Loans - Components of Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 3,652,743		$ 3,007,926
Less: Unearned Income	(3,374)		(3,662)
Allowance for Credit Losses	(45,031)	$ (45,078)	(37,017)	$ (39,995)	$ (45,099)	$ (46,859)
Loans, Net	3,604,338		2,967,247
Commercial and Industrial Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	587,460		493,005
Allowance for Credit Losses	(13,545)	(12,720)	(9,554)	(6,080)	(6,248)	(6,445)
Commercial Real Estate Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	1,904,235		1,530,677
Allowance for Credit Losses	(22,349)	(23,217)	(19,245)	(24,220)	(28,540)	(29,878)
Agricultural Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	397,524		358,150
Allowance for Credit Losses	(4,628)	(4,759)	(4,505)	(5,847)	(6,462)	(6,756)
Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	54,036		55,345
Allowance for Credit Losses	(191)	(196)	(200)	(204)	(201)	(200)
Home Equity Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	261,019		222,525
Allowance for Credit Losses	(1,233)	(1,207)	(1,061)	(908)	(965)	(996)
Consumer Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	89,230		70,302
Allowance for Credit Losses	(668)	(616)	(507)	(460)	(439)	(490)
Credit Cards
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	16,073		14,357
Allowance for Credit Losses	(239)	(212)	(240)	(181)	(162)	(150)
Residential Mortgage Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	343,166		263,565
Allowance for Credit Losses	(2,178)	$ (2,151)	(1,705)	$ (2,095)	$ (2,082)	$ (1,944)
Commercial: | Commercial and Industrial Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	587,460		493,005
Commercial: | Commercial Real Estate Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	1,904,235		1,530,677
Commercial: | Agricultural Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	397,524		358,150
Commercial: | Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	54,036		55,345
Retail: | Home Equity Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	261,019		222,525
Retail: | Consumer Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	89,230		70,302
Retail: | Credit Cards
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	16,073		14,357
Retail: | Residential Mortgage Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans	$ 343,166		$ 263,565