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Loans - Amortized Cost Basis of Collateral-Dependent Loans and Leases (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Loans [Abstract]
Financing Receivable, Nonaccrual	$ 39,340	$ 25,832
Real Estate Loans [Member] | Mortgages [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	3,698	3,382
Real Estate Loans [Member] | Home Equity [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	595	61
Real Estate Loans [Member] | Commercial [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	22,935	11,497
Real Estate Loans [Member] | Agricultural [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	2,129	2,145
Real Estate Loans [Member] | Construction [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	1,227	516
Other Commercial Loans [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	8,258	7,828
Other Agricultural Loans [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	498	403
Real Estate [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	30,584	17,601
Real Estate [Member] | Real Estate Loans [Member] | Mortgages [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	3,698	3,382
Real Estate [Member] | Real Estate Loans [Member] | Home Equity [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	595	61
Real Estate [Member] | Real Estate Loans [Member] | Commercial [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	22,935	11,497
Real Estate [Member] | Real Estate Loans [Member] | Agricultural [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	2,129	2,145
Real Estate [Member] | Real Estate Loans [Member] | Construction [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	1,227	516
Real Estate [Member] | Other Commercial Loans [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	0	0
Real Estate [Member] | Other Agricultural Loans [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	0	0
Business Assets [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	8,756	8,231
Business Assets [Member] | Real Estate Loans [Member] | Mortgages [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	0	0
Business Assets [Member] | Real Estate Loans [Member] | Home Equity [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	0	0
Business Assets [Member] | Real Estate Loans [Member] | Commercial [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	0	0
Business Assets [Member] | Real Estate Loans [Member] | Agricultural [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	0	0
Business Assets [Member] | Real Estate Loans [Member] | Construction [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	0	0
Business Assets [Member] | Other Commercial Loans [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	8,258	7,828
Business Assets [Member] | Other Agricultural Loans [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	$ 498	$ 403

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