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Note 8 - Loans - Loan Held for Investment by Loan Portfolio Segments, Internal Risk Ratings and Vintage Year (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Loans originated in current year | $ 1,314,808 |  | $ 1,314,808 |  | $ 3,724,618
Loans originated year prior | 3,603,192 |  | 3,603,192 |  | 3,581,730
Loans originated three years prior | 3,368,888 |  | 3,368,888 |  | 3,052,314
Loans originated four years prior | 2,821,927 |  | 2,821,927 |  | 1,588,314
Loans originated five years prior | 1,451,353 |  | 1,451,353 |  | 1,686,965
Total, Loans Amortized Cost Basis by Origination Year Prior | 4,663,971 |  | 4,663,971 |  | 3,571,544
Total, Revolving Loans | 2,097,131 |  | 2,097,131 |  | 2,306,710
Total, Revolving Converted to Term Loans | 25,469 |  | 25,469 |  | 25,225
Total loans | 19,346,739 |  | 19,346,739 |  | 19,537,420
Loans originated in current year, write offs |  |  | 0 |  | 0
Loans originated year prior, write offs |  |  | 401 |  | 992
Loans originated three years prior, write offs |  |  | 441 |  | 1,520
Loans originated four years prior, write offs |  |  | 8,096 |  | 384
Loans originated five years prior, write offs |  |  | 148 |  | 4,641
Total, Loans Amortized Cost Basis by Origination Year Prior, Write Offs |  |  | 291 |  | 14,429
Total, Revolving Loans Write Offs |  |  | 1,070 |  | 1,520
Total, Revolving Converted to Term Loans, Write Offs |  |  | 3 |  | 0
YTD gross write-offs | 8,257 | $ 2,483 | 10,450 | $ 10,390 | 23,486
Total loans | 19,346,739 |  | 19,346,739 |  | 19,537,420
Commercial Portfolio Segment [Member] |  |  |  |  |
Loans originated in current year | 283,559 |  | 283,559 |  | 387,945
Loans originated year prior | 337,756 |  | 337,756 |  | 329,467
Loans originated three years prior | 260,108 |  | 260,108 |  | 345,104
Loans originated four years prior | 276,562 |  | 276,562 |  | 122,567
Loans originated five years prior | 79,235 |  | 79,235 |  | 76,044
Total, Loans Amortized Cost Basis by Origination Year Prior | 135,448 |  | 135,448 |  | 141,937
Total, Revolving Loans | 1,705,371 |  | 1,705,371 |  | 1,890,712
Total, Revolving Converted to Term Loans | 8,856 |  | 8,856 |  | 8,424
Total loans | 3,086,895 |  | 3,086,895 |  | 3,302,200
Loans originated in current year, write offs |  |  | 0 |  | 0
Loans originated year prior, write offs |  |  | 401 |  | 977
Loans originated three years prior, write offs |  |  | 441 |  | 1,312
Loans originated four years prior, write offs |  |  | 8,096 |  | 384
Loans originated five years prior, write offs |  |  | 148 |  | 3,672
Total, Loans Amortized Cost Basis by Origination Year Prior, Write Offs |  |  | 40 |  | 6,044
Total, Revolving Loans Write Offs |  |  | 1,070 |  | 1,520
Total, Revolving Converted to Term Loans, Write Offs |  |  | 0 |  | 0
YTD gross write-offs | 8,257 | 2,352 | 10,196 | 6,263 | 13,909
Total loans | 3,086,895 |  | 3,086,895 |  | 3,302,200
Commercial Portfolio Segment [Member] | Pass [Member] |  |  |  |  |
Loans originated in current year | 282,985 |  | 282,985 |  | 381,705
Loans originated year prior | 331,024 |  | 331,024 |  | 323,939
Loans originated three years prior | 242,031 |  | 242,031 |  | 326,650
Loans originated four years prior | 262,156 |  | 262,156 |  | 96,725
Loans originated five years prior | 57,262 |  | 57,262 |  | 75,281
Total, Loans Amortized Cost Basis by Origination Year Prior | 120,683 |  | 120,683 |  | 136,162
Total, Revolving Loans | 1,609,154 |  | 1,609,154 |  | 1,775,162
Total, Revolving Converted to Term Loans | 8,483 |  | 8,483 |  | 8,308
Total loans | 2,913,778 |  | 2,913,778 |  | 3,123,932
Total loans | 2,913,778 |  | 2,913,778 |  | 3,123,932
Commercial Portfolio Segment [Member] | Special Mention [Member] |  |  |  |  |
Loans originated in current year | 420 |  | 420 |  | 4,488
Loans originated year prior | 246 |  | 246 |  | 4,875
Loans originated three years prior | 2,749 |  | 2,749 |  | 8,559
Loans originated four years prior | 14,406 |  | 14,406 |  | 23,380
Loans originated five years prior | 21,973 |  | 21,973 |  | 0
Total, Loans Amortized Cost Basis by Origination Year Prior | 8,359 |  | 8,359 |  | 0
Total, Revolving Loans | 32,118 |  | 32,118 |  | 75,419
Total, Revolving Converted to Term Loans | 0 |  | 0 |  | 0
Total loans | 80,271 |  | 80,271 |  | 116,721
Total loans | 80,271 |  | 80,271 |  | 116,721
Commercial Portfolio Segment [Member] | Substandard [Member] |  |  |  |  |
Loans originated in current year | 154 |  | 154 |  | 1,752
Loans originated year prior | 6,486 |  | 6,486 |  | 653
Loans originated three years prior | 15,328 |  | 15,328 |  | 9,895
Loans originated four years prior | 0 |  | 0 |  | 2,462
Loans originated five years prior | 0 |  | 0 |  | 763
Total, Loans Amortized Cost Basis by Origination Year Prior | 6,406 |  | 6,406 |  | 5,775
Total, Revolving Loans | 64,099 |  | 64,099 |  | 40,131
Total, Revolving Converted to Term Loans | 373 |  | 373 |  | 116
Total loans | 92,846 |  | 92,846 |  | 61,547
Total loans | 92,846 |  | 92,846 |  | 61,547
Real Estate Construction Portfolio Segment [Member] |  |  |  |  |
Loans originated in current year | 1,066 |  | 1,066 |  | 31,461
Loans originated year prior | 47,101 |  | 47,101 |  | 131,984
Loans originated three years prior | 136,198 |  | 136,198 |  | 165,684
Loans originated four years prior | 108,623 |  | 108,623 |  | 44,850
Loans originated five years prior | 26,561 |  | 26,561 |  | 21,034
Total, Loans Amortized Cost Basis by Origination Year Prior | 36,618 |  | 36,618 |  | 26,129
Total, Revolving Loans | 0 |  | 0 |  | 0
Total, Revolving Converted to Term Loans | 0 |  | 0 |  | 0
Total loans | 356,167 |  | 356,167 |  | 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) | (0) | 0 | (0) | 4,221
Total loans | 356,167 |  | 356,167 |  | 421,142
Real Estate Construction Portfolio Segment [Member] | Pass [Member] |  |  |  |  |
Loans originated in current year | 1,066 |  | 1,066 |  | 29,550
Loans originated year prior | 43,592 |  | 43,592 |  | 131,984
Loans originated three years prior | 136,198 |  | 136,198 |  | 153,977
Loans originated four years prior | 77,477 |  | 77,477 |  | 19,461
Loans originated five years prior | 2,564 |  | 2,564 |  | 13,298
Total, Loans Amortized Cost Basis by Origination Year Prior | 13,620 |  | 13,620 |  | 3,131
Total, Revolving Loans | 0 |  | 0 |  | 0
Total, Revolving Converted to Term Loans | 0 |  | 0 |  | 0
Total loans | 274,517 |  | 274,517 |  | 351,401
Total loans | 274,517 |  | 274,517 |  | 351,401
Real Estate Construction Portfolio Segment [Member] | Special Mention [Member] |  |  |  |  |
Loans originated in current year | 0 |  | 0 |  | 1,911
Loans originated year prior | 3,509 |  | 3,509 |  | 0
Loans originated three years prior | 0 |  | 0 |  | 11,707
Loans originated four years prior | 31,146 |  | 31,146 |  | 25,389
Loans originated five years prior | 23,997 |  | 23,997 |  | 0
Total, Loans Amortized Cost Basis by Origination Year Prior | 0 |  | 0 |  | 22,998
Total, Revolving Loans | 0 |  | 0 |  | 0
Total, Revolving Converted to Term Loans | 0 |  | 0 |  | 0
Total loans | 58,652 |  | 58,652 |  | 62,005
Total loans | 58,652 |  | 58,652 |  | 62,005
Real Estate Construction Portfolio Segment [Member] | Substandard [Member] |  |  |  |  |
Loans originated in current year | 0 |  | 0 |  | 0
Loans originated year prior | 0 |  | 0 |  | 0
Loans originated three years prior | 0 |  | 0 |  | 0
Loans originated four years prior | 0 |  | 0 |  | 0
Loans originated five years prior | 0 |  | 0 |  | 7,736
Total, Loans Amortized Cost Basis by Origination Year Prior | 22,998 |  | 22,998 |  | 0
Total, Revolving Loans | 0 |  | 0 |  | 0
Total, Revolving Converted to Term Loans | 0 |  | 0 |  | 0
Total loans | 22,998 |  | 22,998 |  | 7,736
Total loans | 22,998 |  | 22,998 |  | 7,736
Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |
Loans originated in current year | 686,111 |  | 686,111 |  | 2,159,093
Loans originated year prior | 2,143,019 |  | 2,143,019 |  | 1,990,019
Loans originated three years prior | 1,896,982 |  | 1,896,982 |  | 1,635,585
Loans originated four years prior | 1,584,768 |  | 1,584,768 |  | 893,972
Loans originated five years prior | 853,940 |  | 853,940 |  | 1,047,548
Total, Loans Amortized Cost Basis by Origination Year Prior | 2,541,564 |  | 2,541,564 |  | 1,809,430
Total, Revolving Loans | 172,267 |  | 172,267 |  | 185,985
Total, Revolving Converted to Term Loans | 0 |  | 0 |  | 0
Total loans | 9,878,651 |  | 9,878,651 |  | 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 |  |  | 0 |  | 969
Total, Loans Amortized Cost Basis by Origination Year Prior, Write Offs |  |  | 251 |  | 4,164
Total, Revolving Loans Write Offs |  |  | 0 |  | 0
Total, Revolving Converted to Term Loans, Write Offs |  |  | 0 |  | 0
YTD gross write-offs | (0) | 130 | 251 | 4,120 | 5,341
Total loans | 9,878,651 |  | 9,878,651 |  | 9,721,632
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] |  |  |  |  |
Loans originated in current year | 686,111 |  | 686,111 |  | 2,121,489
Loans originated year prior | 2,120,624 |  | 2,120,624 |  | 1,959,239
Loans originated three years prior | 1,851,089 |  | 1,851,089 |  | 1,585,010
Loans originated four years prior | 1,529,293 |  | 1,529,293 |  | 887,508
Loans originated five years prior | 847,101 |  | 847,101 |  | 1,019,952
Total, Loans Amortized Cost Basis by Origination Year Prior | 2,433,709 |  | 2,433,709 |  | 1,726,015
Total, Revolving Loans | 168,127 |  | 168,127 |  | 184,601
Total, Revolving Converted to Term Loans | 0 |  | 0 |  | 0
Total loans | 9,636,054 |  | 9,636,054 |  | 9,483,814
Total loans | 9,636,054 |  | 9,636,054 |  | 9,483,814
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] |  |  |  |  |
Loans originated in current year | 0 |  | 0 |  | 37,604
Loans originated year prior | 11,210 |  | 11,210 |  | 18,910
Loans originated three years prior | 15,500 |  | 15,500 |  | 38,405
Loans originated four years prior | 9,249 |  | 9,249 |  | 3,499
Loans originated five years prior | 1,847 |  | 1,847 |  | 10,303
Total, Loans Amortized Cost Basis by Origination Year Prior | 21,528 |  | 21,528 |  | 17,210
Total, Revolving Loans | 2,099 |  | 2,099 |  | 1,384
Total, Revolving Converted to Term Loans | 0 |  | 0 |  | 0
Total loans | 61,433 |  | 61,433 |  | 127,315
Total loans | 61,433 |  | 61,433 |  | 127,315
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] |  |  |  |  |
Loans originated in current year | 0 |  | 0 |  | 0
Loans originated year prior | 11,185 |  | 11,185 |  | 11,870
Loans originated three years prior | 30,393 |  | 30,393 |  | 12,170
Loans originated four years prior | 46,226 |  | 46,226 |  | 2,965
Loans originated five years prior | 4,992 |  | 4,992 |  | 17,293
Total, Loans Amortized Cost Basis by Origination Year Prior | 86,327 |  | 86,327 |  | 66,205
Total, Revolving Loans | 2,041 |  | 2,041 |  | 0
Total, Revolving Converted to Term Loans | 0 |  | 0 |  | 0
Total loans | 181,164 |  | 181,164 |  | 110,503
Total loans | 181,164 |  | 181,164 |  | 110,503
Residential Portfolio Segment [Member] |  |  |  |  |
Loans originated in current year | 342,901 |  | 342,901 |  | 1,141,005
Loans originated year prior | 1,070,468 |  | 1,070,468 |  | 1,129,178
Loans originated three years prior | 1,075,344 |  | 1,075,344 |  | 905,938
Loans originated four years prior | 851,973 |  | 851,973 |  | 526,925
Loans originated five years prior | 491,617 |  | 491,617 |  | 542,339
Total, Loans Amortized Cost Basis by Origination Year Prior | 1,950,341 |  | 1,950,341 |  | 1,594,048
Total, Revolving Loans | 0 |  | 0 |  | 0
Total, Revolving Converted to Term Loans | 0 |  | 0 |  | 0
Total loans | 5,782,644 |  | 5,782,644 |  | 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 |  |  | 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 |  |  | 0 |  | 0
Total loans | 5,782,644 |  | 5,782,644 |  | 5,839,433
Residential Portfolio Segment [Member] | Pass [Member] |  |  |  |  |
Loans originated in current year | 342,901 |  | 342,901 |  | 1,140,998
Loans originated year prior | 1,069,894 |  | 1,069,894 |  | 1,128,526
Loans originated three years prior | 1,072,956 |  | 1,072,956 |  | 902,613
Loans originated four years prior | 848,067 |  | 848,067 |  | 524,315
Loans originated five years prior | 486,990 |  | 486,990 |  | 541,005
Total, Loans Amortized Cost Basis by Origination Year Prior | 1,935,373 |  | 1,935,373 |  | 1,583,118
Total, Revolving Loans | 0 |  | 0 |  | 0
Total, Revolving Converted to Term Loans | 0 |  | 0 |  | 0
Total loans | 5,756,181 |  | 5,756,181 |  | 5,820,575
Total loans | 5,756,181 |  | 5,756,181 |  | 5,820,575
Residential Portfolio Segment [Member] | Special Mention [Member] |  |  |  |  |
Loans originated in current year | 0 |  | 0 |  | 0
Loans originated year prior | 0 |  | 0 |  | 0
Loans originated three years prior | 0 |  | 0 |  | 0
Loans originated four years prior | 0 |  | 0 |  | 33
Loans originated five years prior | 33 |  | 33 |  | 0
Total, Loans Amortized Cost Basis by Origination Year Prior | 1,598 |  | 1,598 |  | 1,619
Total, Revolving Loans | 0 |  | 0 |  | 0
Total, Revolving Converted to Term Loans | 0 |  | 0 |  | 0
Total loans | 1,631 |  | 1,631 |  | 1,652
Total loans | 1,631 |  | 1,631 |  | 1,652
Residential Portfolio Segment [Member] | Substandard [Member] |  |  |  |  |
Loans originated in current year | 0 |  | 0 |  | 7
Loans originated year prior | 574 |  | 574 |  | 652
Loans originated three years prior | 2,388 |  | 2,388 |  | 3,325
Loans originated four years prior | 3,906 |  | 3,906 |  | 2,577
Loans originated five years prior | 4,594 |  | 4,594 |  | 1,334
Total, Loans Amortized Cost Basis by Origination Year Prior | 13,370 |  | 13,370 |  | 9,311
Total, Revolving Loans | 0 |  | 0 |  | 0
Total, Revolving Converted to Term Loans | 0 |  | 0 |  | 0
Total loans | 24,832 |  | 24,832 |  | 17,206
Total loans | 24,832 |  | 24,832 |  | 17,206
Equity Lines Portfolio Segment [Member] |  |  |  |  |
Loans originated in current year | 0 |  | 0 |  | 0
Loans originated year prior | 0 |  | 0 |  | 101
Loans originated three years prior | 87 |  | 87 |  | 0
Loans originated four years prior | 0 |  | 0 |  | 0
Loans originated five years prior | 0 |  | 0 |  | 0
Total, Loans Amortized Cost Basis by Origination Year Prior | 0 |  | 0 |  | 0
Total, Revolving Loans | 219,493 |  | 219,493 |  | 230,013
Total, Revolving Converted to Term Loans | 16,613 |  | 16,613 |  | 16,801
Total loans | 236,193 |  | 236,193 |  | 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 |  |  | 0 |  | 0
Total, Revolving Converted to Term Loans, Write Offs |  |  | 3 |  | 0
YTD gross write-offs |  |  | 3 |  | 0
Total loans | 236,193 |  | 236,193 |  | 246,915
Equity Lines Portfolio Segment [Member] | Pass [Member] |  |  |  |  |
Loans originated in current year | 0 |  | 0 |  | 0
Loans originated year prior | 0 |  | 0 |  | 98
Loans originated three years prior | 87 |  | 87 |  | 0
Loans originated four years prior | 0 |  | 0 |  | 0
Loans originated five years prior | 0 |  | 0 |  | 0
Total, Loans Amortized Cost Basis by Origination Year Prior | 0 |  | 0 |  | 0
Total, Revolving Loans | 217,511 |  | 217,511 |  | 227,502
Total, Revolving Converted to Term Loans | 16,280 |  | 16,280 |  | 16,628
Total loans | 233,878 |  | 233,878 |  | 244,228
Total loans | 233,878 |  | 233,878 |  | 244,228
Equity Lines Portfolio Segment [Member] | Special Mention [Member] |  |  |  |  |
Loans originated in current year |  |  |  |  | 0
Loans originated year prior |  |  |  |  | 3
Loans originated three years prior |  |  |  |  | 0
Loans originated four years prior |  |  |  |  | 0
Loans originated five years prior |  |  |  |  | 0
Total, Loans Amortized Cost Basis by Origination Year Prior |  |  |  |  | 0
Total, Revolving Loans |  |  |  |  | 0
Total, Revolving Converted to Term Loans |  |  |  |  | 0
Total loans |  |  |  |  | 3
Total loans |  |  |  |  | 3
Equity Lines Portfolio Segment [Member] | Substandard [Member] |  |  |  |  |
Loans originated in current year | 0 |  | 0 |  | 0
Loans originated year prior | 0 |  | 0 |  | 0
Loans originated three years prior | 0 |  | 0 |  | 0
Loans originated four years prior | 0 |  | 0 |  | 0
Loans originated five years prior | 0 |  | 0 |  | 0
Total, Loans Amortized Cost Basis by Origination Year Prior | 0 |  | 0 |  | 0
Total, Revolving Loans | 1,982 |  | 1,982 |  | 2,511
Total, Revolving Converted to Term Loans | 333 |  | 333 |  | 173
Total loans | 2,315 |  | 2,315 |  | 2,684
Total loans | 2,315 |  | 2,315 |  | 2,684
Installment and Other Loans [Member ] |  |  |  |  |
Loans originated in current year | 1,171 |  | 1,171 |  | 5,114
Loans originated year prior | 4,848 |  | 4,848 |  | 981
Loans originated three years prior | 169 |  | 169 |  | 3
Loans originated four years prior | 1 |  | 1 |  | 0
Loans originated five years prior | 0 |  | 0 |  | 0
Total, Loans Amortized Cost Basis by Origination Year Prior | 0 |  | 0 |  | 0
Total, Revolving Loans | 0 |  | 0 |  | 0
Total, Revolving Converted to Term Loans | 0 |  | 0 |  | 0
Total loans | 6,189 |  | 6,189 |  | 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 |  |  | 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 |  |  | 0 |  | 0
Total, Revolving Converted to Term Loans, Write Offs |  |  | 0 |  | 0
YTD gross write-offs | (0) | $ 1 | 0 | $ 7 | 15
Total loans | 6,189 |  | 6,189 |  | 6,098
Installment and Other Loans [Member ] | Pass [Member] |  |  |  |  |
Loans originated in current year | 1,171 |  | 1,171 |  | 5,114
Loans originated year prior | 4,848 |  | 4,848 |  | 981
Loans originated three years prior | 169 |  | 169 |  | 3
Loans originated four years prior | 1 |  | 1 |  | 0
Loans originated five years prior | 0 |  | 0 |  | 0
Total, Loans Amortized Cost Basis by Origination Year Prior | 0 |  | 0 |  | 0
Total, Revolving Loans | 0 |  | 0 |  | 0
Total, Revolving Converted to Term Loans | 0 |  | 0 |  | 0
Total loans | 6,189 |  | 6,189 |  | 6,098
Total loans | $ 6,189 |  | $ 6,189 |  | $ 6,098

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