Summary of Investments - SOI OTTI table (Details 7) - Fixed maturities - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Beginning balance	$ 80,359	$ 98,416	$ 83,665	$ 102,343
Reductions due to increases in cash flows expected to be collected that are recognized over the remaining life of the security	(2,948)	(3,729)	(6,254)	(7,656)
Ending balance	$ 77,411	$ 94,687	$ 77,411	$ 94,687