Investments (Fixed Maturities Proceeds) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Fixed maturities, available-for-sale
Available For Sale
Proceeds from sales	$ 4,380	$ 55,825	$ 21,177	$ 228,248
Proceeds from maturities/repayments	96,304	125,561	371,310	619,263
Gross investment gains from sales, prepayments, and maturities	168	4,001	5,124	8,125
Gross investment losses from sales and maturities	(420)	(102)	(452)	(3,349)
Fixed maturity and equity security impairments
Net Writedowns for other-than-temporary impairment losses on fixed maturities recognized in earnings	0	0	(20)	0
Equity securities, available-for-sale
Available For Sale
Proceeds from sales	0	0	0	0
Gross investment gains from sales, prepayments, and maturities	0	0	0	1
Gross investment losses from sales and maturities	0	0	0	0
Fixed maturity and equity security impairments
Writedowns for impairments on equity securities	$ 0	$ 0	$ 0	$ 0