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