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Note 5 - Loans and the Allowance for Credit Losses - Loans by Origination and Risk Designation (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
Originated Current Fiscal Year | $ 74,321 |  | $ 444,378
Originated One Year Prior | 427,604 |  | 1,873,427
Originated Two Years Prior | 1,869,141 |  | 1,891,130
Originated Three Years Prior | 1,861,663 |  | 419,300
Originated Four Years Prior | 408,966 |  | 389,442
Originated Five or More Years Prior | 1,802,395 |  | 1,497,749
Revolving Loans | 1,860,011 |  | 1,836,415
Gross loans | 8,304,101 |  | 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 | 300 |  | 0
Gross write-off, three years prior | 0 |  | 0
Gross write-off, four years prior | 0 |  | 280
Gross write-off, five years prior | 2,885 |  | 13,236
Gross write-off, revolving | 0 |  | 82
Gross write-off | 3,185 | $ 4,484 | 17,049
Pass [Member] |  |  |
Originated Current Fiscal Year | 74,321 |  | 444,128
Originated One Year Prior | 427,354 |  | 1,862,368
Originated Two Years Prior | 1,858,330 |  | 1,888,446
Originated Three Years Prior | 1,859,002 |  | 419,299
Originated Four Years Prior | 408,948 |  | 387,013
Originated Five or More Years Prior | 1,741,426 |  | 1,435,499
Revolving Loans | 1,827,238 |  | 1,802,411
Gross loans | 8,196,619 |  | 8,239,164
Special Mention [Member] |  |  |
Originated Current Fiscal Year | 0 |  | 0
Originated One Year Prior | 0 |  | 10,620
Originated Two Years Prior | 10,687 |  | 0
Originated Three Years Prior | 0 |  | 0
Originated Four Years Prior | 18 |  | 562
Originated Five or More Years Prior | 27,315 |  | 28,270
Revolving Loans | 14,694 |  | 14,716
Gross loans | 52,714 |  | 54,168
Substandard [Member] |  |  |
Originated Current Fiscal Year | 0 |  | 250
Originated One Year Prior | 250 |  | 439
Originated Two Years Prior | 124 |  | 2,684
Originated Three Years Prior | 2,661 |  | 1
Originated Four Years Prior | 0 |  | 1,867
Originated Five or More Years Prior | 33,654 |  | 33,980
Revolving Loans | 18,079 |  | 19,288
Gross loans | 54,768 |  | 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 | 8,719 |  | 178,832
Originated One Year Prior | 163,879 |  | 263,210
Originated Two Years Prior | 264,701 |  | 265,946
Originated Three Years Prior | 257,635 |  | 38,910
Originated Four Years Prior | 37,530 |  | 14,900
Originated Five or More Years Prior | 129,219 |  | 127,257
Revolving Loans | 710,811 |  | 689,675
Gross loans | 1,572,494 |  | 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 | 300 |  | 0
Gross write-off, three years prior | 0 |  | 0
Gross write-off, four years prior | 0 |  | 280
Gross write-off, five years prior | 0 |  | 11,094
Gross write-off, revolving | 0 |  | 63
Gross write-off | 300 | 2,767 | 14,888
Commercial Portfolio Segment [Member] | Pass [Member] |  |  |
Originated Current Fiscal Year | 8,719 |  | 178,582
Originated One Year Prior | 163,629 |  | 252,151
Originated Two Years Prior | 253,890 |  | 265,705
Originated Three Years Prior | 257,399 |  | 38,909
Originated Four Years Prior | 37,512 |  | 13,726
Originated Five or More Years Prior | 112,276 |  | 112,145
Revolving Loans | 706,574 |  | 684,779
Gross loans | 1,539,999 |  | 1,545,997
Commercial Portfolio Segment [Member] | Special Mention [Member] |  |  |
Originated Current Fiscal Year | 0 |  | 0
Originated One Year Prior | 0 |  | 10,620
Originated Two Years Prior | 10,687 |  | 0
Originated Three Years Prior | 0 |  | 0
Originated Four Years Prior | 18 |  | 562
Originated Five or More Years Prior | 3,945 |  | 3,417
Revolving Loans | 3,184 |  | 3,199
Gross loans | 17,834 |  | 17,798
Commercial Portfolio Segment [Member] | Substandard [Member] |  |  |
Originated Current Fiscal Year | 0 |  | 250
Originated One Year Prior | 250 |  | 439
Originated Two Years Prior | 124 |  | 241
Originated Three Years Prior | 236 |  | 1
Originated Four Years Prior | 0 |  | 612
Originated Five or More Years Prior | 12,998 |  | 11,695
Revolving Loans | 1,053 |  | 1,697
Gross loans | 14,661 |  | 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 | 55,180 |  | 248,660
Originated One Year Prior | 247,846 |  | 1,561,841
Originated Two Years Prior | 1,557,645 |  | 1,586,997
Originated Three Years Prior | 1,566,041 |  | 352,445
Originated Four Years Prior | 343,799 |  | 354,646
Originated Five or More Years Prior | 1,563,877 |  | 1,276,583
Revolving Loans | 495,562 |  | 514,373
Gross loans | 5,829,950 |  | 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 | 2,885 |  | 2,142
Gross write-off, revolving | 0 |  | 0
Gross write-off | 2,885 | 1,717 | 2,142
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] |  |  |
Originated Current Fiscal Year | 55,180 |  | 248,660
Originated One Year Prior | 247,846 |  | 1,561,841
Originated Two Years Prior | 1,557,645 |  | 1,585,109
Originated Three Years Prior | 1,564,163 |  | 352,445
Originated Four Years Prior | 343,799 |  | 353,391
Originated Five or More Years Prior | 1,521,233 |  | 1,232,240
Revolving Loans | 478,777 |  | 497,588
Gross loans | 5,768,643 |  | 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 | 0 |  | 0
Originated Three Years Prior | 0 |  | 0
Originated Four Years Prior | 0 |  | 0
Originated Five or More Years Prior | 22,723 |  | 24,202
Revolving Loans | 0 |  | 0
Gross loans | 22,723 |  | 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 | 0 |  | 1,888
Originated Three Years Prior | 1,878 |  | 0
Originated Four Years Prior | 0 |  | 1,255
Originated Five or More Years Prior | 19,921 |  | 20,141
Revolving Loans | 16,785 |  | 16,785
Gross loans | 38,584 |  | 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 | 5,250 |  | 582
Originated One Year Prior | 582 |  | 5,463
Originated Two Years Prior | 4,201 |  | 15,645
Originated Three Years Prior | 15,608 |  | 6,236
Originated Four Years Prior | 6,236 |  | 0
Originated Five or More Years Prior | 0 |  | 0
Revolving Loans | 614,716 |  | 592,570
Gross loans | 646,593 |  | 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 | 5,250 |  | 582
Originated One Year Prior | 582 |  | 5,463
Originated Two Years Prior | 4,201 |  | 15,645
Originated Three Years Prior | 15,608 |  | 6,236
Originated Four Years Prior | 6,236 |  | 0
Originated Five or More Years Prior | 0 |  | 0
Revolving Loans | 606,016 |  | 583,870
Gross loans | 637,893 |  | 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 | 8,700 |  | 8,700
Gross loans | 8,700 |  | 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 | 0 |  | 0
Gross loans | 0 |  | 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 | 4,466 |  | 15,455
Originated One Year Prior | 15,268 |  | 42,830
Originated Two Years Prior | 42,558 |  | 22,542
Originated Three Years Prior | 22,379 |  | 21,704
Originated Four Years Prior | 21,396 |  | 19,896
Originated Five or More Years Prior | 109,299 |  | 93,909
Revolving Loans | 38,848 |  | 39,705
Gross loans | 254,214 |  | 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 | (0) | 18
Residential Portfolio Segment [Member] | Pass [Member] |  |  |
Originated Current Fiscal Year | 4,466 |  | 15,455
Originated One Year Prior | 15,268 |  | 42,830
Originated Two Years Prior | 42,558 |  | 21,987
Originated Three Years Prior | 21,832 |  | 21,704
Originated Four Years Prior | 21,396 |  | 19,896
Originated Five or More Years Prior | 107,917 |  | 91,114
Revolving Loans | 35,797 |  | 36,082
Gross loans | 249,234 |  | 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 | 647 |  | 651
Revolving Loans | 2,810 |  | 2,817
Gross loans | 3,457 |  | 3,468
Residential Portfolio Segment [Member] | Substandard [Member] |  |  |
Originated Current Fiscal Year | 0 |  | 0
Originated One Year Prior | 0 |  | 0
Originated Two Years Prior | 0 |  | 555
Originated Three Years Prior | 547 |  | 0
Originated Four Years Prior | 0 |  | 0
Originated Five or More Years Prior | 735 |  | 2,144
Revolving Loans | 241 |  | 806
Gross loans | 1,523 |  | 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 | 706 |  | 849
Originated One Year Prior | 29 |  | 83
Originated Two Years Prior | 36 |  | 0
Originated Three Years Prior | 0 |  | 5
Originated Four Years Prior | 5 |  | 0
Originated Five or More Years Prior | 0 |  | 0
Revolving Loans | 74 |  | 92
Gross loans | 850 |  | 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 | $ (0) | 1
Consumer Portfolio Segment [Member] | Pass [Member] |  |  |
Originated Current Fiscal Year | 706 |  | 849
Originated One Year Prior | 29 |  | 83
Originated Two Years Prior | 36 |  | 0
Originated Three Years Prior | 0 |  | 5
Originated Four Years Prior | 5 |  | 0
Originated Five or More Years Prior | 0 |  | 0
Revolving Loans | 74 |  | 92
Gross loans | 850 |  | 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

X
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