Loans - Collateral-dependent Loans by Class (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 5,884,448	$ 4,133,267
Commercial and Industrial Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	761,167	591,785
Commercial Real Estate Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	3,142,472	2,224,872
Agricultural Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	489,168	431,037
Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	87,073	79,253
Home Equity Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	484,300	344,808
Consumer Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	117,648	81,396
Credit Cards
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	28,067	22,668
Residential Mortgage Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	774,553	357,448
Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	43,034	17,012
Real Estate | Commercial and Industrial Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	8,348	5,986
Real Estate | Commercial Real Estate Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	30,670	7,293
Real Estate | Agricultural Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	2,958	2,777
Real Estate | Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Real Estate | Home Equity Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	425	423
Real Estate | Consumer Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	10
Real Estate | Credit Cards
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Real Estate | Residential Mortgage Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	633	523
Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	7,653	353
Equipment | Commercial and Industrial Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	6,880	90
Equipment | Commercial Real Estate Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	494	0
Equipment | Agricultural Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	279	263
Equipment | Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Equipment | Home Equity Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Equipment | Consumer Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Equipment | Credit Cards
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Equipment | Residential Mortgage Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Accounts Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	400	0
Accounts Receivable | Commercial and Industrial Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	400	0
Accounts Receivable | Commercial Real Estate Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Accounts Receivable | Agricultural Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Accounts Receivable | Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Accounts Receivable | Home Equity Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Accounts Receivable | Consumer Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Accounts Receivable | Credit Cards
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Accounts Receivable | Residential Mortgage Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	10,703	58
Other | Commercial and Industrial Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	10,070	58
Other | Commercial Real Estate Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Other | Agricultural Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	633	0
Other | Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Other | Home Equity Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Other | Consumer Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Other | Credit Cards
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Other | Residential Mortgage Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	61,790	17,423
Total | Commercial and Industrial Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	25,698	6,134
Total | Commercial Real Estate Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	31,164	7,293
Total | Agricultural Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	3,870	3,040
Total | Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Total | Home Equity Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	425	423
Total | Consumer Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	10
Total | Credit Cards
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	0	0
Total | Residential Mortgage Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans	$ 633	$ 523