Loans - Components of Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 3,656,034	$ 3,007,926
Less: Unearned Income	(3,582)	(3,662)
Allowance for Credit Losses	(45,078)	(37,017)	$ (45,099)	$ (46,859)
Loans, Net	3,607,374	2,967,247
Commercial and Industrial Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	580,819	493,005
Allowance for Credit Losses	(12,720)	(9,554)	(6,248)	(6,445)
Commercial Real Estate Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	1,938,528	1,530,677
Allowance for Credit Losses	(23,217)	(19,245)	(28,540)	(29,878)
Agricultural Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	387,764	358,150
Allowance for Credit Losses	(4,759)	(4,505)	(6,462)	(6,756)
Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	55,700	55,345
Allowance for Credit Losses	(196)	(200)	(201)	(200)
Home Equity Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	249,024	222,525
Allowance for Credit Losses	(1,207)	(1,061)	(965)	(996)
Consumer Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	86,522	70,302
Allowance for Credit Losses	(616)	(507)	(439)	(490)
Credit Cards
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	15,537	14,357
Allowance for Credit Losses	(212)	(240)	(162)	(150)
Residential Mortgage Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	342,140	263,565
Allowance for Credit Losses	(2,151)	(1,705)	$ (2,082)	$ (1,944)
Commercial: | Commercial and Industrial Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	580,819	493,005
Commercial: | Commercial Real Estate Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	1,938,528	1,530,677
Commercial: | Agricultural Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	387,764	358,150
Commercial: | Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	55,700	55,345
Retail: | Home Equity Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	249,024	222,525
Retail: | Consumer Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	86,522	70,302
Retail: | Credit Cards
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	15,537	14,357
Retail: | Residential Mortgage Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 342,140	$ 263,565