Loans (Schedule of Recorded Investment in Nonaccrual Loans) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual Loans	$ 3,097	$ 3,793
Loans Past Due 90 Days or More & Still Accruing	63	2
Commercial and Industrial Loans and Leases
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual Loans	60	86
Loans Past Due 90 Days or More & Still Accruing	0	2
Commercial Real Estate Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual Loans	982	1,408
Loans Past Due 90 Days or More & Still Accruing	32	0
Agricultural Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual Loans	878	792
Loans Past Due 90 Days or More & Still Accruing	31	0
Home Equity Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual Loans	72	73
Loans Past Due 90 Days or More & Still Accruing	0	0
Consumer Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual Loans	433	85
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	672	1,349
Loans Past Due 90 Days or More & Still Accruing	0	0
Receivables Acquired with Deteriorated Credit Quality
Financing Receivable, Recorded Investment, Past Due [Line Items]
Non-Accrual Loans	820	1,264
Loans Past Due 90 Days or More & Still Accruing	$ 0	$ 0