Loans - Non-Accrual and Past Due Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable, Past Due [Line Items]
Non-accrual with no allowance for credit losses	$ 6,450	$ 5,882
Non-Accrual	10,934	9,136
Loans Past Due Over 89 Days Still Accruing	188	55
Commercial and Industrial Loans
Financing Receivable, Past Due [Line Items]
Non-accrual with no allowance for credit losses	1,346	1,864
Non-Accrual	5,018	3,707
Loans Past Due Over 89 Days Still Accruing	0	0
Commercial Real Estate Loans
Financing Receivable, Past Due [Line Items]
Non-accrual with no allowance for credit losses	1,268	942
Non-Accrual	1,745	1,889
Loans Past Due Over 89 Days Still Accruing	183	55
Agricultural Loans
Financing Receivable, Past Due [Line Items]
Non-accrual with no allowance for credit losses	655	665
Non-Accrual	765	879
Loans Past Due Over 89 Days Still Accruing	5	0
Leases
Financing Receivable, Past Due [Line Items]
Non-accrual with no allowance for credit losses	0	0
Non-Accrual	0	0
Loans Past Due Over 89 Days Still Accruing	0	0
Home Equity Loans
Financing Receivable, Past Due [Line Items]
Non-accrual with no allowance for credit losses	1,087	1,033
Non-Accrual	1,087	1,033
Loans Past Due Over 89 Days Still Accruing	0	0
Consumer Loans
Financing Receivable, Past Due [Line Items]
Non-accrual with no allowance for credit losses	63	111
Non-Accrual	63	111
Loans Past Due Over 89 Days Still Accruing	0	0
Credit Cards
Financing Receivable, Past Due [Line Items]
Non-accrual with no allowance for credit losses	54	142
Non-Accrual	54	142
Loans Past Due Over 89 Days Still Accruing	0	0
Residential Mortgage Loans
Financing Receivable, Past Due [Line Items]
Non-accrual with no allowance for credit losses	1,977	1,125
Non-Accrual	2,202	1,375
Loans Past Due Over 89 Days Still Accruing	$ 0	$ 0