Investments (Fixed Maturities Proceeds) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Fixed maturity and equity security impairments
Noncash proceeds			$ 4,900	$ 4,300
Fixed maturities, available-for-sale
Available For Sale
Proceeds from sales	$ 35,296	$ 20,079	534,917	155,013
Proceeds from maturities/repayments	102,545	186,612	400,781	488,780
Gross investment gains from sales, prepayments and maturities	(1,519)	6,226	94,228	11,289
Gross investment losses from sales and maturities	(124)	(420)	(4,217)	(1,054)
Fixed maturity and equity security impairments
Net writedowns for OTTI losses on fixed maturities recognized in earnings	0	(1,080)	(16,259)	(1,463)
Equity securities, available-for-sale
Available For Sale
Proceeds from sales	3,150	687	31,602	687
Gross investment gains from sales, prepayments and maturities	125	345	341	345
Gross investment losses from sales and maturities	1	0	(1,933)	0
Fixed maturity and equity security impairments
Writedowns for impairments on equity securities	$ 0	$ 0	$ 0	$ (2)