v3.26.3
Note 7 - Loans and the Allowance for Credit Losses - Loans by Origination and Risk Designation (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Originated Current Fiscal Year   $ 1,507,055   $ 1,442,449
Originated One Year Prior   1,389,927   762,181
Originated Two Years Prior   657,200   513,243
Originated Three Years Prior   380,648   1,989,079
Originated Four Years Prior   1,711,205   1,763,604
Originated Five or More Years Prior   3,199,099   2,395,879
Revolving Loans   2,590,509   2,591,123
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process   11,435,643   11,457,558
Gross write-off, current year   0   25
Gross write-off, one year prior   146   0
Gross write-off, two years prior   44   32
Gross write-off, three years prior   765   1,669
Gross write-off, four years prior   16,394   0
Gross write-off, five years prior   35,938   14,693
Gross write-off, revolving   757   2,962
Gross write-off $ 5,173 54,044 $ 13,767 19,381
Pass [Member]        
Originated Current Fiscal Year   1,501,140   1,442,303
Originated One Year Prior   1,389,927   757,618
Originated Two Years Prior   650,875   510,195
Originated Three Years Prior   376,413   1,923,801
Originated Four Years Prior   1,671,038   1,747,400
Originated Five or More Years Prior   3,087,158   2,253,581
Revolving Loans   2,533,316   2,537,941
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process   11,209,867   11,172,839
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   3,007   39,965
Originated Four Years Prior   29,182   3,741
Originated Five or More Years Prior   36,445   74,379
Revolving Loans   20,979   10,385
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process   89,613   128,470
Substandard [Member]        
Originated Current Fiscal Year   5,915   146
Originated One Year Prior   0   4,563
Originated Two Years Prior   6,325   3,048
Originated Three Years Prior   1,228   25,313
Originated Four Years Prior   10,985   12,463
Originated Five or More Years Prior   75,496   67,919
Revolving Loans   36,214   42,797
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process   136,163   156,249
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
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process   0   0
Commercial Portfolio Segment [Member]        
Originated Current Fiscal Year   166,789   166,088
Originated One Year Prior   147,529   194,609
Originated Two Years Prior   172,107   140,229
Originated Three Years Prior   94,746   221,318
Originated Four Years Prior   210,402   180,314
Originated Five or More Years Prior   302,514   158,725
Revolving Loans   562,829   504,680
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process   1,656,916   1,565,963
Gross write-off, current year   0   0
Gross write-off, one year prior   146   0
Gross write-off, two years prior   39   32
Gross write-off, three years prior   0   1,669
Gross write-off, four years prior   12   0
Gross write-off, five years prior   3,340   854
Gross write-off, revolving   756   1,961
Gross write-off 473 4,293 3,484 4,516
Commercial Portfolio Segment [Member] | Pass [Member]        
Originated Current Fiscal Year   160,874   165,942
Originated One Year Prior   147,529   194,070
Originated Two Years Prior   171,861   137,181
Originated Three Years Prior   91,058   217,504
Originated Four Years Prior   206,615   177,715
Originated Five or More Years Prior   290,007   145,173
Revolving Loans   548,845   479,906
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process   1,616,789   1,517,491
Commercial 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   3,007   694
Originated Four Years Prior   738   0
Originated Five or More Years Prior   245   2,927
Revolving Loans   43   44
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process   4,033   3,665
Commercial Portfolio Segment [Member] | Substandard [Member]        
Originated Current Fiscal Year   5,915   146
Originated One Year Prior   0   539
Originated Two Years Prior   246   3,048
Originated Three Years Prior   681   3,120
Originated Four Years Prior   3,049   2,599
Originated Five or More Years Prior   12,262   10,625
Revolving Loans   13,941   24,730
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process   36,094   44,807
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
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process   0   0
Commercial Real Estate Portfolio Segment [Member]        
Originated Current Fiscal Year   1,177,062   1,129,223
Originated One Year Prior   1,072,231   420,830
Originated Two Years Prior   341,611   303,121
Originated Three Years Prior   238,681   1,548,498
Originated Four Years Prior   1,300,435   1,404,550
Originated Five or More Years Prior   2,383,595   1,774,365
Revolving Loans   1,468,007   1,474,109
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process   7,981,622   8,054,696
Gross write-off, current year   0   0
Gross write-off, one year prior   0   0
Gross write-off, two years prior   5   0
Gross write-off, three years prior   765   0
Gross write-off, four years prior   16,382   0
Gross write-off, five years prior   32,598   13,839
Gross write-off, revolving   0   0
Gross write-off 4,700 49,750 10,282 13,839
Commercial Real Estate Portfolio Segment [Member] | Pass [Member]        
Originated Current Fiscal Year   1,177,062   1,129,223
Originated One Year Prior   1,072,231   416,806
Originated Two Years Prior   335,532   303,121
Originated Three Years Prior   238,681   1,487,034
Originated Four Years Prior   1,264,055   1,391,743
Originated Five or More Years Prior   2,287,008   1,648,135
Revolving Loans   1,429,162   1,451,710
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process   7,803,731   7,827,772
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   39,271
Originated Four Years Prior   28,444   3,741
Originated Five or More Years Prior   36,200   71,452
Revolving Loans   17,642   6,998
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process   82,286   121,462
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]        
Originated Current Fiscal Year   0   0
Originated One Year Prior   0   4,024
Originated Two Years Prior   6,079   0
Originated Three Years Prior   0   22,193
Originated Four Years Prior   7,936   9,066
Originated Five or More Years Prior   60,387   54,778
Revolving Loans   21,203   15,401
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process   95,605   105,462
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
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process   0   0
Commercial Construction Portfolio Segment [Member]        
Originated Current Fiscal Year   67,742   108,660
Originated One Year Prior   145,346   120,104
Originated Two Years Prior   128,841   36,316
Originated Three Years Prior   18,948   17,912
Originated Four Years Prior   8,091   63,727
Originated Five or More Years Prior   19,877   44,193
Revolving Loans   196,862   232,990
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process   585,707   623,902
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) 0
Commercial Construction Portfolio Segment [Member] | Pass [Member]        
Originated Current Fiscal Year   67,742   108,660
Originated One Year Prior   145,346   120,104
Originated Two Years Prior   128,841   36,316
Originated Three Years Prior   18,948   17,912
Originated Four Years Prior   8,091   63,727
Originated Five or More Years Prior   19,877   44,193
Revolving Loans   196,862   232,990
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process   585,707   623,902
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   0
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process   0   0
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
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process   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
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process   0   0
Residential Portfolio Segment [Member]        
Originated Current Fiscal Year   91,336   36,615
Originated One Year Prior   24,813   26,638
Originated Two Years Prior   14,635   33,577
Originated Three Years Prior   28,272   201,351
Originated Four Years Prior   192,277   115,013
Originated Five or More Years Prior   493,057   418,533
Revolving Loans   362,702   379,253
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process   1,207,092   1,210,980
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   1   1,000
Gross write-off (0) 1 (0) 1,000
Residential Portfolio Segment [Member] | Pass [Member]        
Originated Current Fiscal Year   91,336   36,615
Originated One Year Prior   24,813   26,638
Originated Two Years Prior   14,635   33,577
Originated Three Years Prior   27,725   201,351
Originated Four Years Prior   192,277   114,215
Originated Five or More Years Prior   490,210   416,017
Revolving Loans   358,338   373,244
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process   1,199,334   1,201,657
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   0   0
Revolving Loans   3,294   3,343
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process   3,294   3,343
Residential 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   547   0
Originated Four Years Prior   0   798
Originated Five or More Years Prior   2,847   2,516
Revolving Loans   1,070   2,666
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process   4,464   5,980
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
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process   0   0
Consumer Portfolio Segment [Member]        
Originated Current Fiscal Year   4,126   1,863
Originated One Year Prior   8   0
Originated Two Years Prior   6   0
Originated Three Years Prior   1   0
Originated Four Years Prior   0   0
Originated Five or More Years Prior   56   63
Revolving Loans   109   91
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process   4,306   2,017
Gross write-off, current year   0   25
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 26
Consumer Portfolio Segment [Member] | Pass [Member]        
Originated Current Fiscal Year   4,126   1,863
Originated One Year Prior   8   0
Originated Two Years Prior   6   0
Originated Three Years Prior   1   0
Originated Four Years Prior   0   0
Originated Five or More Years Prior   56   63
Revolving Loans   109   91
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process   4,306   2,017
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
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process   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
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process   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
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, Fee, and Loan in Process   $ 0   $ 0