Loans, Amortized Cost Basis of Collateral-Dependent Nonaccrual Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022
Amortized Cost Basis of Collateral-Dependent Nonaccrual Loans [Abstract]
Financing Receivable, Nonaccrual	$ 10,404	$ 6,938	$ 10,404
Real Estate [Member]
Amortized Cost Basis of Collateral-Dependent Nonaccrual Loans [Abstract]
Financing Receivable, Nonaccrual		6,591	8,363
Other [Member]
Amortized Cost Basis of Collateral-Dependent Nonaccrual Loans [Abstract]
Financing Receivable, Nonaccrual		347	2,041
Real Estate Loans [Member] | Mortgages [Member]
Amortized Cost Basis of Collateral-Dependent Nonaccrual Loans [Abstract]
Financing Receivable, Nonaccrual		562	448
Real Estate Loans [Member] | Mortgages [Member] | Real Estate [Member]
Amortized Cost Basis of Collateral-Dependent Nonaccrual Loans [Abstract]
Financing Receivable, Nonaccrual		562	448
Real Estate Loans [Member] | Mortgages [Member] | Other [Member]
Amortized Cost Basis of Collateral-Dependent Nonaccrual Loans [Abstract]
Financing Receivable, Nonaccrual		0	0
Real Estate Loans [Member] | Home Equity [Member]
Amortized Cost Basis of Collateral-Dependent Nonaccrual Loans [Abstract]
Financing Receivable, Nonaccrual		29	66
Real Estate Loans [Member] | Home Equity [Member] | Real Estate [Member]
Amortized Cost Basis of Collateral-Dependent Nonaccrual Loans [Abstract]
Financing Receivable, Nonaccrual		29	66
Real Estate Loans [Member] | Home Equity [Member] | Other [Member]
Amortized Cost Basis of Collateral-Dependent Nonaccrual Loans [Abstract]
Financing Receivable, Nonaccrual		0	0
Real Estate Loans [Member] | Commercial [Member]
Amortized Cost Basis of Collateral-Dependent Nonaccrual Loans [Abstract]
Financing Receivable, Nonaccrual		2,778	2,423
Real Estate Loans [Member] | Commercial [Member] | Real Estate [Member]
Amortized Cost Basis of Collateral-Dependent Nonaccrual Loans [Abstract]
Financing Receivable, Nonaccrual		2,778	2,423
Real Estate Loans [Member] | Commercial [Member] | Other [Member]
Amortized Cost Basis of Collateral-Dependent Nonaccrual Loans [Abstract]
Financing Receivable, Nonaccrual		0	0
Real Estate Loans [Member] | Agricultural [Member]
Amortized Cost Basis of Collateral-Dependent Nonaccrual Loans [Abstract]
Financing Receivable, Nonaccrual		3,222	3,069
Real Estate Loans [Member] | Agricultural [Member] | Real Estate [Member]
Amortized Cost Basis of Collateral-Dependent Nonaccrual Loans [Abstract]
Financing Receivable, Nonaccrual		3,222	3,069
Real Estate Loans [Member] | Agricultural [Member] | Other [Member]
Amortized Cost Basis of Collateral-Dependent Nonaccrual Loans [Abstract]
Financing Receivable, Nonaccrual		0	0
Real Estate Loans [Member] | Construction [Member]
Amortized Cost Basis of Collateral-Dependent Nonaccrual Loans [Abstract]
Financing Receivable, Nonaccrual		0	2,357
Real Estate Loans [Member] | Construction [Member] | Real Estate [Member]
Amortized Cost Basis of Collateral-Dependent Nonaccrual Loans [Abstract]
Financing Receivable, Nonaccrual		0	2,357
Real Estate Loans [Member] | Construction [Member] | Other [Member]
Amortized Cost Basis of Collateral-Dependent Nonaccrual Loans [Abstract]
Financing Receivable, Nonaccrual		0	0
Consumer [Member]
Amortized Cost Basis of Collateral-Dependent Nonaccrual Loans [Abstract]
Financing Receivable, Nonaccrual		0	0
Consumer [Member] | Real Estate [Member]
Amortized Cost Basis of Collateral-Dependent Nonaccrual Loans [Abstract]
Financing Receivable, Nonaccrual		0	0
Consumer [Member] | Other [Member]
Amortized Cost Basis of Collateral-Dependent Nonaccrual Loans [Abstract]
Financing Receivable, Nonaccrual		0	0
Other Commercial Loans [Member]
Amortized Cost Basis of Collateral-Dependent Nonaccrual Loans [Abstract]
Financing Receivable, Nonaccrual		62	1,708
Other Commercial Loans [Member] | Real Estate [Member]
Amortized Cost Basis of Collateral-Dependent Nonaccrual Loans [Abstract]
Financing Receivable, Nonaccrual		0	0
Other Commercial Loans [Member] | Other [Member]
Amortized Cost Basis of Collateral-Dependent Nonaccrual Loans [Abstract]
Financing Receivable, Nonaccrual		62	1,708
Other Agricultural Loans [Member]
Amortized Cost Basis of Collateral-Dependent Nonaccrual Loans [Abstract]
Financing Receivable, Nonaccrual		285	333
Other Agricultural Loans [Member] | Real Estate [Member]
Amortized Cost Basis of Collateral-Dependent Nonaccrual Loans [Abstract]
Financing Receivable, Nonaccrual		0	0
Other Agricultural Loans [Member] | Other [Member]
Amortized Cost Basis of Collateral-Dependent Nonaccrual Loans [Abstract]
Financing Receivable, Nonaccrual		285	333
State and Political Subdivision Loans [Member]
Amortized Cost Basis of Collateral-Dependent Nonaccrual Loans [Abstract]
Financing Receivable, Nonaccrual		0	0
State and Political Subdivision Loans [Member] | Real Estate [Member]
Amortized Cost Basis of Collateral-Dependent Nonaccrual Loans [Abstract]
Financing Receivable, Nonaccrual		0	0
State and Political Subdivision Loans [Member] | Other [Member]
Amortized Cost Basis of Collateral-Dependent Nonaccrual Loans [Abstract]
Financing Receivable, Nonaccrual		$ 0	$ 0