Statement of Operations (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
REVENUES
Premiums	$ 34,903	$ 28,019	$ 21,824
Policy charges and fee income	806,327	809,242	796,995
Net investment income	164,011	217,883	277,651
Asset management fees and other income	227,619	239,489	266,321
Realized investment gains (losses), net:
Other-than-temporary impairments on fixed maturity securities	(10)	0	(6,852)
Other-than-temporary impairments on fixed maturity securities transferred to Other Comprehensive Income	10	0	6,594
Other realized investment gains (losses), net	7,368	(184,351)	(82,972)
Total realized investment gains (losses), net	7,368	(184,351)	(83,230)
TOTAL REVENUES	1,240,228	1,110,282	1,279,561
BENEFITS AND EXPENSES
Policyholders' benefits	137,135	29,727	124,316
Interest credited to policyholders' account balances	211,058	(117,027)	60,830
Amortization of deferred policy acquisition costs	238,416	(385,561)	(188,042)
General, administrative and other expenses	394,248	402,679	424,764
TOTAL BENEFITS AND EXPENSES	980,857	(70,182)	421,868
INCOME FROM OPERATIONS BEFORE INCOME TAXES	259,371	1,180,464	857,693
IncomeTaxExpenseBenefitAbstract
Current Income Tax Expense (Benefit)	(8,499)	36,759	26,637
Deferred Income Tax Expense (Benefit)	17,103	295,613	196,997
Income tax expense (benefit)	8,604	332,372	223,634
NET INCOME	250,767	848,092	634,059
Other Comprehensive Income (Loss), before Tax [Abstract]
Foreign currency translation adjustments	(63)	5	10
Unrealized investment gains (losses) for the period	35,931	(108,769)	2,734
Reclassification adjustment for (gains) losses included in net income	(14,706)	(8,805)	(23,387)
Net unrealized investment gains (losses)	21,225	(117,574)	(20,653)
Other comprehensive income (loss), before tax	21,162	(117,569)	(20,643)
Other Comprehensive Income (Loss), Tax [Abstract]
Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax	(23)	2	4
Other Comprehensive Income Loss Available For Sale Securities Tax	7,430	(41,151)	(7,222)
Other Comprehensive Income (Loss), Tax, Total	7,407	(41,149)	(7,218)
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Other comprehensive income (loss)	13,755	(76,420)	(13,425)
COMPREHENSIVE INCOME	$ 264,522	$ 771,672	$ 620,634