Accumulated Other Comprehensive Income (Schedule of Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Accumulated Other Comprehensive Income [Abstract]
Net unrealized holding gains arising during period, before tax	$ 524	$ 141	$ 734	$ 535
Reclassification adjustments, before tax	(9)	(30)	(9)	(30)
Other comprehensive gain, before tax	515	111	725	505
Net unrealized holding gains arising during period, tax effect	206	55	289	210
Reclassification adjustments, tax effect	(3)	(10)	(3)	(10)
Other comprehensive gain, tax effect	203	45	286	200
Net unrealized holding gains arising during period, net of tax	318	86	445	325
Reclassification adjustments, net of tax	(6)	(20)	(6)	(20)
Other comprehensive gain, net of tax	$ 312	$ 66	$ 439	$ 305