Summary of Investments (Details 7) (Fixed maturities, USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Fixed maturities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Beginning balance	$ 167,961	$ 167,961	$ 167,961	$ 167,788
Additional credit loss recognized on securities previously impaired	0	0	0	173
Due to sales, maturities or payoffs during the period	(646)	0	(646)	0
Due to increases in cash flows expected to be collected that are recognized over the remaining life of the security	(41,192)	0	(41,192)	0
Ending balance	$ 126,123	$ 167,961	$ 126,123	$ 167,961