Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net income		$ 219,830	$ 126,023	$ 253,283
Other comprehensive income (loss):
Change in net unrealized investment gains/losses (1)	[1]	(797,374)	1,038,604	(1,001,943)
Noncredit component of OTTI losses (1)	[1]	(2,927)	1,265	586
Reclassification of unrealized investment gains/losses to net income (1)	[1]	703	(1,092)	15,802
Other comprehensive income (loss) before income tax		(799,598)	1,038,777	(985,555)
Income tax effect related to other comprehensive income (loss)		279,860	(363,572)	344,944
Other comprehensive income (loss)		(519,738)	675,205	(640,611)
Comprehensive income (loss)		$ (299,908)	$ 801,228	$ (387,328)

[1] Net of related adjustments to amortization of deferred sales inducements and deferred policy acquisition costs.