Loans - Components of Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025	Mar. 31, 2025	Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 5,858,642	$ 5,884,448
Less: Unearned Income	(9,214)	(9,351)
Allowance for Credit Losses	(78,547)	(77,694)	$ (75,158)	$ (44,436)
Loans, Net	5,770,881	5,797,403
Commercial and Industrial Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	745,597	761,167
Allowance for Credit Losses	(18,676)	(19,576)	(15,343)	(7,059)
Commercial Real Estate Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	3,152,336	3,142,472
Allowance for Credit Losses	(42,150)	(40,626)	(37,811)	(25,818)
Agricultural Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	467,204	489,168
Allowance for Credit Losses	(3,244)	(3,324)	(5,306)	(4,917)
Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	87,336	87,073
Allowance for Credit Losses	(1,171)	(1,178)	(1,151)	(397)
Home Equity Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	500,696	484,300
Allowance for Credit Losses	(4,291)	(4,065)	(3,942)	(2,196)
Consumer Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	110,065	117,648
Allowance for Credit Losses	(655)	(687)	(657)	(727)
Credit Cards
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	27,519	28,067
Allowance for Credit Losses	(576)	(600)	(608)	(520)
Residential Mortgage Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	767,889	774,553
Allowance for Credit Losses	(7,784)	(7,638)	$ (10,340)	$ (2,802)
Commercial: | Commercial and Industrial Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	745,597	761,167
Commercial: | Commercial Real Estate Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	3,152,336	3,142,472
Commercial: | Agricultural Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	467,204	489,168
Commercial: | Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	87,336	87,073
Retail: | Home Equity Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	500,696	484,300
Retail: | Consumer Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	110,065	117,648
Retail: | Credit Cards
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	27,519	28,067
Retail: | Residential Mortgage Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans	$ 767,889	$ 774,553