Statements of Operations and Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
REVENUES
Premiums	$ 67,265	$ 63,573	$ 896,839
Policy charges and fee income	2,171,278	2,209,579	1,755,224
Net investment income	402,808	422,809	338,370
Asset administration fees and other income	389,156	413,375	299,384
Realized investment gains (losses), net:
Other-than-temporary impairments on fixed maturity securities	(6,813)	(8,576)	(7,853)
Other-than-temporary impairments on fixed maturity securities transferred to other comprehensive income (loss)	0	(546)	1,354
Other realized investment gains (losses), net	890,886	(796,278)	(3,436,261)
Total realized investment gains (losses), net	884,073	(805,400)	(3,442,760)
Total revenues	3,914,580	2,303,936	(152,943)
BENEFITS AND EXPENSES
Policyholders’ benefits	187,088	114,068	604,057
Interest credited to policyholders’ account balances	249,175	30,280	68,889
Amortization of deferred policy acquisition costs	589,795	(13,946)	(179,816)
Commission expense	862,338	861,303	653,906
General, administrative and other expenses	181,964	194,636	470,602
Total benefits and expenses	2,070,360	1,186,341	1,617,638
INCOME (LOSS) FROM OPERATIONS BEFORE INCOME TAXES	1,844,220	1,117,595	(1,770,581)
Total income tax expense (benefit)	161,504	1,201,099	(680,493)
NET INCOME (LOSS)	1,682,716	(83,504)	(1,090,088)
Other comprehensive income (loss), before tax:
Foreign currency translation adjustments	(1,354)	109	(20)
Unrealized investment gains (losses) for the period	(248,688)	323,359	(555,540)
Total	(250,042)	323,468	(555,560)
Less: Income tax expense (benefit) related to other comprehensive income (loss)	(52,510)	98,644	(194,446)
Other comprehensive income (loss), net of taxes	(197,532)	224,824	(361,114)
Comprehensive income (loss)	$ 1,485,184	$ 141,320	$ (1,451,202)