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Allowance for Credit Losses - Credit Quality Indicators by Commercial and Industrial Loans (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2025 | Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans | $ 6,066,645 | $ 6,019,922
Commercial and industrial | Commercial and industrial other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 51,511 | 165,568
One year before current fiscal year | 140,588 | 114,879
Two years before current fiscal year | 104,757 | 61,199
Three years before current fiscal year | 87,880 | 54,938
Four years before current fiscal year | 51,873 | 19,459
Prior | 163,886 | 145,768
Revolving Loans Amortized Cost Basis | 274,324 | 257,789
Revolving Loans Converted to Term | 2,332 | 35,968
Total Loans | 877,151 | 855,568
Current-period gross writeoffs |  |
Current fiscal year | 0 | 0
One year before current fiscal year | 80 | 15
Two years before current fiscal year | 67 | 30
Three years before current fiscal year | 38 | 44
Four years before current fiscal year | 0 | 21
Prior | 0 | 432
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total | 185 | 542
Commercial and industrial | Commercial and industrial other | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 51,511 | 164,809
One year before current fiscal year | 139,937 | 114,591
Two years before current fiscal year | 104,517 | 60,984
Three years before current fiscal year | 87,715 | 54,087
Four years before current fiscal year | 51,230 | 19,311
Prior | 162,874 | 144,785
Revolving Loans Amortized Cost Basis | 273,078 | 256,621
Revolving Loans Converted to Term | 2,139 | 35,968
Total Loans | 873,001 | 851,156
Commercial and industrial | Commercial and industrial other | Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 0 | 334
One year before current fiscal year | 246 | 288
Two years before current fiscal year | 221 | 174
Three years before current fiscal year | 137 | 808
Four years before current fiscal year | 111 | 144
Prior | 394 | 375
Revolving Loans Amortized Cost Basis | 150 | 157
Revolving Loans Converted to Term | 0 | 0
Total Loans | 1,259 | 2,280
Commercial and industrial | Commercial and industrial other | Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 0 | 425
One year before current fiscal year | 405 | 0
Two years before current fiscal year | 19 | 41
Three years before current fiscal year | 28 | 43
Four years before current fiscal year | 532 | 4
Prior | 618 | 608
Revolving Loans Amortized Cost Basis | 1,096 | 1,011
Revolving Loans Converted to Term | 193 | 0
Total Loans | 2,891 | 2,132
Commercial and industrial | Agriculture |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 3,163 | 15,686
One year before current fiscal year | 12,935 | 23,823
Two years before current fiscal year | 25,938 | 9,893
Three years before current fiscal year | 9,331 | 2,267
Four years before current fiscal year | 2,019 | 1,701
Prior | 7,390 | 11,304
Revolving Loans Amortized Cost Basis | 32,514 | 42,438
Revolving Loans Converted to Term | 398 | 2,895
Total Loans | 93,688 | 110,007
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 | 0 | 0
Commercial and industrial | Agriculture | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 3,163 | 15,686
One year before current fiscal year | 12,935 | 23,823
Two years before current fiscal year | 25,938 | 9,893
Three years before current fiscal year | 9,331 | 2,233
Four years before current fiscal year | 1,988 | 1,660
Prior | 7,353 | 11,304
Revolving Loans Amortized Cost Basis | 32,514 | 42,438
Revolving Loans Converted to Term | 398 | 2,895
Total Loans | 93,620 | 109,932
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 | 34
Four years before current fiscal year | 31 | 0
Prior | 0 | 0
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | 31 | 34
Commercial and industrial | 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 | 41
Prior | 37 | 0
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | 37 | 41
Commercial real estate | Commercial and industrial other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 73,427 | 332,674
One year before current fiscal year | 338,554 | 243,537
Two years before current fiscal year | 276,613 | 327,483
Three years before current fiscal year | 346,959 | 358,250
Four years before current fiscal year | 355,754 | 294,265
Prior | 1,408,789 | 1,147,068
Revolving Loans Amortized Cost Basis | 19,969 | 56,069
Revolving Loans Converted to Term | 7,217 | 16,958
Total Loans | 2,827,282 | 2,776,304
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 | 0 | 0
Commercial real estate | Commercial and industrial other | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 73,427 | 331,943
One year before current fiscal year | 337,823 | 242,564
Two years before current fiscal year | 275,679 | 324,510
Three years before current fiscal year | 343,991 | 355,090
Four years before current fiscal year | 351,697 | 277,220
Prior | 1,329,497 | 1,088,575
Revolving Loans Amortized Cost Basis | 19,042 | 50,632
Revolving Loans Converted to Term | 7,217 | 16,958
Total Loans | 2,738,373 | 2,687,492
Commercial real estate | Commercial and industrial other | 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 | 1,499
Three years before current fiscal year | 1,494 | 599
Four years before current fiscal year | 593 | 15,205
Prior | 31,215 | 12,637
Revolving Loans Amortized Cost Basis | 0 | 4,452
Revolving Loans Converted to Term | 0 | 0
Total Loans | 33,302 | 34,392
Commercial real estate | Commercial and industrial other | Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 0 | 731
One year before current fiscal year | 731 | 973
Two years before current fiscal year | 934 | 1,474
Three years before current fiscal year | 1,474 | 2,561
Four years before current fiscal year | 3,464 | 1,840
Prior | 48,077 | 45,856
Revolving Loans Amortized Cost Basis | 927 | 985
Revolving Loans Converted to Term | 0 | 0
Total Loans | 55,607 | 54,420
Commercial real estate | Agriculture |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 8,210 | 23,754
One year before current fiscal year | 24,501 | 11,594
Two years before current fiscal year | 12,020 | 37,398
Three years before current fiscal year | 36,942 | 21,510
Four years before current fiscal year | 21,068 | 19,853
Prior | 113,394 | 97,354
Revolving Loans Amortized Cost Basis | 5,068 | 4,169
Revolving Loans Converted to Term | 449 | 1,950
Total Loans | 221,652 | 217,582
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 | 0 | 0
Commercial real estate | Agriculture | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 8,210 | 23,754
One year before current fiscal year | 24,501 | 11,594
Two years before current fiscal year | 12,020 | 37,398
Three years before current fiscal year | 36,942 | 21,510
Four years before current fiscal year | 21,068 | 19,853
Prior | 113,053 | 96,967
Revolving Loans Amortized Cost Basis | 5,068 | 4,169
Revolving Loans Converted to Term | 449 | 1,950
Total Loans | 221,311 | 217,195
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 | 198 | 217
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | 198 | 217
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 | 143 | 170
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | 143 | 170
Commercial real estate | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 0 | 13,160
One year before current fiscal year | 17,426 | 744
Two years before current fiscal year | 12,839 | 682
Three years before current fiscal year | 20,366 | 5,003
Four years before current fiscal year | 25,431 | 1,986
Prior | 2,674 | 802
Revolving Loans Amortized Cost Basis | 294,836 | 310,879
Revolving Loans Converted to Term | 3,666 | 52,675
Total Loans | 377,238 | 385,931
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 | 0 | 0
Commercial real estate | Construction | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 0 | 13,160
One year before current fiscal year | 17,426 | 744
Two years before current fiscal year | 12,839 | 682
Three years before current fiscal year | 20,366 | 5,003
Four years before current fiscal year | 25,431 | 1,986
Prior | 2,674 | 802
Revolving Loans Amortized Cost Basis | 277,534 | 293,479
Revolving Loans Converted to Term | 3,666 | 52,675
Total Loans | 359,936 | 368,531
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 | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | 0 | 0
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 | 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 | 17,302 | 17,400
Revolving Loans Converted to Term | 0 | 0
Total Loans | 17,302 | 17,400
Residential Real Estate | Home equity |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 210 | 15,181
One year before current fiscal year | 15,711 | 3,106
Two years before current fiscal year | 3,185 | 2,383
Three years before current fiscal year | 2,891 | 1,053
Four years before current fiscal year | 956 | 784
Prior | 16,590 | 13,587
Revolving Loans Amortized Cost Basis | 165,025 | 165,497
Revolving Loans Converted to Term | 944 | 2,603
Total Loans | 205,512 | 204,194
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 | 0 | 0
Residential Real Estate | Home equity | Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 210 | 15,181
One year before current fiscal year | 15,711 | 3,106
Two years before current fiscal year | 3,185 | 2,383
Three years before current fiscal year | 2,891 | 1,053
Four years before current fiscal year | 956 | 784
Prior | 15,931 | 12,993
Revolving Loans Amortized Cost Basis | 162,186 | 163,202
Revolving Loans Converted to Term | 944 | 2,603
Total Loans | 202,014 | 201,305
Residential Real Estate | 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 | 659 | 594
Revolving Loans Amortized Cost Basis | 2,839 | 2,295
Revolving Loans Converted to Term | 0 | 0
Total Loans | 3,498 | 2,889
Residential Real Estate | Mortgages |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 21,477 | 106,698
One year before current fiscal year | 109,306 | 131,170
Two years before current fiscal year | 129,748 | 172,922
Three years before current fiscal year | 170,441 | 240,044
Four years before current fiscal year | 235,718 | 205,258
Prior | 699,751 | 510,554
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | 1,366,441 | 1,366,646
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 | 0 | 0
Residential Real Estate | Mortgages | Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 21,477 | 106,698
One year before current fiscal year | 109,306 | 130,463
Two years before current fiscal year | 129,055 | 172,310
Three years before current fiscal year | 169,732 | 239,307
Four years before current fiscal year | 234,890 | 204,310
Prior | 688,337 | 500,169
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | 1,352,797 | 1,353,257
Residential Real Estate | Mortgages | Nonperforming |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 0 | 0
One year before current fiscal year | 0 | 707
Two years before current fiscal year | 693 | 612
Three years before current fiscal year | 709 | 737
Four years before current fiscal year | 828 | 948
Prior | 11,414 | 10,385
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | 13,644 | 13,389
Consumer and other | Direct |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 25,307 | 40,812
One year before current fiscal year | 14,881 | 18,086
Two years before current fiscal year | 15,764 | 10,046
Three years before current fiscal year | 9,415 | 9,117
Four years before current fiscal year | 8,361 | 3,957
Prior | 14,488 | 11,562
Revolving Loans Amortized Cost Basis | 2,405 | 2,583
Revolving Loans Converted to Term | 0 | 0
Total Loans | 90,621 | 96,163
Current-period gross writeoffs |  |
Current fiscal year | 722 | 2,272
One year before current fiscal year | 3 | 15
Two years before current fiscal year | 0 | 11
Three years before current fiscal year | 13 | 32
Four years before current fiscal year | 17 | 10
Prior | 20 | 229
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total | 775 | 2,569
Consumer and other | Direct | Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 25,307 | 40,812
One year before current fiscal year | 14,881 | 18,082
Two years before current fiscal year | 15,761 | 10,022
Three years before current fiscal year | 9,403 | 9,109
Four years before current fiscal year | 8,361 | 3,953
Prior | 14,402 | 11,485
Revolving Loans Amortized Cost Basis | 2,391 | 2,575
Revolving Loans Converted to Term | 0 | 0
Total Loans | 90,506 | 96,038
Consumer and other | Direct | Nonperforming |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 0 | 0
One year before current fiscal year | 0 | 4
Two years before current fiscal year | 3 | 24
Three years before current fiscal year | 12 | 8
Four years before current fiscal year | 0 | 4
Prior | 86 | 77
Revolving Loans Amortized Cost Basis | 14 | 8
Revolving Loans Converted to Term | 0 | 0
Total Loans | 115 | 125
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 | 52
Four years before current fiscal year | 42 | 23
Prior | 114 | 154
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | 156 | 229
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 | 4 | 29
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total | 4 | 29
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 | 52
Four years before current fiscal year | 42 | 23
Prior | 110 | 141
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | 152 | 216
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 | 4 | 13
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | $ 4 | $ 13

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