Loans (Recorded Investment in Non-accrual Loans and Loans Past Due 90 days or More Still Accruing) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Non-Accrual	$ 21,507	$ 13,802
Loans Past Due Over 89 Days Still Accruing	0	190
Loans Acquired in Current Year
Financing Receivable, Past Due [Line Items]
Non-Accrual		2,058
Loans Past Due Over 89 Days Still Accruing		0
Acquired with Deteriorated Credit Quality
Financing Receivable, Past Due [Line Items]
Non-Accrual		5,393
Loans Past Due Over 89 Days Still Accruing		0
Commercial and Industrial Loans and Leases
Financing Receivable, Past Due [Line Items]
Non-Accrual		4,940
Loans Past Due Over 89 Days Still Accruing		190
Commercial Real Estate Loans
Financing Receivable, Past Due [Line Items]
Non-Accrual	10,188	3,433
Loans Past Due Over 89 Days Still Accruing	0	0
Agricultural Loans
Financing Receivable, Past Due [Line Items]
Non-Accrual	1,915	2,739
Loans Past Due Over 89 Days Still Accruing	0	0
Home Equity Loans
Financing Receivable, Past Due [Line Items]
Non-Accrual	271	79
Loans Past Due Over 89 Days Still Accruing	0	0
Consumer Loans
Financing Receivable, Past Due [Line Items]
Non-Accrual	84	115
Loans Past Due Over 89 Days Still Accruing	0	0
Residential Mortgage Loans
Financing Receivable, Past Due [Line Items]
Non-Accrual	830	2,496
Loans Past Due Over 89 Days Still Accruing	$ 0	$ 0