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Loans - Collateral-dependent Loans by Class (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | $ 3,893,573 | $ 3,788,645
Commercial and Industrial Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 598,893 | 620,106
Commercial Real Estate Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 2,076,962 | 1,966,884
Agricultural Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 398,109 | 417,413
Leases |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 66,999 | 56,396
Home Equity Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 286,880 | 279,748
Consumer Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 88,976 | 79,904
Credit Cards |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 20,144 | 17,512
Residential Mortgage Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 356,610 | 350,682
Total |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 23,502 | 28,459
Total | Commercial and Industrial Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 9,911 | 9,420
Total | Commercial Real Estate Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 8,367 | 12,228
Total | Agricultural Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 3,893 | 5,262
Total | Leases |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 0 | 0
Total | Home Equity Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 475 | 467
Total | Consumer Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 9 | 22
Total | Credit Cards |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 0 | 0
Total | Residential Mortgage Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 847 | 1,060
Real Estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 15,564 | 20,749
Real Estate | Commercial and Industrial Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 3,070 | 2,078
Real Estate | Commercial Real Estate Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 8,367 | 12,192
Real Estate | Agricultural Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 2,796 | 4,944
Real Estate | Leases |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 0 | 0
Real Estate | Home Equity Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 475 | 467
Real Estate | Consumer Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 9 | 8
Real Estate | Credit Cards |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 0 | 0
Real Estate | Residential Mortgage Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 847 | 1,060
Equipment |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 1,231 | 1,575
Equipment | Commercial and Industrial Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 134 | 1,219
Equipment | Commercial Real Estate Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 0 | 36
Equipment | Agricultural Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 1,097 | 318
Equipment | Leases |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 0 | 0
Equipment | Home Equity Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 0 | 0
Equipment | Consumer Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 0 | 2
Equipment | Credit Cards |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 0 | 0
Equipment | Residential Mortgage Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 0 | 0
Accounts Receivable |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 0 | 272
Accounts Receivable | Commercial and Industrial Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 0 | 272
Accounts Receivable | Commercial Real Estate Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 0 | 0
Accounts Receivable | Agricultural Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 0 | 0
Accounts Receivable | Leases |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 0 | 0
Accounts Receivable | Home Equity Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 0 | 0
Accounts Receivable | Consumer Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 0 | 0
Accounts Receivable | Credit Cards |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 0 | 0
Accounts Receivable | Residential Mortgage Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 0 | 0
Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 6,707 | 5,863
Other | Commercial and Industrial Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 6,707 | 5,851
Other | Commercial Real Estate Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 0 | 0
Other | Agricultural Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 0 | 0
Other | Leases |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 0 | 0
Other | Home Equity Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 0 | 0
Other | Consumer Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 0 | 12
Other | Credit Cards |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 0 | 0
Other | Residential Mortgage Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | $ 0 | $ 0

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