Investments (Schedule of Unrealized Appreciation) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Investments [Abstract]
Net change in unrealized appreciation on available-for-sale securities before deferred tax	$ (1,326)	$ 3,123
Deferred income tax	451	(1,062)
Net change in unrealized appreciation on available-for-sale securities	$ (875)	$ 2,061