Loans (Non-accrual and Past Due Loans) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Non-Accrual With No Allowance for Credit Loss	$ 3,852
Non-Accrual	16,183	$ 13,802
Loans Past Due Over 89 Days Still Accruing	2,948	190
Commercial and Industrial Loans
Financing Receivable, Past Due [Line Items]
Non-Accrual With No Allowance for Credit Loss	61
Non-Accrual	7,194
Loans Past Due Over 89 Days Still Accruing	354
Commercial Real Estate Loans
Financing Receivable, Past Due [Line Items]
Non-Accrual With No Allowance for Credit Loss	259
Non-Accrual	4,540	3,433
Loans Past Due Over 89 Days Still Accruing	0	0
Agricultural Loans
Financing Receivable, Past Due [Line Items]
Non-Accrual With No Allowance for Credit Loss	2,082
Non-Accrual	2,715	2,739
Loans Past Due Over 89 Days Still Accruing	2,594	0
Leases
Financing Receivable, Past Due [Line Items]
Non-Accrual With No Allowance for Credit Loss	0
Non-Accrual	0
Loans Past Due Over 89 Days Still Accruing	0
Home Equity Loans
Financing Receivable, Past Due [Line Items]
Non-Accrual With No Allowance for Credit Loss	209
Non-Accrual	258	79
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	62
Non-Accrual	114	115
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	191
Non-Accrual	191
Loans Past Due Over 89 Days Still Accruing	0
Residential Mortgage Loans
Financing Receivable, Past Due [Line Items]
Non-Accrual With No Allowance for Credit Loss	988
Non-Accrual	1,171	2,496
Loans Past Due Over 89 Days Still Accruing	$ 0	$ 0