Parent Company Financial Information (Schedule of Condensed Statements of Income) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Condensed Income Statements, Captions [Line Items]
Interest expense	$ 1,593	$ 1,483	$ 1,382	$ 1,262	$ 1,206	$ 760	$ 708	$ 650	$ 5,720	$ 3,324
Net income	$ 808	$ 2,411	$ 2,286	$ 2,441	$ 2,313	$ 1	$ 1,109	$ 1,556	7,946	4,979
Parent Company [Member]
Condensed Income Statements, Captions [Line Items]
Equity in undistributed income of subsidiary									8,496	(3,213)
Dividends from subsidiary									250	8,950
Total income									8,746	5,737
Interest expense									800	758
Total expense									800	758
Net income									$ 7,946	$ 4,979