Loans - Collateral-dependent Loans by Class (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 5,787,622	$ 4,133,267
Commercial and Industrial Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	730,134	591,785
Commercial Real Estate Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	3,103,181	2,224,872
Agricultural Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	472,807	431,037
Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	85,088	79,253
Home Equity Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	456,839	344,808
Consumer Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	119,642	81,396
Credit Cards
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	27,261	22,668
Residential Mortgage Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	792,670	357,448
Total
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	70,822	17,423
Total | Commercial and Industrial Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	27,327	6,134
Total | Commercial Real Estate Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	37,317	7,293
Total | Agricultural Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	4,286	3,040
Total | Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Total | Home Equity Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	424	423
Total | Consumer Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	20	10
Total | Credit Cards
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Total | Residential Mortgage Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,448	523
Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	52,172	17,012
Real Estate | Commercial and Industrial Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	10,038	5,986
Real Estate | Commercial Real Estate Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	36,815	7,293
Real Estate | Agricultural Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	3,437	2,777
Real Estate | Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Real Estate | Home Equity Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	424	423
Real Estate | Consumer Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	10	10
Real Estate | Credit Cards
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Real Estate | Residential Mortgage Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	1,448	523
Equipment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	7,827	353
Equipment | Commercial and Industrial Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	7,111	90
Equipment | Commercial Real Estate Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	502	0
Equipment | Agricultural Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	204	263
Equipment | Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Equipment | Home Equity Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Equipment | Consumer Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	10	0
Equipment | Credit Cards
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Equipment | Residential Mortgage Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Accounts Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Accounts Receivable | Commercial and Industrial Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Accounts Receivable | Commercial Real Estate Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Accounts Receivable | Agricultural Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Accounts Receivable | Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Accounts Receivable | Home Equity Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Accounts Receivable | Consumer Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Accounts Receivable | Credit Cards
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Accounts Receivable | Residential Mortgage Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	10,823	58
Other | Commercial and Industrial Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	10,178	58
Other | Commercial Real Estate Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Other | Agricultural Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	645	0
Other | Leases
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Other | Home Equity Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Other | Consumer Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Other | Credit Cards
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	0	0
Other | Residential Mortgage Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 0	$ 0