Loans - Non-Accrual and Past Due Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Non-Accrual With No Allowance For Credit Loss	$ 2,860	$ 3,509
Total Non-Accrual	11,206	12,888
Loans Past Due Over 89 Days Still Accruing	1,170	1,427
Commercial and Industrial Loans
Financing Receivable, Past Due [Line Items]
Non-Accrual With No Allowance For Credit Loss	554	1,142
Total Non-Accrual	7,298	7,936
Loans Past Due Over 89 Days Still Accruing	1,000	1,427
Commercial Real Estate Loans
Financing Receivable, Past Due [Line Items]
Non-Accrual With No Allowance For Credit Loss	137	49
Total Non-Accrual	1,006	1,950
Loans Past Due Over 89 Days Still Accruing	145	0
Agricultural Loans
Financing Receivable, Past Due [Line Items]
Non-Accrual With No Allowance For Credit Loss	698	994
Total Non-Accrual	1,036	1,062
Loans Past Due Over 89 Days Still Accruing	25	0
Leases
Financing Receivable, Past Due [Line Items]
Non-Accrual With No Allowance For Credit Loss	0	0
Total 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 Loss	567	262
Total Non-Accrual	621	310
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 Loss	32	240
Total Non-Accrual	32	254
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 Loss	146	146
Total Non-Accrual	146	146
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 Loss	726	676
Total Non-Accrual	1,067	1,230
Loans Past Due Over 89 Days Still Accruing	$ 0	$ 0