Investments, Gain (Loss) on Investments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Gain (Loss) on Investments [Line Items]
Net realized investment gains (losses) on investments	$ 640	$ 632	$ 27,133	$ 923
Gross realized gains, gross realized losses and impairment losses [Abstract]
Gains on sales	720	1,161	28,711	3,273
Losses on sales	(80)	(529)	(1,578)	(2,350)
Net realized investment gains	640	632	27,133	923
Fixed maturities
Gain (Loss) on Investments [Line Items]
Net realized investment gains (losses) on investments	638	629	27,123	755
Gross realized gains, gross realized losses and impairment losses [Abstract]
Net realized investment gains	638	629	27,123	755
Equity securities
Gain (Loss) on Investments [Line Items]
Net realized investment gains (losses) on investments	2	3	10	168
Gross realized gains, gross realized losses and impairment losses [Abstract]
Net realized investment gains	$ 2	$ 3	$ 10	$ 168