v3.26.1
Note 5 - 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, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Originated current year $ 2,017,693   $ 2,017,693   $ 3,411,331
Originated prior year 3,289,381   3,289,381   2,146,605
Originated two years prior 1,892,523   1,892,523   2,947,859
Originated three years prior 2,676,447   2,676,447   2,725,330
Originated four years prior 2,521,467   2,521,467   2,297,334
Originated years prior 5,697,454   5,697,454   4,255,068
Revolving 2,487,583   2,487,583   2,323,975
Converted to Term 24,178   24,178   24,797
Loans 20,606,726   20,606,726   20,132,299
Current year, write offs     0   0
Prior year, write offs     74   249
Two years prior, write offs     2,204   715
Three years prior, write offs     152   2,752
Four years prior, write offs     2,204   5,399
Years prior, write offs     4,158   16,135
Revolving, write offs     3,307   12,487
Converted to term, write offs     0   0
Loans, write offs 2,743 $ 13,030 12,099 $ 15,374 37,737
Doubtful 20,606,726   20,606,726   20,132,299
Commercial Portfolio Segment [Member]          
Originated current year 309,213   309,213   400,479
Originated prior year 423,805   423,805   226,310
Originated two years prior 176,259   176,259   237,136
Originated three years prior 198,621   198,621   160,611
Originated four years prior 154,291   154,291   165,594
Originated years prior 229,437   229,437   100,473
Revolving 2,021,499   2,021,499   1,881,850
Converted to Term 8,639   8,639   7,300
Loans 3,521,764   3,521,764   3,179,753
Current year, write offs     0   0
Prior year, write offs     74   175
Two years prior, write offs     2,204   715
Three years prior, write offs     135   2,752
Four years prior, write offs     2,204   4,469
Years prior, write offs     2,790   12,503
Revolving, write offs     3,307   12,487
Converted to term, write offs     0   0
Loans, write offs 2,743 9,117 10,714 11,461 33,101
Doubtful 3,521,764   3,521,764   3,179,753
Commercial Portfolio Segment [Member] | Pass [Member]          
Originated current year 309,213   309,213   384,065
Originated prior year 410,188   410,188   190,685
Originated two years prior 172,065   172,065   220,174
Originated three years prior 182,667   182,667   154,865
Originated four years prior 151,207   151,207   157,979
Originated years prior 210,225   210,225   85,858
Revolving 1,954,950   1,954,950   1,702,322
Converted to Term 7,034   7,034   6,269
Loans 3,397,549   3,397,549   2,902,217
Doubtful 3,397,549   3,397,549   2,902,217
Commercial Portfolio Segment [Member] | Special Mention [Member]          
Originated current year 0   0   0
Originated prior year 0   0   33,459
Originated two years prior 4,194   4,194   0
Originated three years prior 2,028   2,028   1,462
Originated four years prior 1,177   1,177   5,000
Originated years prior 3,687   3,687   3,875
Revolving 27,716   27,716   117,738
Converted to Term 0   0   0
Loans 38,802   38,802   161,534
Doubtful 38,802   38,802   161,534
Commercial Portfolio Segment [Member] | Substandard [Member]          
Originated current year 0   0   16,414
Originated prior year 13,617   13,617   2,166
Originated two years prior 0   0   16,962
Originated three years prior 13,926   13,926   2,479
Originated four years prior 1,907   1,907   2,615
Originated years prior 15,525   15,525   10,443
Revolving 38,833   38,833   61,790
Converted to Term 1,605   1,605   1,031
Loans 85,413   85,413   113,900
Doubtful 85,413   85,413   113,900
Commercial Portfolio Segment [Member] | Doubtful [Member]          
Originated current year 0   0   0
Originated prior year 0   0   0
Originated two years prior 0   0   0
Originated three years prior 0   0   1,805
Originated four years prior 0   0   0
Originated years prior 17,843   17,843   297
Revolving 0   0   0
Converted to Term 0   0   0
Loans 17,843   17,843   2,102
Doubtful 17,843   17,843   2,102
Real Estate Construction Portfolio Segment [Member]          
Originated current year 30,084   30,084   86,893
Originated prior year 82,982   82,982   69,113
Originated two years prior 52,947   52,947   47,036
Originated three years prior 48,173   48,173   68,635
Originated four years prior 0   0   56,343
Originated years prior 29,970   29,970   6,636
Revolving 2,034   2,034   1,298
Converted to Term 0   0   0
Loans 246,190   246,190   335,954
Current year, write offs     0   0
Prior year, write offs     0   0
Two years prior, write offs     0   0
Three years prior, write offs     0   0
Four years prior, write offs     0   0
Years prior, write offs     0   0
Revolving, write offs     0   0
Converted to term, write offs     0   0
Loans, write offs (0) (0) 0 (0) 0
Doubtful 246,190   246,190   335,954
Real Estate Construction Portfolio Segment [Member] | Pass [Member]          
Originated current year 30,084   30,084   86,893
Originated prior year 82,982   82,982   69,113
Originated two years prior 52,947   52,947   37,801
Originated three years prior 32,918   32,918   68,635
Originated four years prior 0   0   30,283
Originated years prior 24,531   24,531   0
Revolving 2,034   2,034   1,298
Converted to Term 0   0   0
Loans 225,496   225,496   294,023
Doubtful 225,496   225,496   294,023
Real Estate Construction Portfolio Segment [Member] | Special Mention [Member]          
Originated current year 0   0   0
Originated prior year 0   0   0
Originated two years prior 0   0   9,235
Originated three years prior 2,816   2,816   0
Originated four years prior 0   0   0
Originated years prior 0   0   0
Revolving 0   0   0
Converted to Term 0   0   0
Loans 2,816   2,816   9,235
Doubtful 2,816   2,816   9,235
Real Estate Construction Portfolio Segment [Member] | Substandard [Member]          
Originated current year 0   0   0
Originated prior year 0   0   0
Originated two years prior 0   0   0
Originated three years prior 12,439   12,439   0
Originated four years prior 0   0   26,060
Originated years prior 5,439   5,439   6,636
Revolving 0   0   0
Converted to Term 0   0   0
Loans 17,878   17,878   32,696
Doubtful 17,878   17,878   32,696
Commercial Real Estate Portfolio Segment [Member]          
Originated current year 1,158,841   1,158,841   1,941,874
Originated prior year 1,897,348   1,897,348   1,360,416
Originated two years prior 1,253,827   1,253,827   1,758,888
Originated three years prior 1,606,175   1,606,175   1,582,709
Originated four years prior 1,509,073   1,509,073   1,382,164
Originated years prior 3,101,814   3,101,814   2,298,683
Revolving 244,155   244,155   230,077
Converted to Term 633   633   1,208
Loans 10,771,866   10,771,866   10,556,019
Current year, write offs     0   0
Prior year, write offs     0   0
Two years prior, write offs     0   0
Three years prior, write offs     0   0
Four years prior, write offs     0   930
Years prior, write offs     1,368   3,632
Revolving, write offs     0   0
Converted to term, write offs     0   0
Loans, write offs (0) 3,839 1,368 3,839 4,562
Doubtful 10,771,866   10,771,866   10,556,019
Commercial Real Estate Portfolio Segment [Member] | Pass [Member]          
Originated current year 1,114,608   1,114,608   1,909,540
Originated prior year 1,882,984   1,882,984   1,286,856
Originated two years prior 1,184,402   1,184,402   1,673,226
Originated three years prior 1,500,356   1,500,356   1,442,872
Originated four years prior 1,343,636   1,343,636   1,290,175
Originated years prior 2,915,846   2,915,846   2,184,774
Revolving 219,910   219,910   206,139
Converted to Term 633   633   0
Loans 10,162,375   10,162,375   9,993,582
Doubtful 10,162,375   10,162,375   9,993,582
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member]          
Originated current year 32,721   32,721   29,745
Originated prior year 9,761   9,761   58,491
Originated two years prior 39,920   39,920   74,142
Originated three years prior 81,773   81,773   113,065
Originated four years prior 122,123   122,123   32,074
Originated years prior 41,310   41,310   33,062
Revolving 6,662   6,662   22,214
Converted to Term 0   0   0
Loans 334,270   334,270   362,793
Doubtful 334,270   334,270   362,793
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]          
Originated current year 11,512   11,512   2,589
Originated prior year 4,603   4,603   15,069
Originated two years prior 29,505   29,505   11,520
Originated three years prior 24,046   24,046   26,772
Originated four years prior 43,314   43,314   59,915
Originated years prior 126,815   126,815   63,004
Revolving 17,583   17,583   1,724
Converted to Term 0   0   1,208
Loans 257,378   257,378   181,801
Doubtful 257,378   257,378   181,801
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member]          
Originated current year         0
Originated prior year         0
Originated two years prior         0
Originated three years prior         0
Originated four years prior         0
Originated years prior         17,843
Revolving         0
Converted to Term         0
Loans         17,843
Doubtful         17,843
Residential Portfolio Segment [Member]          
Originated current year 518,046   518,046   980,450
Originated prior year 884,551   884,551   490,658
Originated two years prior 409,490   409,490   904,799
Originated three years prior 823,478   823,478   913,304
Originated four years prior 858,045   858,045   693,233
Originated years prior 2,336,233   2,336,233   1,849,276
Revolving 0   0   0
Converted to Term 0   0   0
Loans 5,829,843   5,829,843   5,831,720
Current year, write offs     0   0
Prior year, write offs     0   74
Two years prior, write offs     0   0
Three years prior, write offs     17   0
Four years prior, write offs     0   0
Years prior, write offs     0   0
Revolving, write offs     0   0
Converted to term, write offs     0   0
Loans, write offs     17   74
Doubtful 5,829,843   5,829,843   5,831,720
Residential Portfolio Segment [Member] | Pass [Member]          
Originated current year 518,046   518,046   980,403
Originated prior year 883,037   883,037   488,518
Originated two years prior 407,022   407,022   899,547
Originated three years prior 819,220   819,220   905,719
Originated four years prior 849,250   849,250   688,469
Originated years prior 2,311,828   2,311,828   1,826,904
Revolving 0   0   0
Converted to Term 0   0   0
Loans 5,788,403   5,788,403   5,789,560
Doubtful 5,788,403   5,788,403   5,789,560
Residential Portfolio Segment [Member] | Special Mention [Member]          
Originated current year 0   0   0
Originated prior year 0   0   0
Originated two years prior 0   0   0
Originated three years prior 0   0   0
Originated four years prior 0   0   0
Originated years prior 1,547   1,547   1,571
Revolving 0   0   0
Converted to Term 0   0   0
Loans 1,547   1,547   1,571
Doubtful 1,547   1,547   1,571
Residential Portfolio Segment [Member] | Substandard [Member]          
Originated current year 0   0   47
Originated prior year 1,514   1,514   2,140
Originated two years prior 2,468   2,468   5,252
Originated three years prior 4,258   4,258   7,585
Originated four years prior 8,795   8,795   4,764
Originated years prior 22,858   22,858   20,801
Revolving 0   0   0
Converted to Term 0   0   0
Loans 39,893   39,893   40,589
Doubtful 39,893   39,893   40,589
Equity Lines Portfolio Segment [Member]          
Originated current year 0   0   0
Originated prior year 0   0   0
Originated two years prior 0   0   0
Originated three years prior 0   0   0
Originated four years prior 0   0   0
Originated years prior 0   0   0
Revolving 219,895   219,895   210,750
Converted to Term 14,906   14,906   16,289
Loans 234,801   234,801   227,039
Current year, write offs     0   0
Prior year, write offs     0   0
Two years prior, write offs     0   0
Three years prior, write offs     0   0
Four years prior, write offs     0   0
Years prior, write offs     0   0
Revolving, write offs     0   0
Converted to term, write offs     0   0
Loans, write offs     0   0
Doubtful 234,801   234,801   227,039
Equity Lines Portfolio Segment [Member] | Pass [Member]          
Originated current year 0   0   0
Originated prior year 0   0   0
Originated two years prior 0   0   0
Originated three years prior 0   0   0
Originated four years prior 0   0   0
Originated years prior 0   0   0
Revolving 218,057   218,057   209,256
Converted to Term 14,820   14,820   15,853
Loans 232,877   232,877   225,109
Doubtful 232,877   232,877   225,109
Equity Lines Portfolio Segment [Member] | Substandard [Member]          
Originated current year 0   0   0
Originated prior year 0   0   0
Originated two years prior 0   0   0
Originated three years prior 0   0   0
Originated four years prior 0   0   0
Originated years prior 0   0   0
Revolving 1,838   1,838   1,494
Converted to Term 86   86   436
Loans 1,924   1,924   1,930
Doubtful 1,924   1,924   1,930
Installment and Other Loans [Member ]          
Originated current year 1,509   1,509   1,635
Originated prior year 695   695   108
Originated two years prior 0   0   0
Originated three years prior 0   0   71
Originated four years prior 58   58   0
Originated years prior 0   0   0
Revolving 0   0   0
Converted to Term 0   0   0
Loans 2,262   2,262   1,814
Current year, write offs     0   0
Prior year, write offs     0   0
Two years prior, write offs     0   0
Three years prior, write offs     0   0
Four years prior, write offs     0   0
Years prior, write offs     0   0
Revolving, write offs     0   0
Converted to term, write offs     0   0
Loans, write offs (0) $ (0) 0 $ (0) 0
Doubtful 2,262   2,262   1,814
Installment and Other Loans [Member ] | Pass [Member]          
Originated current year 1,509   1,509   1,635
Originated prior year 695   695   108
Originated two years prior 0   0   0
Originated three years prior 0   0   71
Originated four years prior 58   58   0
Originated years prior 0   0   0
Revolving 0   0   0
Converted to Term 0   0   0
Loans 2,262   2,262   1,814
Doubtful $ 2,262   $ 2,262   $ 1,814