Accumulated Other Comprehensive Income (Schedule of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive income (loss), Beginning Balance	$ (993)	$ (71)
Other comprehensive income	742	947
Total accumulated other comprehensive income (loss), Ending Balance	(251)	876
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Total accumulated other comprehensive income (loss), Beginning Balance	(993)	(71)
Other comprehensive income	742	947
Total accumulated other comprehensive income (loss), Ending Balance	$ (251)	$ 876