Loans (Schedule of Recorded Investment in Nonaccrual Loans) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Financing Receivable, Past Due [Line Items]
Non-Accrual Loans	$ 13,512	$ 12,579
Loans Past Due 90 Days or More & Still Accruing	0	642
Loans Acquired With Deteriorated Credit Quality
Financing Receivable, Past Due [Line Items]
Non-Accrual Loans	4,880	4,162
Loans Past Due 90 Days or More & Still Accruing	0	141
Loans Acquired With Deteriorated Credit Quality | Loans Acquired in Current Year
Financing Receivable, Past Due [Line Items]
Non-Accrual Loans	1,151	4,603
Loans Past Due 90 Days or More & Still Accruing	0	96
Commercial and Industrial Loans and Leases
Financing Receivable, Past Due [Line Items]
Non-Accrual Loans	6,229	2,430
Loans Past Due 90 Days or More & Still Accruing	0	0
Commercial Real Estate Loans
Financing Receivable, Past Due [Line Items]
Non-Accrual Loans	3,695	6,833
Loans Past Due 90 Days or More & Still Accruing	0	368
Agricultural Loans
Financing Receivable, Past Due [Line Items]
Non-Accrual Loans	2,226	1,449
Loans Past Due 90 Days or More & Still Accruing	0	274
Home Equity Loans
Financing Receivable, Past Due [Line Items]
Non-Accrual Loans	78	88
Loans Past Due 90 Days or More & Still Accruing	0	0
Consumer Loans
Financing Receivable, Past Due [Line Items]
Non-Accrual Loans	80	162
Loans Past Due 90 Days or More & Still Accruing	0	0
Residential Mortgage Loans
Financing Receivable, Past Due [Line Items]
Non-Accrual Loans	1,204	1,617
Loans Past Due 90 Days or More & Still Accruing	$ 0	$ 0