v3.26.1
Allowance for Credit Losses - Schedule of Credit Quality Indicators by Commercial and Industrial Loans (Details) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total Loans $ 6,597,178 $ 6,446,245
Commercial and Industrial | Commercial and industrial other    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current fiscal year 119,163 188,870
One year before current fiscal year 160,848 121,398
Two years before current fiscal year 104,165 83,406
Three years before current fiscal year 67,878 75,131
Four years before current fiscal year 46,848 37,672
Prior 143,172 128,366
Revolving Loans Amortized Cost Basis 408,770 342,383
Revolving Loans Converted to Term 22,335 8,947
Total Loans 1,073,179 986,173
Current-period gross writeoffs    
Current fiscal year 0 526
One year before current fiscal year 223 597
Two years before current fiscal year 496 85
Three years before current fiscal year 250 66
Four years before current fiscal year 451 254
Prior 96 13
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total Loans 1,516 1,541
Commercial and Industrial | Commercial and industrial other | Pass    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current fiscal year 119,163 178,999
One year before current fiscal year 160,508 111,528
Two years before current fiscal year 102,034 81,883
Three years before current fiscal year 66,515 73,977
Four years before current fiscal year 45,778 37,104
Prior 140,814 126,706
Revolving Loans Amortized Cost Basis 377,022 316,314
Revolving Loans Converted to Term 21,708 8,606
Total Loans 1,033,542 935,117
Commercial and Industrial | Commercial and industrial other | Special Mention    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current fiscal year 0 9,871
One year before current fiscal year 285 9,447
Two years before current fiscal year 1,190 90
Three years before current fiscal year 62 1,154
Four years before current fiscal year 12 178
Prior 1,315 1,468
Revolving Loans Amortized Cost Basis 24,823 21,037
Revolving Loans Converted to Term 627 0
Total Loans 28,314 43,245
Commercial and Industrial | Commercial and industrial other | Substandard    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current fiscal year 0 0
One year before current fiscal year 55 423
Two years before current fiscal year 941 1,433
Three years before current fiscal year 1,301 0
Four years before current fiscal year 1,058 390
Prior 1,043 192
Revolving Loans Amortized Cost Basis 6,925 5,032
Revolving Loans Converted to Term 0 341
Total Loans 11,323 7,811
Commercial and Industrial | Agriculture    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current fiscal year 13,343 11,890
One year before current fiscal year 9,349 9,337
Two years before current fiscal year 7,834 24,659
Three years before current fiscal year 22,134 7,539
Four years before current fiscal year 6,384 1,440
Prior 4,233 3,877
Revolving Loans Amortized Cost Basis 54,365 55,263
Revolving Loans Converted to Term 314 470
Total Loans 117,956 114,475
Current-period gross writeoffs    
Current fiscal year 0 0
One year before current fiscal year 50 0
Two years before current fiscal year 0 0
Three years before current fiscal year 0 0
Four years before current fiscal year 0 0
Prior 0 0
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total Loans 50 0
Commercial and Industrial | Agriculture | Pass    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current fiscal year 13,343 11,890
One year before current fiscal year 9,327 9,337
Two years before current fiscal year 7,834 24,659
Three years before current fiscal year 22,134 7,539
Four years before current fiscal year 6,381 1,418
Prior 4,202 3,852
Revolving Loans Amortized Cost Basis 54,349 55,263
Revolving Loans Converted to Term 314 470
Total Loans 117,884 114,428
Commercial and Industrial | Agriculture | Special Mention    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current fiscal year 0 0
One year before current fiscal year 0 0
Two years before current fiscal year 0 0
Three years before current fiscal year 0 0
Four years before current fiscal year 0 22
Prior 14 25
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total Loans 14 47
Commercial and Industrial | Agriculture | Substandard    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current fiscal year 0 0
One year before current fiscal year 22 0
Two years before current fiscal year 0 0
Three years before current fiscal year 0 0
Four years before current fiscal year 3 0
Prior 17 0
Revolving Loans Amortized Cost Basis 16 0
Revolving Loans Converted to Term 0 0
Total Loans 58 0
Commercial Real Estate | Commercial and industrial other    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current fiscal year 111,679 416,029
One year before current fiscal year 420,970 320,882
Two years before current fiscal year 325,634 258,420
Three years before current fiscal year 266,870 313,161
Four years before current fiscal year 298,241 377,259
Prior 1,532,745 1,253,800
Revolving Loans Amortized Cost Basis 14,424 20,075
Revolving Loans Converted to Term 31,896 19,216
Total Loans 3,002,459 2,978,842
Current-period gross writeoffs    
Current fiscal year 0 0
One year before current fiscal year 0 0
Two years before current fiscal year 98 0
Three years before current fiscal year 0 0
Four years before current fiscal year 394 2,000
Prior 0 5,310
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total Loans 492 7,310
Commercial Real Estate | Commercial and industrial other | Pass    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current fiscal year 111,679 409,529
One year before current fiscal year 412,690 320,178
Two years before current fiscal year 324,192 256,566
Three years before current fiscal year 258,522 310,051
Four years before current fiscal year 289,184 374,436
Prior 1,483,571 1,204,064
Revolving Loans Amortized Cost Basis 13,735 19,291
Revolving Loans Converted to Term 14,594 19,216
Total Loans 2,908,167 2,913,331
Commercial Real Estate | Commercial and industrial other | Special Mention    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current fiscal year 0 6,500
One year before current fiscal year 8,280 305
Two years before current fiscal year 0 927
Three years before current fiscal year 7,422 1,961
Four years before current fiscal year 7,356 1,362
Prior 27,655 45,932
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total Loans 50,713 56,987
Commercial Real Estate | Commercial and industrial other | Substandard    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current fiscal year 0 0
One year before current fiscal year 0 399
Two years before current fiscal year 1,442 927
Three years before current fiscal year 926 1,149
Four years before current fiscal year 1,701 1,461
Prior 21,519 3,804
Revolving Loans Amortized Cost Basis 689 784
Revolving Loans Converted to Term 17,302 0
Total Loans 43,579 8,524
Commercial Real Estate | Agriculture    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current fiscal year 16,595 26,485
One year before current fiscal year 27,762 23,114
Two years before current fiscal year 24,145 11,133
Three years before current fiscal year 10,980 41,082
Four years before current fiscal year 39,194 20,087
Prior 114,545 103,877
Revolving Loans Amortized Cost Basis 5,728 4,488
Revolving Loans Converted to Term 2,025 4,026
Total Loans 240,974 234,292
Current-period gross writeoffs    
Current fiscal year 0 0
One year before current fiscal year 0 0
Two years before current fiscal year 0 0
Three years before current fiscal year 0 0
Four years before current fiscal year 0 0
Prior 0 0
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total Loans 0 0
Commercial Real Estate | Agriculture | Pass    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current fiscal year 16,595 26,485
One year before current fiscal year 27,762 23,114
Two years before current fiscal year 24,145 11,133
Three years before current fiscal year 10,980 41,082
Four years before current fiscal year 39,194 20,087
Prior 114,313 103,609
Revolving Loans Amortized Cost Basis 5,728 4,488
Revolving Loans Converted to Term 2,025 4,026
Total Loans 240,742 234,024
Commercial Real Estate | Agriculture | Special Mention    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current fiscal year 0 0
One year before current fiscal year 0 0
Two years before current fiscal year 0 0
Three years before current fiscal year 0 0
Four years before current fiscal year 0 0
Prior 137 141
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total Loans 137 141
Commercial Real Estate | Agriculture | Substandard    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current fiscal year 0 0
One year before current fiscal year 0 0
Two years before current fiscal year 0 0
Three years before current fiscal year 0 0
Four years before current fiscal year 0 0
Prior 95 127
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total Loans 95 127
Commercial Real Estate | Construction    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current fiscal year 0 0
One year before current fiscal year 3,228 13,222
Two years before current fiscal year 32,748 30,274
Three years before current fiscal year 53,580 1,542
Four years before current fiscal year 18,171 15,688
Prior 14,417 349
Revolving Loans Amortized Cost Basis 333,226 362,167
Revolving Loans Converted to Term 10,406 25,659
Total Loans 465,776 448,901
Current-period gross writeoffs    
Current fiscal year 0 0
One year before current fiscal year 0 0
Two years before current fiscal year 0 0
Three years before current fiscal year 0 0
Four years before current fiscal year 0 0
Prior 0 0
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total Loans 0 0
Commercial Real Estate | Construction | Pass    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current fiscal year 0 0
One year before current fiscal year 3,228 13,222
Two years before current fiscal year 31,423 30,274
Three years before current fiscal year 53,580 1,542
Four years before current fiscal year 18,171 15,688
Prior 14,417 349
Revolving Loans Amortized Cost Basis 328,773 344,568
Revolving Loans Converted to Term 10,406 25,659
Total Loans 459,998 431,302
Commercial Real Estate | Construction | Special Mention    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current fiscal year 0 0
One year before current fiscal year 0 0
Two years before current fiscal year 0 0
Three years before current fiscal year 0 0
Four years before current fiscal year 0 0
Prior 0 0
Revolving Loans Amortized Cost Basis 4,453 297
Revolving Loans Converted to Term 0 0
Total Loans 4,453 297
Commercial Real Estate | Construction | Substandard    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current fiscal year 0 0
One year before current fiscal year 0 0
Two years before current fiscal year 1,325 0
Three years before current fiscal year 0 0
Four years before current fiscal year 0 0
Prior 0 0
Revolving Loans Amortized Cost Basis 0 17,302
Revolving Loans Converted to Term 0 0
Total Loans 1,325 17,302
Residential | Home equity    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current fiscal year 947 1,613
One year before current fiscal year 1,468 767
Two years before current fiscal year 743 1,448
Three years before current fiscal year 1,229 1,309
Four years before current fiscal year 1,147 795
Prior 18,096 18,691
Revolving Loans Amortized Cost Basis 218,624 201,360
Revolving Loans Converted to Term 1,394 1,671
Total Loans 243,648 227,654
Current-period gross writeoffs    
Current fiscal year 0 0
One year before current fiscal year 0 0
Two years before current fiscal year 0 0
Three years before current fiscal year 0 0
Four years before current fiscal year 0 0
Prior 0 0
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total Loans 0 0
Residential | Home equity | Performing    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current fiscal year 947 1,613
One year before current fiscal year 1,468 767
Two years before current fiscal year 743 1,448
Three years before current fiscal year 1,229 1,309
Four years before current fiscal year 1,147 795
Prior 16,658 17,309
Revolving Loans Amortized Cost Basis 216,891 200,118
Revolving Loans Converted to Term 1,394 1,671
Total Loans 240,477 225,030
Residential | Home equity | Nonperforming    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current fiscal year 0 0
One year before current fiscal year 0 0
Two years before current fiscal year 0 0
Three years before current fiscal year 0 0
Four years before current fiscal year 0 0
Prior 1,438 1,382
Revolving Loans Amortized Cost Basis 1,733 1,242
Revolving Loans Converted to Term 0 0
Total Loans 3,171 2,624
Residential | Mortgages    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current fiscal year 58,368 113,126
One year before current fiscal year 112,236 104,971
Two years before current fiscal year 98,872 121,663
Three years before current fiscal year 115,718 161,664
Four years before current fiscal year 154,795 221,830
Prior 823,622 640,278
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total Loans 1,363,611 1,363,532
Current-period gross writeoffs    
Current fiscal year 0 0
One year before current fiscal year 0 0
Two years before current fiscal year 0 0
Three years before current fiscal year 0 0
Four years before current fiscal year 0 0
Prior 0 0
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total Loans 0 0
Residential | Mortgages | Performing    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current fiscal year 58,368 113,023
One year before current fiscal year 111,963 104,677
Two years before current fiscal year 98,349 120,785
Three years before current fiscal year 115,060 160,682
Four years before current fiscal year 153,980 220,793
Prior 811,055 629,641
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total Loans 1,348,775 1,349,601
Residential | Mortgages | Nonperforming    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current fiscal year 0 103
One year before current fiscal year 273 294
Two years before current fiscal year 523 878
Three years before current fiscal year 658 982
Four years before current fiscal year 815 1,037
Prior 12,567 10,637
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total Loans 14,836 13,931
Consumer and Other | Direct    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current fiscal year 21,586 34,987
One year before current fiscal year 19,270 11,109
Two years before current fiscal year 8,881 11,209
Three years before current fiscal year 9,345 7,451
Four years before current fiscal year 6,381 6,887
Prior 16,740 12,467
Revolving Loans Amortized Cost Basis 2,113 2,289
Revolving Loans Converted to Term 0 0
Total Loans 84,316 86,399
Current-period gross writeoffs    
Current fiscal year 647 2,220
One year before current fiscal year 70 15
Two years before current fiscal year 50 17
Three years before current fiscal year 10 17
Four years before current fiscal year 20 20
Prior 43 55
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total Loans 840 2,344
Consumer and Other | Direct | Performing    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current fiscal year 21,586 34,987
One year before current fiscal year 19,263 11,109
Two years before current fiscal year 8,868 11,207
Three years before current fiscal year 9,332 7,430
Four years before current fiscal year 6,375 6,887
Prior 16,726 12,427
Revolving Loans Amortized Cost Basis 2,111 2,282
Revolving Loans Converted to Term 0 0
Total Loans 84,261 86,329
Consumer and Other | Direct | Nonperforming    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current fiscal year 0 0
One year before current fiscal year 7 0
Two years before current fiscal year 13 2
Three years before current fiscal year 13 21
Four years before current fiscal year 6 0
Prior 14 40
Revolving Loans Amortized Cost Basis 2 7
Revolving Loans Converted to Term 0 0
Total Loans 55 70
Consumer and Other | Indirect    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current fiscal year 0 0
One year before current fiscal year 0 0
Two years before current fiscal year 0 0
Three years before current fiscal year 0 0
Four years before current fiscal year 0 17
Prior 42 51
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total Loans 42 68
Current-period gross writeoffs    
Current fiscal year 0 0
One year before current fiscal year 0 0
Two years before current fiscal year 0 0
Three years before current fiscal year 0 0
Four years before current fiscal year 0 0
Prior 0 15
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total Loans 0 15
Consumer and Other | Indirect | Performing    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current fiscal year 0 0
One year before current fiscal year 0 0
Two years before current fiscal year 0 0
Three years before current fiscal year 0 0
Four years before current fiscal year 0 17
Prior 42 51
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total Loans 42 68
Consumer and Other | Indirect | Nonperforming    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Current fiscal year 0 0
One year before current fiscal year 0 0
Two years before current fiscal year 0 0
Three years before current fiscal year 0 0
Four years before current fiscal year 0 0
Prior 0 0
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term 0 0
Total Loans $ 0 $ 0