Related Party Transactions (Income Statement Reinsurance Results) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Premiums:
Direct	$ 11,260	$ 8,110	$ 17,048	$ 17,302
Assumed	831,337	0	831,337	0
Ceded	0	0	(298)	0
Net premiums	842,597	8,110	848,087	17,302
Policy charges and fee income:
Direct	163,088	192,390	324,292	384,543
Assumed	374,295	0	374,295	0
Ceded	(11,364)	(981)	(23,062)	(1,751)
Net policy charges and fee income	526,019	191,409	675,525	382,792
Interest credited to policyholders’ account balances:
Direct	8,867	16,268	151,863	107,898
Assumed	46,094	0	46,094	0
Ceded	180	0	(11,157)	0
Net interest credited to policyholders’ account balances	55,141	16,268	186,800	107,898
Realized investment gains (losses), net:
Direct	1,547,312	1,147,303	917,202	924,091
Assumed	(3,761,202)	0	(3,761,202)	0
Ceded	(233,804)	(1,156,459)	382,064	(919,772)
Total realized investment gains (losses), net	(2,447,694)	(9,156)	(2,461,936)	4,319
Net reinsurance expense allowances, net of capitalization and amortization	$ 609	$ 95	$ 884	$ 323