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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, 2023 | Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Loans | $ 5,605,935 | $ 5,268,911
Commercial and industrial | Other Financing Receivable |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 131,908 | 124,190
One year before current fiscal year | 92,577 | 80,099
Two years before current fiscal year | 68,330 | 39,021
Three years before current fiscal year | 28,808 | 41,711
Four years before current fiscal year | 33,715 | 34,242
Prior | 145,878 | 157,921
Revolving Loans Amortized Cost Basis | 215,611 | 222,050
Revolving Loans Converted to Term | 5,063 | 6,466
Total Loans | 721,890 | 705,700
Current-period gross writeoffs |  |
2023 | 6 |
2022 | 0 |
2021 | 0 |
2020 | 0 |
2019 | 0 |
Prior | 29 |
Revolving Loans Amortized Cost Basis | 0 |
Revolving Loans Converted to Term | 0 |
Total Loans | 35 |
Commercial and industrial | Other Financing Receivable | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 130,993 | 124,190
One year before current fiscal year | 92,335 | 79,861
Two years before current fiscal year | 68,030 | 38,158
Three years before current fiscal year | 28,237 | 41,391
Four years before current fiscal year | 33,618 | 33,238
Prior | 141,758 | 156,038
Revolving Loans Amortized Cost Basis | 212,349 | 215,890
Revolving Loans Converted to Term | 5,063 | 6,466
Total Loans | 712,383 | 695,232
Commercial and industrial | Other Financing Receivable | Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 915 | 0
One year before current fiscal year | 196 | 127
Two years before current fiscal year | 222 | 421
Three years before current fiscal year | 242 | 285
Four years before current fiscal year | 79 | 271
Prior | 1,287 | 1,380
Revolving Loans Amortized Cost Basis | 682 | 501
Revolving Loans Converted to Term | 0 | 0
Total Loans | 3,623 | 2,985
Commercial and industrial | Other Financing Receivable | Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 0 | 0
One year before current fiscal year | 46 | 111
Two years before current fiscal year | 78 | 442
Three years before current fiscal year | 329 | 35
Four years before current fiscal year | 18 | 733
Prior | 2,833 | 503
Revolving Loans Amortized Cost Basis | 2,580 | 5,659
Revolving Loans Converted to Term | 0 | 0
Total Loans | 5,884 | 7,483
Commercial and industrial | PPP loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 0 | 16,694
One year before current fiscal year | 0 | 4,178
Two years before current fiscal year | 264 | 5,015
Three years before current fiscal year | 140 | 4,186
Four years before current fiscal year | 0 | 7,734
Prior | 0 | 4,899
Revolving Loans Amortized Cost Basis | 0 | 42,152
Revolving Loans Converted to Term | 0 | 215
Total Loans | 404 | 85,073
Current-period gross writeoffs |  |
2023 | 0 |
2022 | 0 |
2021 | 0 |
2020 | 0 |
2019 | 0 |
Prior | 0 |
Revolving Loans Amortized Cost Basis | 0 |
Revolving Loans Converted to Term | 0 |
Total Loans | 0 |
Commercial and industrial | PPP loans | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 0 | 16,694
One year before current fiscal year | 0 | 4,120
Two years before current fiscal year | 264 | 4,944
Three years before current fiscal year | 140 | 4,186
Four years before current fiscal year | 0 | 7,734
Prior | 0 | 4,883
Revolving Loans Amortized Cost Basis | 0 | 42,097
Revolving Loans Converted to Term | 0 | 215
Total Loans | 404 | 84,873
Commercial and industrial | PPP loans | Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 0 | 0
One year before current fiscal year | 0 | 58
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 | 50
Revolving Loans Converted to Term | 0 | 0
Total Loans | 0 | 108
Commercial and industrial | PPP loans | 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 | 71
Three years before current fiscal year | 0 | 0
Four years before current fiscal year | 0 | 0
Prior | 0 | 16
Revolving Loans Amortized Cost Basis | 0 | 5
Revolving Loans Converted to Term | 0 | 0
Total Loans | 0 | 92
Commercial and industrial | Agriculture |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 24,924 | 0
One year before current fiscal year | 11,935 | 416
Two years before current fiscal year | 3,388 | 340
Three years before current fiscal year | 3,170 | 0
Four years before current fiscal year | 3,268 | 0
Prior | 16,767 | 0
Revolving Loans Amortized Cost Basis | 36,729 | 0
Revolving Loans Converted to Term | 1,030 | 0
Total Loans | 101,211 | 756
Current-period gross writeoffs |  |
2023 | 0 |
2022 | 0 |
2021 | 0 |
2020 | 0 |
2019 | 0 |
Prior | 0 |
Revolving Loans Amortized Cost Basis | 0 |
Revolving Loans Converted to Term | 0 |
Total Loans | 0 |
Commercial and industrial | Agriculture | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 24,924 | 0
One year before current fiscal year | 11,935 | 416
Two years before current fiscal year | 3,341 | 340
Three years before current fiscal year | 3,114 | 0
Four years before current fiscal year | 3,268 | 0
Prior | 16,759 | 0
Revolving Loans Amortized Cost Basis | 36,728 | 0
Revolving Loans Converted to Term | 1,030 | 0
Total Loans | 101,099 | 756
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 | 47 | 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 | 47 | 0
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 | 56 | 0
Four years before current fiscal year | 0 | 0
Prior | 8 | 0
Revolving Loans Amortized Cost Basis | 1 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | 65 | 0
Commercial real estate | Other Financing Receivable |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 246,016 | 343,032
One year before current fiscal year | 333,515 | 370,620
Two years before current fiscal year | 368,103 | 313,295
Three years before current fiscal year | 310,093 | 294,443
Four years before current fiscal year | 286,203 | 207,263
Prior | 983,010 | 873,145
Revolving Loans Amortized Cost Basis | 35,702 | 11,038
Revolving Loans Converted to Term | 24,949 | 24,503
Total Loans | 2,587,591 | 2,437,339
Current-period gross writeoffs |  |
2023 | 0 |
2022 | 0 |
2021 | 0 |
2020 | 0 |
2019 | 0 |
Prior | 0 |
Revolving Loans Amortized Cost Basis | 0 |
Revolving Loans Converted to Term | 0 |
Total Loans | 0 |
Commercial real estate | Other Financing Receivable | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 246,016 | 342,311
One year before current fiscal year | 317,583 | 367,104
Two years before current fiscal year | 365,975 | 311,607
Three years before current fiscal year | 292,960 | 279,587
Four years before current fiscal year | 272,722 | 203,016
Prior | 921,201 | 812,563
Revolving Loans Amortized Cost Basis | 34,346 | 10,906
Revolving Loans Converted to Term | 24,949 | 24,503
Total Loans | 2,475,752 | 2,351,597
Commercial real estate | Other Financing Receivable | Special Mention |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 0 | 643
One year before current fiscal year | 632 | 3,406
Two years before current fiscal year | 0 | 1,688
Three years before current fiscal year | 17,133 | 11,462
Four years before current fiscal year | 11,422 | 2,555
Prior | 16,100 | 25,361
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | 45,287 | 45,115
Commercial real estate | Other Financing Receivable | Substandard |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 0 | 78
One year before current fiscal year | 15,300 | 110
Two years before current fiscal year | 2,128 | 0
Three years before current fiscal year | 0 | 3,394
Four years before current fiscal year | 2,059 | 1,692
Prior | 45,709 | 35,221
Revolving Loans Amortized Cost Basis | 1,356 | 132
Revolving Loans Converted to Term | 0 | 0
Total Loans | 66,552 | 40,627
Commercial real estate | Agriculture |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 14,668 | 33,241
One year before current fiscal year | 37,256 | 24,125
Two years before current fiscal year | 22,813 | 22,831
Three years before current fiscal year | 21,001 | 26,163
Four years before current fiscal year | 24,342 | 37,873
Prior | 94,969 | 66,364
Revolving Loans Amortized Cost Basis | 257 | 3,131
Revolving Loans Converted to Term | 6,364 | 1,235
Total Loans | 221,670 | 214,963
Current-period gross writeoffs |  |
2023 | 0 |
2022 | 0 |
2021 | 0 |
2020 | 0 |
2019 | 0 |
Prior | 0 |
Revolving Loans Amortized Cost Basis | 0 |
Revolving Loans Converted to Term | 0 |
Total Loans | 0 |
Commercial real estate | Agriculture | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 14,668 | 33,241
One year before current fiscal year | 37,256 | 24,125
Two years before current fiscal year | 22,813 | 22,831
Three years before current fiscal year | 21,001 | 25,576
Four years before current fiscal year | 23,794 | 37,835
Prior | 93,890 | 65,112
Revolving Loans Amortized Cost Basis | 257 | 3,131
Revolving Loans Converted to Term | 6,364 | 1,235
Total Loans | 220,043 | 213,086
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 | 401
Four years before current fiscal year | 378 | 0
Prior | 1,033 | 1,142
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | 1,411 | 1,543
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 | 186
Four years before current fiscal year | 170 | 38
Prior | 46 | 110
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | 216 | 334
Commercial real estate | Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 9,265 | 23,105
One year before current fiscal year | 2,793 | 75,245
Two years before current fiscal year | 8,068 | 27,584
Three years before current fiscal year | 2,501 | 14,842
Four years before current fiscal year | 357 | 9,083
Prior | 596 | 7,268
Revolving Loans Amortized Cost Basis | 274,224 | 42,701
Revolving Loans Converted to Term | 5,602 | 1,288
Total Loans | 303,406 | 201,116
Current-period gross writeoffs |  |
2023 | 0 |
2022 | 0 |
2021 | 0 |
2020 | 0 |
2019 | 0 |
Prior | 0 |
Revolving Loans Amortized Cost Basis | 0 |
Revolving Loans Converted to Term | 0 |
Total Loans | 0 |
Commercial real estate | Construction | Pass |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 9,265 | 23,105
One year before current fiscal year | 2,793 | 75,245
Two years before current fiscal year | 8,068 | 27,584
Three years before current fiscal year | 2,501 | 14,842
Four years before current fiscal year | 357 | 9,083
Prior | 596 | 7,268
Revolving Loans Amortized Cost Basis | 274,224 | 42,701
Revolving Loans Converted to Term | 5,602 | 1,288
Total Loans | 303,406 | 201,116
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 | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | 0 | 0
Residential | Home equity |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 2,378 | 3,030
One year before current fiscal year | 2,237 | 1,062
Two years before current fiscal year | 890 | 637
Three years before current fiscal year | 529 | 1,006
Four years before current fiscal year | 832 | 792
Prior | 8,515 | 3,208
Revolving Loans Amortized Cost Basis | 167,098 | 177,803
Revolving Loans Converted to Term | 5,837 | 1,085
Total Loans | 188,316 | 188,623
Current-period gross writeoffs |  |
2023 | 0 |
2022 | 0 |
2021 | 0 |
2020 | 0 |
2019 | 0 |
Prior | 20 |
Revolving Loans Amortized Cost Basis | 0 |
Revolving Loans Converted to Term | 0 |
Total Loans | 20 |
Residential | Home equity | Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 2,378 | 3,030
One year before current fiscal year | 2,237 | 1,062
Two years before current fiscal year | 890 | 637
Three years before current fiscal year | 529 | 992
Four years before current fiscal year | 832 | 792
Prior | 8,178 | 3,183
Revolving Loans Amortized Cost Basis | 164,205 | 175,451
Revolving Loans Converted to Term | 5,837 | 1,085
Total Loans | 185,086 | 186,232
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 | 14
Four years before current fiscal year | 0 | 0
Prior | 337 | 25
Revolving Loans Amortized Cost Basis | 2,893 | 2,352
Revolving Loans Converted to Term | 0 | 0
Total Loans | 3,230 | 2,391
Residential | Mortgages |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 131,004 | 187,347
One year before current fiscal year | 186,794 | 272,570
Two years before current fiscal year | 256,456 | 240,212
Three years before current fiscal year | 222,931 | 118,073
Four years before current fiscal year | 110,477 | 68,157
Prior | 465,613 | 459,959
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | 1,373,275 | 1,346,318
Current-period gross writeoffs |  |
2023 | 0 |
2022 | 0 |
2021 | 0 |
2020 | 0 |
2019 | 0 |
Prior | 0 |
Revolving Loans Amortized Cost Basis | 0 |
Revolving Loans Converted to Term | 0 |
Total Loans | 0 |
Residential | Mortgages | Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 131,004 | 187,129
One year before current fiscal year | 186,401 | 272,235
Two years before current fiscal year | 256,127 | 239,584
Three years before current fiscal year | 221,945 | 117,391
Four years before current fiscal year | 109,594 | 66,605
Prior | 456,167 | 452,221
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | 1,361,238 | 1,335,165
Residential | Mortgages | Nonperforming |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 0 | 218
One year before current fiscal year | 393 | 335
Two years before current fiscal year | 329 | 628
Three years before current fiscal year | 986 | 682
Four years before current fiscal year | 883 | 1,552
Prior | 9,446 | 7,738
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | 12,037 | 11,153
Consumer and Other | Direct |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 50,297 | 31,243
One year before current fiscal year | 13,327 | 13,999
Two years before current fiscal year | 11,316 | 7,375
Three years before current fiscal year | 5,157 | 6,231
Four years before current fiscal year | 4,107 | 4,462
Prior | 10,014 | 8,029
Revolving Loans Amortized Cost Basis | 2,724 | 4,073
Revolving Loans Converted to Term | 0 | 0
Total Loans | 96,942 | 75,412
Current-period gross writeoffs |  |
2023 | 801 |
2022 | 29 |
2021 | 16 |
2020 | 21 |
2019 | 83 |
Prior | 28 |
Revolving Loans Amortized Cost Basis | 0 |
Revolving Loans Converted to Term | 0 |
Total Loans | 978 |
Consumer and Other | Direct | Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 50,295 | 31,243
One year before current fiscal year | 13,327 | 13,999
Two years before current fiscal year | 11,316 | 7,372
Three years before current fiscal year | 5,157 | 6,138
Four years before current fiscal year | 4,037 | 4,386
Prior | 9,857 | 8,029
Revolving Loans Amortized Cost Basis | 2,723 | 4,070
Revolving Loans Converted to Term | 0 | 0
Total Loans | 96,712 | 75,237
Consumer and Other | Direct | Nonperforming |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 2 | 0
One year before current fiscal year | 0 | 0
Two years before current fiscal year | 0 | 3
Three years before current fiscal year | 0 | 93
Four years before current fiscal year | 70 | 76
Prior | 157 | 0
Revolving Loans Amortized Cost Basis | 1 | 3
Revolving Loans Converted to Term | 0 | 0
Total Loans | 230 | 175
Consumer and Other | Indirect |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Current fiscal year | 0 | 0
One year before current fiscal year | 0 | 156
Two years before current fiscal year | 97 | 146
Three years before current fiscal year | 68 | 1,168
Four years before current fiscal year | 432 | 645
Prior | 244 | 109
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | 841 | 2,224
Current-period gross writeoffs |  |
2023 | 0 |
2022 | 0 |
2021 | 0 |
2020 | 0 |
2019 | 53 |
Prior | 14 |
Revolving Loans Amortized Cost Basis | 0 |
Revolving Loans Converted to Term | 0 |
Total Loans | 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 | 156
Two years before current fiscal year | 97 | 146
Three years before current fiscal year | 68 | 1,092
Four years before current fiscal year | 402 | 635
Prior | 234 | 101
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | 801 | 2,130
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 | 76
Four years before current fiscal year | 30 | 10
Prior | 10 | 8
Revolving Loans Amortized Cost Basis | 0 | 0
Revolving Loans Converted to Term | 0 | 0
Total Loans | $ 40 | $ 94

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