v3.26.1
Loans - Risk Category of Loans by Class (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
Financing Receivable, Credit Quality Indicator [Line Items]          
Total $ 5,941,410   $ 5,941,410   $ 5,884,448
Current Period Gross Charge-Offs          
Total 945 $ 1,021 2,413 $ 1,646  
Commercial and Industrial Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Year one 64,924   64,924   141,369
Year two 117,965   117,965   108,253
Year three 94,819   94,819   69,585
Year four 60,854   60,854   84,744
Year five 71,258   71,258   57,279
Prior 94,288   94,288   58,662
Revolving Loans Amortized Cost Basis 241,506   241,506   241,275
Total 745,614   745,614   761,167
Current Period Gross Charge-Offs          
Year one     0   0
Year two     0   306
Year three     0   0
Year four     0   138
Year five     114   0
Prior     7   77
Revolving Loans Amortized Cost Basis     367   243
Total 0 247 488 373 764
Commercial and Industrial Loans | Pass          
Financing Receivable, Credit Quality Indicator [Line Items]          
Year one 63,674   63,674   139,921
Year two 117,358   117,358   105,911
Year three 92,421   92,421   64,427
Year four 56,277   56,277   77,540
Year five 64,987   64,987   52,599
Prior 77,806   77,806   45,106
Revolving Loans Amortized Cost Basis 234,672   234,672   231,427
Total 707,195   707,195   716,931
Commercial and Industrial Loans | Special Mention          
Financing Receivable, Credit Quality Indicator [Line Items]          
Year one 0   0   1,171
Year two 529   529   714
Year three 940   940   2,077
Year four 1,894   1,894   1,221
Year five 1,097   1,097   286
Prior 3,062   3,062   2,046
Revolving Loans Amortized Cost Basis 4,595   4,595   5,364
Total 12,117   12,117   12,879
Commercial and Industrial Loans | Substandard          
Financing Receivable, Credit Quality Indicator [Line Items]          
Year one 1,250   1,250   277
Year two 78   78   1,628
Year three 1,458   1,458   3,081
Year four 2,683   2,683   5,983
Year five 5,174   5,174   4,394
Prior 13,420   13,420   11,510
Revolving Loans Amortized Cost Basis 2,239   2,239   4,484
Total 26,302   26,302   31,357
Commercial and Industrial Loans | Doubtful          
Financing Receivable, Credit Quality Indicator [Line Items]          
Year one 0   0   0
Year two 0   0   0
Year three 0   0   0
Year four 0   0   0
Year five 0   0   0
Prior 0   0   0
Revolving Loans Amortized Cost Basis 0   0   0
Total 0   0   0
Commercial Real Estate Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Year one 220,560   220,560   456,091
Year two 513,614   513,614   438,051
Year three 415,276   415,276   403,784
Year four 392,949   392,949   521,291
Year five 479,657   479,657   460,607
Prior 1,157,127   1,157,127   825,788
Revolving Loans Amortized Cost Basis 40,250   40,250   36,860
Total 3,219,433   3,219,433   3,142,472
Current Period Gross Charge-Offs          
Year one     0   0
Year two     0   0
Year three     0   0
Year four     0   0
Year five     0   0
Prior     0   26
Revolving Loans Amortized Cost Basis     0   0
Total 0 26 0 26 26
Commercial Real Estate Loans | Pass          
Financing Receivable, Credit Quality Indicator [Line Items]          
Year one 216,666   216,666   455,803
Year two 513,434   513,434   435,591
Year three 412,908   412,908   385,103
Year four 355,467   355,467   515,257
Year five 472,949   472,949   443,780
Prior 1,096,282   1,096,282   774,987
Revolving Loans Amortized Cost Basis 38,918   38,918   36,077
Total 3,106,624   3,106,624   3,046,598
Commercial Real Estate Loans | Special Mention          
Financing Receivable, Credit Quality Indicator [Line Items]          
Year one 3,668   3,668   220
Year two 123   123   2,448
Year three 2,368   2,368   17,816
Year four 36,397   36,397   3,173
Year five 3,091   3,091   7,879
Prior 27,944   27,944   22,681
Revolving Loans Amortized Cost Basis 1,332   1,332   783
Total 74,923   74,923   55,000
Commercial Real Estate Loans | Substandard          
Financing Receivable, Credit Quality Indicator [Line Items]          
Year one 226   226   68
Year two 57   57   12
Year three 0   0   865
Year four 1,085   1,085   2,861
Year five 3,617   3,617   8,948
Prior 32,901   32,901   28,120
Revolving Loans Amortized Cost Basis 0   0   0
Total 37,886   37,886   40,874
Commercial Real Estate Loans | Doubtful          
Financing Receivable, Credit Quality Indicator [Line Items]          
Year one 0   0   0
Year two 0   0   0
Year three 0   0   0
Year four 0   0   0
Year five 0   0   0
Prior 0   0   0
Revolving Loans Amortized Cost Basis 0   0   0
Total 0   0   0
Agricultural Loans          
Financing Receivable, Credit Quality Indicator [Line Items]          
Year one 32,131   32,131   59,474
Year two 54,192   54,192   38,254
Year three 33,710   33,710   36,793
Year four 31,436   31,436   47,879
Year five 44,863   44,863   32,295
Prior 156,214   156,214   142,676
Revolving Loans Amortized Cost Basis 124,059   124,059   131,797
Total 476,605   476,605   489,168
Current Period Gross Charge-Offs          
Year one     0   0
Year two     0   0
Year three     0   0
Year four     0   0
Year five     0   0
Prior     0   8
Revolving Loans Amortized Cost Basis     0   0
Total 0 0 0 0 8
Agricultural Loans | Pass          
Financing Receivable, Credit Quality Indicator [Line Items]          
Year one 30,283   30,283   54,791
Year two 46,645   46,645   35,843
Year three 31,130   31,130   33,138
Year four 26,314   26,314   45,677
Year five 40,030   40,030   29,011
Prior 133,959   133,959   126,308
Revolving Loans Amortized Cost Basis 103,318   103,318   118,304
Total 411,679   411,679   443,072
Agricultural Loans | Special Mention          
Financing Receivable, Credit Quality Indicator [Line Items]          
Year one 1,748   1,748   4,683
Year two 7,397   7,397   1,974
Year three 2,117   2,117   2,823
Year four 4,350   4,350   2,138
Year five 4,738   4,738   3,183
Prior 17,597   17,597   11,842
Revolving Loans Amortized Cost Basis 20,018   20,018   12,510
Total 57,965   57,965   39,153
Agricultural Loans | Substandard          
Financing Receivable, Credit Quality Indicator [Line Items]          
Year one 100   100   0
Year two 150   150   437
Year three 463   463   832
Year four 772   772   64
Year five 95   95   101
Prior 4,658   4,658   4,526
Revolving Loans Amortized Cost Basis 723   723   983
Total 6,961   6,961   6,943
Agricultural Loans | Doubtful          
Financing Receivable, Credit Quality Indicator [Line Items]          
Year one 0   0   0
Year two 0   0   0
Year three 0   0   0
Year four 0   0   0
Year five 0   0   0
Prior 0   0   0
Revolving Loans Amortized Cost Basis 0   0   0
Total 0   0   0
Leases          
Financing Receivable, Credit Quality Indicator [Line Items]          
Year one 15,685   15,685   33,383
Year two 29,229   29,229   24,235
Year three 21,430   21,430   19,668
Year four 15,860   15,860   4,356
Year five 2,368   2,368   2,064
Prior 3,652   3,652   3,367
Revolving Loans Amortized Cost Basis 0   0   0
Total 88,224   88,224   87,073
Current Period Gross Charge-Offs          
Year one     0   0
Year two     0   0
Year three     0   0
Year four     149   0
Year five     0   0
Prior     0   0
Revolving Loans Amortized Cost Basis     0   0
Total 0 $ 0 149 $ 0 0
Leases | Pass          
Financing Receivable, Credit Quality Indicator [Line Items]          
Year one 15,685   15,685   33,383
Year two 29,229   29,229   24,235
Year three 21,430   21,430   19,668
Year four 15,860   15,860   4,356
Year five 2,368   2,368   2,064
Prior 3,652   3,652   3,367
Revolving Loans Amortized Cost Basis 0   0   0
Total 88,224   88,224   87,073
Leases | Special Mention          
Financing Receivable, Credit Quality Indicator [Line Items]          
Year one 0   0   0
Year two 0   0   0
Year three 0   0   0
Year four 0   0   0
Year five 0   0   0
Prior 0   0   0
Revolving Loans Amortized Cost Basis 0   0   0
Total 0   0   0
Leases | Substandard          
Financing Receivable, Credit Quality Indicator [Line Items]          
Year one 0   0   0
Year two 0   0   0
Year three 0   0   0
Year four 0   0   0
Year five 0   0   0
Prior 0   0   0
Revolving Loans Amortized Cost Basis 0   0   0
Total 0   0   0
Leases | Doubtful          
Financing Receivable, Credit Quality Indicator [Line Items]          
Year one 0   0   0
Year two 0   0   0
Year three 0   0   0
Year four 0   0   0
Year five 0   0   0
Prior 0   0   0
Revolving Loans Amortized Cost Basis 0   0   0
Total $ 0   $ 0   $ 0