Related Party Transactions (Amounts Included In IS) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Premiums:
Direct	$ 383,312	$ 352,491	$ 749,555	$ 692,059
Assumed	0	0	0	0
Ceded	(359,830)	(334,484)	(710,436)	(658,807)
Net Premiums	23,482	18,007	39,119	33,252
Policy charges and fee income:
Direct	694,126	688,988	1,426,691	1,352,773
Assumed	(13,919)	135,518	155,292	226,349
Ceded	(150,174)	(301,310)	(511,185)	(542,301)
Net policy charges and fee income	530,033	523,196	1,070,798	1,036,821
Net investment income:
Direct	102,306	104,007	206,354	202,998
Assumed	364	340	693	678
Ceded	(1,184)	(1,127)	(2,141)	(1,979)
Net investment income	101,486	103,220	204,906	201,697
Net other income:
Direct	12,841	13,167	25,152	26,574
Assumed & Ceded	2,172	0	7,078	0
Net other income	15,013	13,167	32,230	26,574
Interest credited to policyholders’ account balances:
Direct	73,790	105,230	216,195	206,123
Assumed	32,790	30,984	61,615	60,231
Ceded	(58,337)	(52,438)	(112,090)	(102,775)
Net interest credited to policyholders’ account balances	48,243	83,776	165,720	163,579
Policyholders’ benefits (including change in reserves):
Direct	466,298	466,514	952,425	963,994
Assumed	(12,799)	137,403	223,085	320,078
Ceded	(396,233)	(531,786)	(1,059,843)	(1,126,906)
Net policyholders’ benefits (including change in reserves)	57,266	72,131	115,667	157,166
Net reinsurance expense allowances, net of capitalization and amortization	(17,371)	(64,615)	(87,083)	(128,167)
Realized investment gains (losses), net:
Direct	2,834,402	(477,059)	2,167,967	(1,598,581)
Assumed	0	0	0	0
Ceded	(3,005,058)	508,727	(2,279,598)	1,715,780
Total realized investment gains (losses), net	$ (170,656)	$ 31,668	$ (111,631)	$ 117,199