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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