Fair Value Measurements (Schedule of Level 3 Fair Value Measurements) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Collateral-dependent impaired loans [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Collateral-dependent impaired loans	$ 94	$ 1,053
Valuation Technique	Market comparable properties	Market comparable properties and specialized equipment discounts
Unobservable Input	Discounts	Discounts
Weighted Average	0.27	25%
Foreclosed assets [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Foreclosed assets	$ 27	$ 2
Valuation Technique	Expected selling price	Expected selling price
Unobservable Input	Selling Costs	Selling Costs
Weighted Average		10%