Summary of Investments (Unrealized Appreciation) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Change in net unrealized investment appreciation
Available-for-sale fixed maturities	$ (12,841)	$ 44,586
Available-for-sale equity securities	(19,119)	3,872
Deferred policy acquisition costs	2,113	(13,764)
Income tax effect	10,447	(12,143)
Total change in net unrealized investment appreciation, net of tax	$ (19,400)	$ 22,551