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Loans - Aging of Past Due Loans (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Total | $ 3,893,573 | $ 3,788,645
Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 24,375 | 25,122
30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 11,227 | 10,633
60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 2,021 | 3,706
Greater Than 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 11,127 | 10,783
Loans Not Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 3,869,198 | 3,763,523
Commercial and Industrial Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 598,893 | 620,106
Commercial and Industrial Loans | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 8,276 | 9,234
Commercial and Industrial Loans | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 454 | 268
Commercial and Industrial Loans | 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total |  | 681
Commercial and Industrial Loans | Greater Than 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 7,822 | 8,285
Commercial and Industrial Loans | Loans Not Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 590,617 | 610,872
Commercial Real Estate Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 2,076,962 | 1,966,884
Commercial Real Estate Loans | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 1,783 | 2,247
Commercial Real Estate Loans | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 387 | 1,617
Commercial Real Estate Loans | 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 384 | 14
Commercial Real Estate Loans | Greater Than 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 1,012 | 616
Commercial Real Estate Loans | Loans Not Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 2,075,179 | 1,964,637
Agricultural Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 398,109 | 417,413
Agricultural Loans | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 976 | 466
Agricultural Loans | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 337 | 343
Agricultural Loans | 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 0 | 0
Agricultural Loans | Greater Than 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 639 | 123
Agricultural Loans | Loans Not Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 397,133 | 416,947
Leases |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 66,999 | 56,396
Leases | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 0 | 0
Leases | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 0 | 0
Leases | 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 0 | 0
Leases | Greater Than 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 0 | 0
Leases | Loans Not Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 66,999 | 56,396
Home Equity Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 286,880 | 279,748
Home Equity Loans | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 2,296 | 2,220
Home Equity Loans | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 1,460 | 1,770
Home Equity Loans | 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 215 | 140
Home Equity Loans | Greater Than 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 621 | 310
Home Equity Loans | Loans Not Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 284,584 | 277,528
Consumer Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 88,976 | 79,904
Consumer Loans | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 320 | 535
Consumer Loans | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 269 | 219
Consumer Loans | 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 19 | 64
Consumer Loans | Greater Than 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 32 | 252
Consumer Loans | Loans Not Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 88,656 | 79,369
Credit Cards |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 20,144 | 17,512
Credit Cards | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 291 | 256
Credit Cards | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 87 | 86
Credit Cards | 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 58 | 24
Credit Cards | Greater Than 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 146 | 146
Credit Cards | Loans Not Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 19,853 | 17,256
Residential Mortgage Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 356,610 | 350,682
Residential Mortgage Loans | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 10,433 | 10,164
Residential Mortgage Loans | 30-59 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 8,233 | 6,330
Residential Mortgage Loans | 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 1,345 | 2,783
Residential Mortgage Loans | Greater Than 89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 855 | 1,051
Residential Mortgage Loans | Loans Not Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total | $ 346,177 | $ 340,518

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