Loans (Schedule of Recorded Investment in Nonaccrual Loans) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual	$ 3,793	$ 3,143
Loans Past Due 90 Days or More & Still Accruing	2	146
Commercial and Industrial Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual	86	134
Loans Past Due 90 Days or More & Still Accruing	2	98
Commercial Real Estate Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual	1,408	2,047
Loans Past Due 90 Days or More & Still Accruing	0	48
Agricultural Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual	792	0
Loans Past Due 90 Days or More & Still Accruing	0	0
Home Equity Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual	73	204
Loans Past Due 90 Days or More & Still Accruing	0	0
Consumer Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual	85	90
Loans Past Due 90 Days or More & Still Accruing	0	0
Residential Mortgage Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual	1,349	668
Loans Past Due 90 Days or More & Still Accruing	0	0
Loans Acquired with Deteriorated Credit Quality
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual	1,264	68
Loans Past Due 90 Days or More & Still Accruing	$ 0	$ 0