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Loans - Components of Loans (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Jun. 30, 2023 | Dec. 31, 2022 | Sep. 30, 2022 | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | --- | --- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans | $ 3,893,573 |  | $ 3,788,645 |  |  |
Less: Unearned Income | (6,023) |  | (3,711) |  |  |
Allowance for Credit Losses | (44,646) | $ (44,266) | (44,168) | $ (44,699) | $ (45,031) | $ (37,017)
Loans, Net | 3,842,904 |  | 3,740,766 |  |  |
Commercial and Industrial Loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans | 598,893 |  | 620,106 |  |  |
Allowance for Credit Losses | (12,958) | (13,567) | (13,749) | (13,455) | (13,545) | (9,554)
Commercial Real Estate Loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans | 2,076,962 |  | 1,966,884 |  |  |
Allowance for Credit Losses | (22,900) | (21,834) | (21,598) | (22,143) | (22,349) | (19,245)
Agricultural Loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans | 398,109 |  | 417,413 |  |  |
Allowance for Credit Losses | (3,786) | (3,956) | (4,188) | (4,529) | (4,628) | (4,505)
Leases |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans | 66,999 |  | 56,396 |  |  |
Allowance for Credit Losses | (254) | (235) | (209) | (218) | (191) | (200)
Home Equity Loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans | 286,880 |  | 279,748 |  |  |
Allowance for Credit Losses | (1,447) | (1,436) | (1,344) | (1,313) | (1,233) | (1,061)
Consumer Loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans | 88,976 |  | 79,904 |  |  |
Allowance for Credit Losses | (665) | (640) | (595) | (594) | (668) | (507)
Credit Cards |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans | 20,144 |  | 17,512 |  |  |
Allowance for Credit Losses | (319) | (288) | (257) | (236) | (239) | (240)
Residential Mortgage Loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans | 356,610 |  | 350,682 |  |  |
Allowance for Credit Losses | (2,317) | $ (2,310) | (2,228) | $ (2,211) | $ (2,178) | $ (1,705)
Commercial: | Commercial and Industrial Loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans | 598,893 |  | 620,106 |  |  |
Commercial: | Commercial Real Estate Loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans | 2,076,962 |  | 1,966,884 |  |  |
Commercial: | Agricultural Loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans | 398,109 |  | 417,413 |  |  |
Commercial: | Leases |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans | 66,999 |  | 56,396 |  |  |
Retail: | Home Equity Loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans | 286,880 |  | 279,748 |  |  |
Retail: | Consumer Loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans | 88,976 |  | 79,904 |  |  |
Retail: | Credit Cards |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans | 20,144 |  | 17,512 |  |  |
Retail: | Residential Mortgage Loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total Loans | $ 356,610 |  | $ 350,682 |  |  |

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