Loans (Schedule of Recorded Investment in Nonaccrual Loans) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual Loans	$ 12,036	$ 12,579
Loans Past Due 90 Days or More & Still Accruing	408	642
Loans Acquired With Deteriorated Credit Quality
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual Loans	4,624	4,162
Loans Past Due 90 Days or More & Still Accruing	278	141
Loans Acquired With Deteriorated Credit Quality | Loans Acquired in Current Year
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual Loans	0	4,603
Loans Past Due 90 Days or More & Still Accruing	0	96
Commercial and Industrial Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual Loans	2,290	2,430
Loans Past Due 90 Days or More & Still Accruing	0	0
Commercial Real Estate Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual Loans	6,446	6,833
Loans Past Due 90 Days or More & Still Accruing	408	368
Agricultural Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual Loans	1,398	1,449
Loans Past Due 90 Days or More & Still Accruing	0	274
Home Equity Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual Loans	118	88
Loans Past Due 90 Days or More & Still Accruing	0	0
Consumer Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual Loans	228	162
Loans Past Due 90 Days or More & Still Accruing	0	0
Residential Mortgage Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual Loans	1,556	1,617
Loans Past Due 90 Days or More & Still Accruing	$ 0	$ 0