Loans - Amortized Cost Basis of Collateral-Dependent Loans and Leases (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Loans [Abstract]
Financing Receivable, Nonaccrual	$ 37,670	$ 26,602
Real Estate Loans [Member] | Mortgages [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	3,265	3,382
Real Estate Loans [Member] | Home Equity [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	635	61
Real Estate Loans [Member] | Commercial [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	21,887	11,497
Real Estate Loans [Member] | Agricultural [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	2,137	2,145
Real Estate Loans [Member] | Construction [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	503	516
Consumer [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	920	770
Other Commercial Loans [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	7,821	7,828
Other Agricultural Loans [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	502	403
Real Estate [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	28,427	17,601
Real Estate [Member] | Real Estate Loans [Member] | Mortgages [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	3,265	3,382
Real Estate [Member] | Real Estate Loans [Member] | Home Equity [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	635	61
Real Estate [Member] | Real Estate Loans [Member] | Commercial [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	21,887	11,497
Real Estate [Member] | Real Estate Loans [Member] | Agricultural [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	2,137	2,145
Real Estate [Member] | Real Estate Loans [Member] | Construction [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	503	516
Real Estate [Member] | Consumer [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	0	0
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	8,323	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] | Consumer [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	0	0
Business Assets [Member] | Other Commercial Loans [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	7,821	7,828
Business Assets [Member] | Other Agricultural Loans [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	502	403
None [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	920	770
None [Member] | Real Estate Loans [Member] | Mortgages [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	0	0
None [Member] | Real Estate Loans [Member] | Home Equity [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	0	0
None [Member] | Real Estate Loans [Member] | Commercial [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	0	0
None [Member] | Real Estate Loans [Member] | Agricultural [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	0	0
None [Member] | Real Estate Loans [Member] | Construction [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	0	0
None [Member] | Consumer [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	920	770
None [Member] | Other Commercial Loans [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	0	0
None [Member] | Other Agricultural Loans [Member]
Loans [Abstract]
Financing Receivable, Nonaccrual	$ 0	$ 0