Troubled Debt Restructurings (Schedule of Troubled Debt Restructurings on Financing Receivables) (Details) $ in Thousands	12 Months Ended
Dec. 31, 2016 USD ($) contract	Dec. 31, 2015 USD ($) contract	Dec. 31, 2014 USD ($) contract
Troubled Debt Restructuring, Subsequent Periods [Line Items]
Number of Contracts \| contract	5	3	5
Pre-Modification Outstanding Recorded Investment	$ 1,296	$ 794	$ 2,746
Post-Modification Outstanding Recorded Investment	$ 1,199	$ 794	$ 1,974
Commercial - Non Real Estate Commercial And Industrial [Member]
Troubled Debt Restructuring, Subsequent Periods [Line Items]
Number of Contracts \| contract			2
Pre-Modification Outstanding Recorded Investment			$ 941
Post-Modification Outstanding Recorded Investment			$ 639
Commercial Real Estate Non-Owner Occupied [Member]
Troubled Debt Restructuring, Subsequent Periods [Line Items]
Number of Contracts \| contract	1
Pre-Modification Outstanding Recorded Investment	$ 736
Post-Modification Outstanding Recorded Investment	$ 736
Construction And Farmland Commercial [Member]
Troubled Debt Restructuring, Subsequent Periods [Line Items]
Number of Contracts \| contract			1
Pre-Modification Outstanding Recorded Investment			$ 1,520
Post-Modification Outstanding Recorded Investment			$ 1,050
Residential Equity Lines [Member]
Troubled Debt Restructuring, Subsequent Periods [Line Items]
Number of Contracts \| contract			1
Pre-Modification Outstanding Recorded Investment			$ 69
Post-Modification Outstanding Recorded Investment			$ 69
Residential Single Family [Member]
Troubled Debt Restructuring, Subsequent Periods [Line Items]
Number of Contracts \| contract	4	3	1
Pre-Modification Outstanding Recorded Investment	$ 560	$ 794	$ 216
Post-Modification Outstanding Recorded Investment	$ 463	$ 794	$ 216