1,435,499 |
Revolving Loans | 1,711,061 | 1,802,411 |
Gross loans | 8,058,708 | 8,239,164 |
Special Mention [Member] |  |  |
Originated Current Fiscal Year | 1,908 | 0 |
Originated One Year Prior | 0 | 10,620 |
Originated Two Years Prior | 56,459 | 0 |
Originated Three Years Prior | 2,538 | 0 |
Originated Four Years Prior | 1,643 | 562 |
Originated Five or More Years Prior | 66,563 | 28,270 |
Revolving Loans | 20,264 | 14,716 |
Gross loans | 149,375 | 54,168 |
Substandard [Member] |  |  |
Originated Current Fiscal Year | 0 | 250 |
Originated One Year Prior | 3,019 | 439 |
Originated Two Years Prior | 8,160 | 2,684 |
Originated Three Years Prior | 2,063 | 1 |
Originated Four Years Prior | 2,909 | 1,867 |
Originated Five or More Years Prior | 52,266 | 33,980 |
Revolving Loans | 3,982 | 19,288 |
Gross loans | 72,399 | 58,509 |
Doubtful [Member] |  |  |
Originated Current Fiscal Year | 0 | 0 |
Originated One Year Prior | 0 | 0 |
Originated Two Years Prior | 0 | 0 |
Originated Three Years Prior | 0 | 0 |
Originated Four Years Prior | 0 | 0 |
Originated Five or More Years Prior | 0 | 0 |
Revolving Loans | 0 | 0 |
Gross loans | 0 | 0 |
Commercial Portfolio Segment [Member] |  |  |
Originated Current Fiscal Year | 69,206 | 178,832 |
Originated One Year Prior | 160,086 | 263,210 |
Originated Two Years Prior | 201,124 | 265,946 |
Originated Three Years Prior | 239,820 | 38,910 |
Originated Four Years Prior | 31,360 | 14,900 |
Originated Five or More Years Prior | 133,894 | 127,257 |
Revolving Loans | 697,240 | 689,675 |
Gross loans | 1,532,730 | 1,578,730 |
Gross write-off, current year | 0 | 54 |
Gross write-off, one year prior | 0 | 3,397 |
Gross write-off, two years prior | 1,003 | 0 |
Gross write-off, three years prior | 49 | 0 |
Gross write-off, four years prior | 0 | 280 |
Gross write-off, five years prior | 316 | 11,094 |
Gross write-off, revolving | 1,918 | 63 |
Gross write-off | 3,286 | 14,888 | 2,612
Commercial Portfolio Segment [Member] | Pass [Member] |  |  |
Originated Current Fiscal Year | 67,298 | 178,582 |
Originated One Year Prior | 157,067 | 252,151 |
Originated Two Years Prior | 194,602 | 265,705 |
Originated Three Years Prior | 237,065 | 38,909 |
Originated Four Years Prior | 29,717 | 13,726 |
Originated Five or More Years Prior | 111,841 | 112,145 |
Revolving Loans | 678,206 | 684,779 |
Gross loans | 1,475,796 | 1,545,997 |
Commercial Portfolio Segment [Member] | Special Mention [Member] |  |  |
Originated Current Fiscal Year | 1,908 | 0 |
Originated One Year Prior | 0 | 10,620 |
Originated Two Years Prior | 2,817 | 0 |
Originated Three Years Prior | 2,538 | 0 |
Originated Four Years Prior | 1,643 | 562 |
Originated Five or More Years Prior | 6,209 | 3,417 |
Revolving Loans | 17,491 | 3,199 |
Gross loans | 32,606 | 17,798 |
Commercial Portfolio Segment [Member] | Substandard [Member] |  |  |
Originated Current Fiscal Year | 0 | 250 |
Originated One Year Prior | 3,019 | 439 |
Originated Two Years Prior | 3,705 | 241 |
Originated Three Years Prior | 217 | 1 |
Originated Four Years Prior | 0 | 612 |
Originated Five or More Years Prior | 15,844 | 11,695 |
Revolving Loans | 1,543 | 1,697 |
Gross loans | 24,328 | 14,935 |
Commercial Portfolio Segment [Member] | Doubtful [Member] |  |  |
Originated Current Fiscal Year | 0 | 0 |
Originated One Year Prior | 0 | 0 |
Originated Two Years Prior | 0 | 0 |
Originated Three Years Prior | 0 | 0 |
Originated Four Years Prior | 0 | 0 |
Originated Five or More Years Prior | 0 | 0 |
Revolving Loans | 0 | 0 |
Gross loans | 0 | 0 |
Commercial Real Estate Portfolio Segment [Member] |  |  |
Originated Current Fiscal Year | 408,314 | 248,660 |
Originated One Year Prior | 268,533 | 1,561,841 |
Originated Two Years Prior | 1,481,673 | 1,586,997 |
Originated Three Years Prior | 1,511,933 | 352,445 |
Originated Four Years Prior | 341,305 | 354,646 |
Originated Five or More Years Prior | 1,453,635 | 1,276,583 |
Revolving Loans | 415,286 | 514,373 |
Gross loans | 5,880,679 | 5,895,545 |
Gross write-off, current year | 0 | 0 |
Gross write-off, one year prior | 0 | 0 |
Gross write-off, two years prior | 0 | 0 |
Gross write-off, three years prior | 0 | 0 |
Gross write-off, four years prior | 0 | 0 |
Gross write-off, five years prior | 10,416 | 2,142 |
Gross write-off, revolving | 0 | 0 |
Gross write-off | 10,416 | 2,142 | 2,819
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] |  |  |
Originated Current Fiscal Year | 408,314 | 248,660 |
Originated One Year Prior | 268,533 | 1,561,841 |
Originated Two Years Prior | 1,424,209 | 1,585,109 |
Originated Three Years Prior | 1,510,087 | 352,445 |
Originated Four Years Prior | 339,553 | 353,391 |
Originated Five or More Years Prior | 1,357,858 | 1,232,240 |
Revolving Loans | 415,286 | 497,588 |
Gross loans | 5,723,840 | 5,831,274 |
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] |  |  |
Originated Current Fiscal Year | 0 | 0 |
Originated One Year Prior | 0 | 0 |
Originated Two Years Prior | 53,642 | 0 |
Originated Three Years Prior | 0 | 0 |
Originated Four Years Prior | 0 | 0 |
Originated Five or More Years Prior | 59,719 | 24,202 |
Revolving Loans | 0 | 0 |
Gross loans | 113,361 | 24,202 |
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] |  |  |
Originated Current Fiscal Year | 0 | 0 |
Originated One Year Prior | 0 | 0 |
Originated Two Years Prior | 3,822 | 1,888 |
Originated Three Years Prior | 1,846 | 0 |
Originated Four Years Prior | 1,752 | 1,255 |
Originated Five or More Years Prior | 36,058 | 20,141 |
Revolving Loans | 0 | 16,785 |
Gross loans | 43,478 | 40,069 |
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member] |  |  |
Originated Current Fiscal Year | 0 | 0 |
Originated One Year Prior | 0 | 0 |
Originated Two Years Prior | 0 | 0 |
Originated Three Years Prior | 0 | 0 |
Originated Four Years Prior | 0 | 0 |
Originated Five or More Years Prior | 0 | 0 |
Revolving Loans | 0 | 0 |
Gross loans | 0 | 0 |
Commercial Construction Portfolio Segment [Member] |  |  |
Originated Current Fiscal Year | 15,390 | 582 |
Originated One Year Prior | 0 | 5,463 |
Originated Two Years Prior | 2,137 | 15,645 |
Originated Three Years Prior | 8,995 | 6,236 |
Originated Four Years Prior | 6,518 | 0 |
Originated Five or More Years Prior | 0 | 0 |
Revolving Loans | 583,206 | 592,570 |
Gross loans | 616,246 | 620,496 |
Gross write-off, current year | 0 | 0 |
Gross write-off, one year prior | 0 | 0 |
Gross write-off, two years prior | 0 | 0 |
Gross write-off, three years prior | 0 | 0 |
Gross write-off, four years prior | 0 | 0 |
Gross write-off, five years prior | 0 | 0 |
Gross write-off, revolving | 0 | 0 |
Gross write-off | 0 | 0 | (0)
Commercial Construction Portfolio Segment [Member] | Pass [Member] |  |  |
Originated Current Fiscal Year | 15,390 | 582 |
Originated One Year Prior | 0 | 5,463 |
Originated Two Years Prior | 2,137 | 15,645 |
Originated Three Years Prior | 8,995 | 6,236 |
Originated Four Years Prior | 6,518 | 0 |
Originated Five or More Years Prior | 0 | 0 |
Revolving Loans | 581,002 | 583,870 |
Gross loans | 614,042 | 611,796 |
Commercial Construction Portfolio Segment [Member] | Special Mention [Member] |  |  |
Originated Current Fiscal Year | 0 | 0 |
Originated One Year Prior | 0 | 0 |
Originated Two Years Prior | 0 | 0 |
Originated Three Years Prior | 0 | 0 |
Originated Four Years Prior | 0 | 0 |
Originated Five or More Years Prior | 0 | 0 |
Revolving Loans | 0 | 8,700 |
Gross loans | 0 | 8,700 |
Commercial Construction Portfolio Segment [Member] | Substandard [Member] |  |  |
Originated Current Fiscal Year | 0 | 0 |
Originated One Year Prior | 0 | 0 |
Originated Two Years Prior | 0 | 0 |
Originated Three Years Prior | 0 | 0 |
Originated Four Years Prior | 0 | 0 |
Originated Five or More Years Prior | 0 | 0 |
Revolving Loans | 2,204 | 0 |
Gross loans | 2,204 | 0 |
Commercial Construction Portfolio Segment [Member] | Doubtful [Member] |  |  |
Originated Current Fiscal Year | 0 | 0 |
Originated One Year Prior | 0 | 0 |
Originated Two Years Prior | 0 | 0 |
Originated Three Years Prior | 0 | 0 |
Originated Four Years Prior | 0 | 0 |
Originated Five or More Years Prior | 0 | 0 |
Revolving Loans | 0 | 0 |
Gross loans | 0 | 0 |
Residential Portfolio Segment [Member] |  |  |
Originated Current Fiscal Year | 17,763 | 15,455 |
Originated One Year Prior | 14,542 | 42,830 |
Originated Two Years Prior | 39,830 | 22,542 |
Originated Three Years Prior | 21,925 | 21,704 |
Originated Four Years Prior | 18,496 | 19,896 |
Originated Five or More Years Prior | 97,656 | 93,909 |
Revolving Loans | 39,479 | 39,705 |
Gross loans | 249,691 | 256,041 |
Gross write-off, current year | 0 | 0 |
Gross write-off, one year prior | 0 | 0 |
Gross write-off, two years prior | 0 | 0 |
Gross write-off, three years prior | 0 | 0 |
Gross write-off, four years prior | 0 | 0 |
Gross write-off, five years prior | 0 | 0 |
Gross write-off, revolving | 0 | 18 |
Gross write-off | 0 | 18 | 9
Residential Portfolio Segment [Member] | Pass [Member] |  |  |
Originated Current Fiscal Year | 17,763 | 15,455 |
Originated One Year Prior | 14,542 | 42,830 |
Originated Two Years Prior | 39,197 | 21,987 |
Originated Three Years Prior | 21,925 | 21,704 |
Originated Four Years Prior | 17,339 | 19,896 |
Originated Five or More Years Prior | 96,657 | 91,114 |
Revolving Loans | 36,471 | 36,082 |
Gross loans | 243,894 | 249,068 |
Residential Portfolio Segment [Member] | Special Mention [Member] |  |  |
Originated Current Fiscal Year | 0 | 0 |
Originated One Year Prior | 0 | 0 |
Originated Two Years Prior | 0 | 0 |
Originated Three Years Prior | 0 | 0 |
Originated Four Years Prior | 0 | 0 |
Originated Five or More Years Prior | 635 | 651 |
Revolving Loans | 2,773 | 2,817 |
Gross loans | 3,408 | 3,468 |
Residential Portfolio Segment [Member] | Substandard [Member] |  |  |
Originated Current Fiscal Year | 0 | 0 |
Originated One Year Prior | 0 | 0 |
Originated Two Years Prior | 633 | 555 |
Originated Three Years Prior | 0 | 0 |
Originated Four Years Prior | 1,157 | 0 |
Originated Five or More Years Prior | 364 | 2,144 |
Revolving Loans | 235 | 806 |
Gross loans | 2,389 | 3,505 |
Residential Portfolio Segment [Member] | Doubtful [Member] |  |  |
Originated Current Fiscal Year | 0 | 0 |
Originated One Year Prior | 0 | 0 |
Originated Two Years Prior | 0 | 0 |
Originated Three Years Prior | 0 | 0 |
Originated Four Years Prior | 0 | 0 |
Originated Five or More Years Prior | 0 | 0 |
Revolving Loans | 0 | 0 |
Gross loans | 0 | 0 |
Consumer Portfolio Segment [Member] |  |  |
Originated Current Fiscal Year | 1,015 | 849 |
Originated One Year Prior | 24 | 83 |
Originated Two Years Prior | 1 | 0 |
Originated Three Years Prior | 0 | 5 |
Originated Four Years Prior | 0 | 0 |
Originated Five or More Years Prior | 0 | 0 |
Revolving Loans | 96 | 92 |
Gross loans | 1,136 | 1,029 |
Gross write-off, current year | 0 | 0 |
Gross write-off, one year prior | 0 | 0 |
Gross write-off, two years prior | 0 | 0 |
Gross write-off, three years prior | 0 | 0 |
Gross write-off, four years prior | 0 | 0 |
Gross write-off, five years prior | 0 | 0 |
Gross write-off, revolving | 0 | 1 |
Gross write-off | 0 | 1 | $ 3
Consumer Portfolio Segment [Member] | Pass [Member] |  |  |
Originated Current Fiscal Year | 1,015 | 849 |
Originated One Year Prior | 24 | 83 |
Originated Two Years Prior | 1 | 0 |
Originated Three Years Prior | 0 | 5 |
Originated Four Years Prior | 0 | 0 |
Originated Five or More Years Prior | 0 | 0 |
Revolving Loans | 96 | 92 |
Gross loans | 1,136 | 1,029 |
Consumer Portfolio Segment [Member] | Special Mention [Member] |  |  |
Originated Current Fiscal Year | 0 | 0 |
Originated One Year Prior | 0 | 0 |
Originated Two Years Prior | 0 | 0 |
Originated Three Years Prior | 0 | 0 |
Originated Four Years Prior | 0 | 0 |
Originated Five or More Years Prior | 0 | 0 |
Revolving Loans | 0 | 0 |
Gross loans | 0 | 0 |
Consumer Portfolio Segment [Member] | Substandard [Member] |  |  |
Originated Current Fiscal Year | 0 | 0 |
Originated One Year Prior | 0 | 0 |
Originated Two Years Prior | 0 | 0 |
Originated Three Years Prior | 0 | 0 |
Originated Four Years Prior | 0 | 0 |
Originated Five or More Years Prior | 0 | 0 |
Revolving Loans | 0 | 0 |
Gross loans | 0 | 0 |
Consumer Portfolio Segment [Member] | Doubtful [Member] |  |  |
Originated Current Fiscal Year | 0 | 0 |
Originated One Year Prior | 0 | 0 |
Originated Two Years Prior | 0 | 0 |
Originated Three Years Prior | 0 | 0 |
Originated Four Years Prior | 0 | 0 |
Originated Five or More Years Prior | 0 | 0 |
Revolving Loans | 0 | 0 |
Gross loans | $ 0 | $ 0 |

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