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Note 4 - Loans - Loan Held for Investment by Loan Portfolio Segments, Internal Risk Ratings and Vintage Year (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Loans originated in current year | $ 2,545,564 | $ 3,724,618
Loans originated year prior | 3,349,730 | 3,581,730
Loans originated three years prior | 3,168,851 | 3,052,314
Loans originated four years prior | 2,593,759 | 1,588,314
Loans originated five years prior | 1,364,973 | 1,686,965
Total, Loans Amortized Cost Basis by Origination Year Prior | 4,069,831 | 3,571,544
Total, Revolving Loans | 2,248,231 | 2,306,710
Total, Revolving Converted to Term Loans | 24,475 | 25,225
Total loans | 19,365,414 | 19,537,420
Loans originated in current year, write offs | 188 | 0
Loans originated year prior, write offs | 1,586 | 992
Loans originated three years prior, write offs | 3,166 | 1,520
Loans originated four years prior, write offs | 9,009 | 384
Loans originated five years prior, write offs | 553 | 4,641
Total, Loans Amortized Cost Basis by Origination Year Prior, Write Offs | 4,237 | 14,429
Total, Revolving Loans Write Offs | 12,733 | 1,520
Total, Revolving Converted to Term Loans, Write Offs | 0 | 0
YTD gross write-offs | 31,472 | 23,486
Total loans | 19,365,414 | 19,537,420
Commercial Portfolio Segment [Member] |  |
Loans originated in current year | 402,743 | 387,945
Loans originated year prior | 259,797 | 329,467
Loans originated three years prior | 216,034 | 345,104
Loans originated four years prior | 211,728 | 122,567
Loans originated five years prior | 58,833 | 76,044
Total, Loans Amortized Cost Basis by Origination Year Prior | 102,119 | 141,937
Total, Revolving Loans | 1,835,445 | 1,890,712
Total, Revolving Converted to Term Loans | 8,026 | 8,424
Total loans | 3,094,725 | 3,302,200
Loans originated in current year, write offs | 188 | 0
Loans originated year prior, write offs | 1,586 | 977
Loans originated three years prior, write offs | 3,151 | 1,312
Loans originated four years prior, write offs | 8,950 | 384
Loans originated five years prior, write offs | 257 | 3,672
Total, Loans Amortized Cost Basis by Origination Year Prior, Write Offs | 64 | 6,044
Total, Revolving Loans Write Offs | 12,730 | 1,520
Total, Revolving Converted to Term Loans, Write Offs | 0 | 0
YTD gross write-offs | 26,926 | 13,909
Total loans | 3,094,725 | 3,302,200
Commercial Portfolio Segment [Member] | Pass [Member] |  |
Loans originated in current year | 400,836 | 381,705
Loans originated year prior | 237,303 | 323,939
Loans originated three years prior | 203,190 | 326,650
Loans originated four years prior | 201,837 | 96,725
Loans originated five years prior | 27,359 | 75,281
Total, Loans Amortized Cost Basis by Origination Year Prior | 90,724 | 136,162
Total, Revolving Loans | 1,675,260 | 1,775,162
Total, Revolving Converted to Term Loans | 7,804 | 8,308
Total loans | 2,844,313 | 3,123,932
Total loans | 2,844,313 | 3,123,932
Commercial Portfolio Segment [Member] | Special Mention [Member] |  |
Loans originated in current year | 0 | 4,488
Loans originated year prior | 17,424 | 4,875
Loans originated three years prior | 740 | 8,559
Loans originated four years prior | 0 | 23,380
Loans originated five years prior | 9,117 | 0
Total, Loans Amortized Cost Basis by Origination Year Prior | 5,139 | 0
Total, Revolving Loans | 92,632 | 75,419
Total, Revolving Converted to Term Loans | 0 | 0
Total loans | 125,052 | 116,721
Total loans | 125,052 | 116,721
Commercial Portfolio Segment [Member] | Substandard [Member] |  |
Loans originated in current year | 50 | 1,752
Loans originated year prior | 5,070 | 653
Loans originated three years prior | 12,104 | 9,895
Loans originated four years prior | 6,773 | 2,462
Loans originated five years prior | 22,357 | 763
Total, Loans Amortized Cost Basis by Origination Year Prior | 6,256 | 5,775
Total, Revolving Loans | 67,553 | 40,131
Total, Revolving Converted to Term Loans | 222 | 116
Total loans | 120,385 | 61,547
Total loans | 120,385 | 61,547
Commercial Portfolio Segment [Member] | Doubtful [Member] |  |
Loans originated in current year | 1,857 | 0
Loans originated year prior | 0 | 0
Loans originated three years prior | 0 | 0
Loans originated four years prior | 3,118 | 0
Loans originated five years prior | 0 | 0
Total, Loans Amortized Cost Basis by Origination Year Prior | 0 | 0
Total, Revolving Loans | 0 | 0
Total, Revolving Converted to Term Loans | 0 | 0
Total loans | 4,975 | 0
Total loans | 4,975 | 0
Real Estate Construction Portfolio Segment [Member] |  |
Loans originated in current year | 22,562 | 31,461
Loans originated year prior | 60,065 | 131,984
Loans originated three years prior | 126,200 | 165,684
Loans originated four years prior | 93,115 | 44,850
Loans originated five years prior | 16,858 | 21,034
Total, Loans Amortized Cost Basis by Origination Year Prior | 0 | 26,129
Total, Revolving Loans | 0 | 0
Total, Revolving Converted to Term Loans | 0 | 0
Total loans | 318,800 | 421,142
Loans originated in current year, write offs | 0 | 0
Loans originated year prior, write offs | 0 | 0
Loans originated three years prior, write offs | 0 | 0
Loans originated four years prior, write offs | 0 | 0
Loans originated five years prior, write offs | 0 | 0
Total, Loans Amortized Cost Basis by Origination Year Prior, Write Offs | 0 | 4,221
Total, Revolving Loans Write Offs | 0 | 0
Total, Revolving Converted to Term Loans, Write Offs | 0 | 0
YTD gross write-offs | 0 | 4,221
Total loans | 318,800 | 421,142
Real Estate Construction Portfolio Segment [Member] | Pass [Member] |  |
Loans originated in current year | 22,562 | 29,550
Loans originated year prior | 55,835 | 131,984
Loans originated three years prior | 126,200 | 153,977
Loans originated four years prior | 57,546 | 19,461
Loans originated five years prior | 3,021 | 13,298
Total, Loans Amortized Cost Basis by Origination Year Prior | 0 | 3,131
Total, Revolving Loans | 0 | 0
Total, Revolving Converted to Term Loans | 0 | 0
Total loans | 265,164 | 351,401
Total loans | 265,164 | 351,401
Real Estate Construction Portfolio Segment [Member] | Special Mention [Member] |  |
Loans originated in current year | 0 | 1,911
Loans originated year prior | 0 | 0
Loans originated three years prior | 0 | 11,707
Loans originated four years prior | 35,569 | 25,389
Loans originated five years prior | 13,837 | 0
Total, Loans Amortized Cost Basis by Origination Year Prior | 0 | 22,998
Total, Revolving Loans | 0 | 0
Total, Revolving Converted to Term Loans | 0 | 0
Total loans | 49,406 | 62,005
Total loans | 49,406 | 62,005
Real Estate Construction Portfolio Segment [Member] | Substandard [Member] |  |
Loans originated in current year | 0 | 0
Loans originated year prior | 4,230 | 0
Loans originated three years prior | 0 | 0
Loans originated four years prior | 0 | 0
Loans originated five years prior | 0 | 7,736
Total, Loans Amortized Cost Basis by Origination Year Prior | 0 | 0
Total, Revolving Loans | 0 | 0
Total, Revolving Converted to Term Loans | 0 | 0
Total loans | 4,230 | 7,736
Total loans | 4,230 | 7,736
Commercial Real Estate Portfolio Segment [Member] |  |
Loans originated in current year | 1,472,030 | 2,159,093
Loans originated year prior | 2,006,936 | 1,990,019
Loans originated three years prior | 1,807,297 | 1,635,585
Loans originated four years prior | 1,502,515 | 893,972
Loans originated five years prior | 832,435 | 1,047,548
Total, Loans Amortized Cost Basis by Origination Year Prior | 2,206,768 | 1,809,430
Total, Revolving Loans | 198,485 | 185,985
Total, Revolving Converted to Term Loans | 0 | 0
Total loans | 10,026,466 | 9,721,632
Loans originated in current year, write offs | 0 | 0
Loans originated year prior, write offs | 0 | 0
Loans originated three years prior, write offs | 0 | 208
Loans originated four years prior, write offs | 0 | 0
Loans originated five years prior, write offs | 296 | 969
Total, Loans Amortized Cost Basis by Origination Year Prior, Write Offs | 4,173 | 4,164
Total, Revolving Loans Write Offs | 0 | 0
Total, Revolving Converted to Term Loans, Write Offs | 0 | 0
YTD gross write-offs | 4,469 | 5,341
Total loans | 10,026,466 | 9,721,632
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] |  |
Loans originated in current year | 1,463,225 | 2,121,489
Loans originated year prior | 1,987,280 | 1,959,239
Loans originated three years prior | 1,724,563 | 1,585,010
Loans originated four years prior | 1,428,124 | 887,508
Loans originated five years prior | 800,645 | 1,019,952
Total, Loans Amortized Cost Basis by Origination Year Prior | 2,108,143 | 1,726,015
Total, Revolving Loans | 180,394 | 184,601
Total, Revolving Converted to Term Loans | 0 | 0
Total loans | 9,692,374 | 9,483,814
Total loans | 9,692,374 | 9,483,814
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] |  |
Loans originated in current year | 8,805 | 37,604
Loans originated year prior | 8,292 | 18,910
Loans originated three years prior | 28,465 | 38,405
Loans originated four years prior | 16,462 | 3,499
Loans originated five years prior | 24,844 | 10,303
Total, Loans Amortized Cost Basis by Origination Year Prior | 19,888 | 17,210
Total, Revolving Loans | 9,939 | 1,384
Total, Revolving Converted to Term Loans | 0 | 0
Total loans | 116,695 | 127,315
Total loans | 116,695 | 127,315
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] |  |
Loans originated in current year | 0 | 0
Loans originated year prior | 11,364 | 11,870
Loans originated three years prior | 54,269 | 12,170
Loans originated four years prior | 57,929 | 2,965
Loans originated five years prior | 6,946 | 17,293
Total, Loans Amortized Cost Basis by Origination Year Prior | 78,737 | 66,205
Total, Revolving Loans | 8,152 | 0
Total, Revolving Converted to Term Loans | 0 | 0
Total loans | 217,397 | 110,503
Total loans | 217,397 | 110,503
Residential Portfolio Segment [Member] |  |
Loans originated in current year | 642,965 | 1,141,005
Loans originated year prior | 1,022,932 | 1,129,178
Loans originated three years prior | 1,019,204 | 905,938
Loans originated four years prior | 786,401 | 526,925
Loans originated five years prior | 456,847 | 542,339
Total, Loans Amortized Cost Basis by Origination Year Prior | 1,760,944 | 1,594,048
Total, Revolving Loans | 0 | 0
Total, Revolving Converted to Term Loans | 0 | 0
Total loans | 5,689,293 | 5,839,433
Loans originated in current year, write offs | 0 | 0
Loans originated year prior, write offs | 0 | 0
Loans originated three years prior, write offs | 0 | 0
Loans originated four years prior, write offs | 59 | 0
Loans originated five years prior, write offs | 0 | 0
Total, Loans Amortized Cost Basis by Origination Year Prior, Write Offs | 0 | 0
Total, Revolving Loans Write Offs | 0 | 0
Total, Revolving Converted to Term Loans, Write Offs | 0 | 0
YTD gross write-offs | 59 | 0
Total loans | 5,689,293 | 5,839,433
Residential Portfolio Segment [Member] | Pass [Member] |  |
Loans originated in current year | 642,568 | 1,140,998
Loans originated year prior | 1,020,419 | 1,128,526
Loans originated three years prior | 1,014,842 | 902,613
Loans originated four years prior | 781,218 | 524,315
Loans originated five years prior | 452,623 | 541,005
Total, Loans Amortized Cost Basis by Origination Year Prior | 1,745,923 | 1,583,118
Total, Revolving Loans | 0 | 0
Total, Revolving Converted to Term Loans | 0 | 0
Total loans | 5,657,593 | 5,820,575
Total loans | 5,657,593 | 5,820,575
Residential Portfolio Segment [Member] | Special Mention [Member] |  |
Loans originated in current year | 0 | 0
Loans originated year prior | 0 | 0
Loans originated three years prior | 0 | 0
Loans originated four years prior | 0 | 33
Loans originated five years prior | 33 | 0
Total, Loans Amortized Cost Basis by Origination Year Prior | 1,585 | 1,619
Total, Revolving Loans | 0 | 0
Total, Revolving Converted to Term Loans | 0 | 0
Total loans | 1,618 | 1,652
Total loans | 1,618 | 1,652
Residential Portfolio Segment [Member] | Substandard [Member] |  |
Loans originated in current year | 397 | 7
Loans originated year prior | 2,513 | 652
Loans originated three years prior | 4,362 | 3,325
Loans originated four years prior | 5,183 | 2,577
Loans originated five years prior | 4,191 | 1,334
Total, Loans Amortized Cost Basis by Origination Year Prior | 13,436 | 9,311
Total, Revolving Loans | 0 | 0
Total, Revolving Converted to Term Loans | 0 | 0
Total loans | 30,082 | 17,206
Total loans | 30,082 | 17,206
Equity Lines Portfolio Segment [Member] |  |
Loans originated in current year | 0 | 0
Loans originated year prior | 0 | 101
Loans originated three years prior | 72 | 0
Loans originated four years prior | 0 | 0
Loans originated five years prior | 0 | 0
Total, Loans Amortized Cost Basis by Origination Year Prior | 0 | 0
Total, Revolving Loans | 214,301 | 230,013
Total, Revolving Converted to Term Loans | 16,449 | 16,801
Total loans | 230,822 | 246,915
Loans originated in current year, write offs | 0 | 0
Loans originated year prior, write offs | 0 | 0
Loans originated three years prior, write offs | 0 | 0
Loans originated four years prior, write offs | 0 | 0
Loans originated five years prior, write offs | 0 | 0
Total, Loans Amortized Cost Basis by Origination Year Prior, Write Offs | 0 | 0
Total, Revolving Loans Write Offs | 3 | 0
Total, Revolving Converted to Term Loans, Write Offs | 0 | 0
YTD gross write-offs | 3 | 0
Total loans | 230,822 | 246,915
Equity Lines Portfolio Segment [Member] | Pass [Member] |  |
Loans originated in current year | 0 | 0
Loans originated year prior | 0 | 98
Loans originated three years prior | 72 | 0
Loans originated four years prior | 0 | 0
Loans originated five years prior | 0 | 0
Total, Loans Amortized Cost Basis by Origination Year Prior | 0 | 0
Total, Revolving Loans | 211,374 | 227,502
Total, Revolving Converted to Term Loans | 16,277 | 16,628
Total loans | 227,723 | 244,228
Total loans | 227,723 | 244,228
Equity Lines Portfolio Segment [Member] | Special Mention [Member] |  |
Loans originated in current year | 0 | 0
Loans originated year prior | 0 | 3
Loans originated three years prior | 0 | 0
Loans originated four years prior | 0 | 0
Loans originated five years prior | 0 | 0
Total, Loans Amortized Cost Basis by Origination Year Prior | 0 | 0
Total, Revolving Loans | 0 | 0
Total, Revolving Converted to Term Loans | 11 | 0
Total loans | 11 | 3
Total loans | 11 | 3
Equity Lines Portfolio Segment [Member] | Substandard [Member] |  |
Loans originated in current year | 0 | 0
Loans originated year prior | 0 | 0
Loans originated three years prior | 0 | 0
Loans originated four years prior | 0 | 0
Loans originated five years prior | 0 | 0
Total, Loans Amortized Cost Basis by Origination Year Prior | 0 | 0
Total, Revolving Loans | 2,927 | 2,511
Total, Revolving Converted to Term Loans | 161 | 173
Total loans | 3,088 | 2,684
Total loans | 3,088 | 2,684
Installment and Other Loans [Member ] |  |
Loans originated in current year | 5,264 | 5,114
Loans originated year prior | 0 | 981
Loans originated three years prior | 44 | 3
Loans originated four years prior | 0 | 0
Loans originated five years prior | 0 | 0
Total, Loans Amortized Cost Basis by Origination Year Prior | 0 | 0
Total, Revolving Loans | 0 | 0
Total, Revolving Converted to Term Loans | 0 | 0
Total loans | 5,308 | 6,098
Loans originated in current year, write offs | 0 | 0
Loans originated year prior, write offs | 0 | 15
Loans originated three years prior, write offs | 15 | 0
Loans originated four years prior, write offs | 0 | 0
Loans originated five years prior, write offs | 0 | 0
Total, Loans Amortized Cost Basis by Origination Year Prior, Write Offs | 0 | 0
Total, Revolving Loans Write Offs | 0 | 0
Total, Revolving Converted to Term Loans, Write Offs | 0 | 0
YTD gross write-offs | 15 | 15
Total loans | 5,308 | 6,098
Installment and Other Loans [Member ] | Pass [Member] |  |
Loans originated in current year | 5,264 | 5,114
Loans originated year prior | 0 | 981
Loans originated three years prior | 44 | 3
Loans originated four years prior | 0 | 0
Loans originated five years prior | 0 | 0
Total, Loans Amortized Cost Basis by Origination Year Prior | 0 | 0
Total, Revolving Loans | 0 | 0
Total, Revolving Converted to Term Loans | 0 | 0
Total loans | 5,308 | 6,098
Total loans | $ 5,308 | $ 6,098

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