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Allowance for Credit Losses - Credit Quality Indicators by Commercial and Industrial Loans (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans | $ 6,019,922 | $ 5,605,935
Commercial and industrial | Other Financing Receivable |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 165,568 | 131,908
One year before current fiscal year | 114,879 | 92,577
Two years before current fiscal year | 61,199 | 68,594
Three years before current fiscal year | 54,938 | 28,948
Four years before current fiscal year | 19,459 | 33,715
Prior | 145,768 | 145,878
Revolving Loans Amortized Cost Basis | 257,789 | 215,611
Revolving Loans Converted to Term | 35,968 | 5,063
Total Loans | 855,568 | 722,294
Current-period gross writeoffs |  |
2024 | 0 | 6
2023 | 15 | 0
2022 | 30 | 0
2021 | 44 | 0
2020 | 21 | 0
Prior | 432 | 29
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | 542 | 35
Commercial and industrial | Other Financing Receivable | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 164,809 | 130,993
One year before current fiscal year | 114,591 | 92,335
Two years before current fiscal year | 60,984 | 68,294
Three years before current fiscal year | 54,087 | 28,377
Four years before current fiscal year | 19,311 | 33,618
Prior | 144,785 | 141,758
Revolving Loans Amortized Cost Basis | 256,621 | 212,349
Revolving Loans Converted to Term | 35,968 | 5,063
Total Loans | 851,156 | 712,787
Commercial and industrial | Other Financing Receivable | Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 334 | 915
One year before current fiscal year | 288 | 196
Two years before current fiscal year | 174 | 222
Three years before current fiscal year | 808 | 242
Four years before current fiscal year | 144 | 79
Prior | 375 | 1,287
Revolving Loans Amortized Cost Basis | 157 | 682
Revolving Loans Converted to Term | 0 | 0
Total Loans | 2,280 | 3,623
Commercial and industrial | Other Financing Receivable | Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 425 | 0
One year before current fiscal year | 0 | 46
Two years before current fiscal year | 41 | 78
Three years before current fiscal year | 43 | 329
Four years before current fiscal year | 4 | 18
Prior | 608 | 2,833
Revolving Loans Amortized Cost Basis | 1,011 | 2,580
Revolving Loans Converted to Term | 0 | 0
Total Loans | 2,132 | 5,884
Commercial and industrial | Agriculture |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 15,686 | 24,924
One year before current fiscal year | 23,823 | 11,935
Two years before current fiscal year | 9,893 | 3,388
Three years before current fiscal year | 2,267 | 3,170
Four years before current fiscal year | 1,701 | 3,268
Prior | 11,304 | 16,767
Revolving Loans Amortized Cost Basis | 42,438 | 36,729
Revolving Loans Converted to Term | 2,895 | 1,030
Total Loans | 110,007 | 101,211
Current-period gross writeoffs |  |
2024 | 0 | 0
2023 | 0 | 0
2022 | 0 | 0
2021 | 0 | 0
2020 | 0 | 0
Prior | 0 | 0
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | 0 | 0
Commercial and industrial | Agriculture | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 15,686 | 24,924
One year before current fiscal year | 23,823 | 11,935
Two years before current fiscal year | 9,893 | 3,341
Three years before current fiscal year | 2,233 | 3,114
Four years before current fiscal year | 1,660 | 3,268
Prior | 11,304 | 16,759
Revolving Loans Amortized Cost Basis | 42,438 | 36,728
Revolving Loans Converted to Term | 2,895 | 1,030
Total Loans | 109,932 | 101,099
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 | 47
Three years before current fiscal year | 34 | 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 | 34 | 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 | 0 | 0
Two years before current fiscal year | 0 | 0
Three years before current fiscal year | 0 | 56
Four years before current fiscal year | 41 | 0
Prior | 0 | 8
Revolving Loans Amortized Cost Basis | 0 | 1
Revolving Loans Converted to Term | 0 | 0
Total Loans | 41 | 65
Commercial real estate | Other Financing Receivable |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 332,674 | 246,016
One year before current fiscal year | 243,537 | 333,515
Two years before current fiscal year | 327,483 | 368,103
Three years before current fiscal year | 358,250 | 310,093
Four years before current fiscal year | 294,265 | 286,203
Prior | 1,147,068 | 983,010
Revolving Loans Amortized Cost Basis | 56,069 | 35,702
Revolving Loans Converted to Term | 16,958 | 24,949
Total Loans | 2,776,304 | 2,587,591
Current-period gross writeoffs |  |
2024 | 0 | 0
2023 | 0 | 0
2022 | 0 | 0
2021 | 0 | 0
2020 | 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 | Other Financing Receivable | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 331,943 | 246,016
One year before current fiscal year | 242,564 | 317,583
Two years before current fiscal year | 324,510 | 365,975
Three years before current fiscal year | 355,090 | 292,960
Four years before current fiscal year | 277,220 | 272,722
Prior | 1,088,575 | 921,201
Revolving Loans Amortized Cost Basis | 50,632 | 34,346
Revolving Loans Converted to Term | 16,958 | 24,949
Total Loans | 2,687,492 | 2,475,752
Commercial real estate | Other Financing Receivable | Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 0 | 0
One year before current fiscal year | 0 | 632
Two years before current fiscal year | 1,499 | 0
Three years before current fiscal year | 599 | 17,133
Four years before current fiscal year | 15,205 | 11,422
Prior | 12,637 | 16,100
Revolving Loans Amortized Cost Basis | 4,452 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | 34,392 | 45,287
Commercial real estate | Other Financing Receivable | Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 731 | 0
One year before current fiscal year | 973 | 15,300
Two years before current fiscal year | 1,474 | 2,128
Three years before current fiscal year | 2,561 | 0
Four years before current fiscal year | 1,840 | 2,059
Prior | 45,856 | 45,709
Revolving Loans Amortized Cost Basis | 985 | 1,356
Revolving Loans Converted to Term | 0 | 0
Total Loans | 54,420 | 66,552
Commercial real estate | Agriculture |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 23,754 | 14,668
One year before current fiscal year | 11,594 | 37,256
Two years before current fiscal year | 37,398 | 22,813
Three years before current fiscal year | 21,510 | 21,001
Four years before current fiscal year | 19,853 | 24,342
Prior | 97,354 | 94,969
Revolving Loans Amortized Cost Basis | 4,169 | 257
Revolving Loans Converted to Term | 1,950 | 6,364
Total Loans | 217,582 | 221,670
Current-period gross writeoffs |  |
2024 | 0 | 0
2023 | 0 | 0
2022 | 0 | 0
2021 | 0 | 0
2020 | 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 | 23,754 | 14,668
One year before current fiscal year | 11,594 | 37,256
Two years before current fiscal year | 37,398 | 22,813
Three years before current fiscal year | 21,510 | 21,001
Four years before current fiscal year | 19,853 | 23,794
Prior | 96,967 | 93,890
Revolving Loans Amortized Cost Basis | 4,169 | 257
Revolving Loans Converted to Term | 1,950 | 6,364
Total Loans | 217,195 | 220,043
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 | 378
Prior | 217 | 1,033
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | 217 | 1,411
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 | 170
Prior | 170 | 46
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | 170 | 216
Commercial real estate | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 13,160 | 9,265
One year before current fiscal year | 744 | 2,793
Two years before current fiscal year | 682 | 8,068
Three years before current fiscal year | 5,003 | 2,501
Four years before current fiscal year | 1,986 | 357
Prior | 802 | 596
Revolving Loans Amortized Cost Basis | 310,879 | 274,224
Revolving Loans Converted to Term | 52,675 | 5,602
Total Loans | 385,931 | 303,406
Current-period gross writeoffs |  |
2024 | 0 | 0
2023 | 0 | 0
2022 | 0 | 0
2021 | 0 | 0
2020 | 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 | 13,160 | 9,265
One year before current fiscal year | 744 | 2,793
Two years before current fiscal year | 682 | 8,068
Three years before current fiscal year | 5,003 | 2,501
Four years before current fiscal year | 1,986 | 357
Prior | 802 | 596
Revolving Loans Amortized Cost Basis | 293,479 | 274,224
Revolving Loans Converted to Term | 52,675 | 5,602
Total Loans | 368,531 | 303,406
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 | 17,400 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | 17,400 | 0
Residential | Home equity |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 15,181 | 2,378
One year before current fiscal year | 3,106 | 2,237
Two years before current fiscal year | 2,383 | 890
Three years before current fiscal year | 1,053 | 529
Four years before current fiscal year | 784 | 832
Prior | 13,587 | 8,515
Revolving Loans Amortized Cost Basis | 165,497 | 167,098
Revolving Loans Converted to Term | 2,603 | 5,837
Total Loans | 204,194 | 188,316
Current-period gross writeoffs |  |
2024 | 0 | 0
2023 | 0 | 0
2022 | 0 | 0
2021 | 0 | 0
2020 | 0 | 0
Prior | 0 | 20
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | 0 | 20
Residential | Home equity | Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 15,181 | 2,378
One year before current fiscal year | 3,106 | 2,237
Two years before current fiscal year | 2,383 | 890
Three years before current fiscal year | 1,053 | 529
Four years before current fiscal year | 784 | 832
Prior | 12,993 | 8,178
Revolving Loans Amortized Cost Basis | 163,202 | 164,205
Revolving Loans Converted to Term | 2,603 | 5,837
Total Loans | 201,305 | 185,086
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 | 594 | 337
Revolving Loans Amortized Cost Basis | 2,295 | 2,893
Revolving Loans Converted to Term | 0 | 0
Total Loans | 2,889 | 3,230
Residential | Residential |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 106,698 | 131,004
One year before current fiscal year | 131,170 | 186,794
Two years before current fiscal year | 172,922 | 256,456
Three years before current fiscal year | 240,044 | 222,931
Four years before current fiscal year | 205,258 | 110,477
Prior | 510,554 | 465,613
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | 1,366,646 | 1,373,275
Current-period gross writeoffs |  |
2024 | 0 | 0
2023 | 0 | 0
2022 | 0 | 0
2021 | 0 | 0
2020 | 0 | 0
Prior | 0 | 0
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | 0 | 0
Residential | Residential | Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 106,698 | 131,004
One year before current fiscal year | 130,463 | 186,401
Two years before current fiscal year | 172,310 | 256,127
Three years before current fiscal year | 239,307 | 221,945
Four years before current fiscal year | 204,310 | 109,594
Prior | 500,169 | 456,167
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | 1,353,257 | 1,361,238
Residential | Residential | Nonperforming |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 0 | 0
One year before current fiscal year | 707 | 393
Two years before current fiscal year | 612 | 329
Three years before current fiscal year | 737 | 986
Four years before current fiscal year | 948 | 883
Prior | 10,385 | 9,446
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | 13,389 | 12,037
Consumer and other | Direct |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 40,812 | 50,297
One year before current fiscal year | 18,086 | 13,327
Two years before current fiscal year | 10,046 | 11,316
Three years before current fiscal year | 9,117 | 5,157
Four years before current fiscal year | 3,957 | 4,107
Prior | 11,562 | 10,014
Revolving Loans Amortized Cost Basis | 2,583 | 2,724
Revolving Loans Converted to Term | 0 | 0
Total Loans | 96,163 | 96,942
Current-period gross writeoffs |  |
2024 | 2,272 | 801
2023 | 15 | 29
2022 | 11 | 16
2021 | 32 | 21
2020 | 10 | 83
Prior | 229 | 28
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | 2,569 | 978
Consumer and other | Direct | Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 40,812 | 50,295
One year before current fiscal year | 18,082 | 13,327
Two years before current fiscal year | 10,022 | 11,316
Three years before current fiscal year | 9,109 | 5,157
Four years before current fiscal year | 3,953 | 4,037
Prior | 11,485 | 9,857
Revolving Loans Amortized Cost Basis | 2,575 | 2,723
Revolving Loans Converted to Term | 0 | 0
Total Loans | 96,038 | 96,712
Consumer and other | Direct | Nonperforming |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 0 | 2
One year before current fiscal year | 4 | 0
Two years before current fiscal year | 24 | 0
Three years before current fiscal year | 8 | 0
Four years before current fiscal year | 4 | 70
Prior | 77 | 157
Revolving Loans Amortized Cost Basis | 8 | 1
Revolving Loans Converted to Term | 0 | 0
Total Loans | 125 | 230
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 | 97
Three years before current fiscal year | 52 | 68
Four years before current fiscal year | 23 | 432
Prior | 154 | 244
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | 229 | 841
Current-period gross writeoffs |  |
2024 | 0 | 0
2023 | 0 | 0
2022 | 0 | 0
2021 | 0 | 0
2020 | 0 | 53
Prior | 29 | 14
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | 29 | 67
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 | 97
Three years before current fiscal year | 52 | 68
Four years before current fiscal year | 23 | 402
Prior | 141 | 234
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | 216 | 801
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 | 30
Prior | 13 | 10
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | $ 13 | $ 40

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