DERIVATIVE FINANCIAL INSTRUMENTS (Details) $ in Thousands	1 Months Ended	3 Months Ended		5 Months Ended	6 Months Ended
	Jan. 31, 2015 USD ($)	Jun. 30, 2015 USD ($) position	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) position	Jun. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross		$ 94,603		$ 128,244
Notional Amount, Other long-term investments		10,969,301		10,969,301
Fair Value, Other long-term investments		394,947		394,947
Notional Amount, Other liabilities		10,399,489		10,399,489
Fair Value, Other liabilities		$ 518,571		$ 518,571
Cash flow hedges. | Interest rate swaps
Notional amount and fair value of the entity's derivative financial instruments
Positions held | position		0		0
Derivatives not designated as hedging instruments
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross		$ 94,603		$ 128,244
Derivatives not designated as hedging instruments | Annuity account
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross		(17,672)		(18,685)
Derivatives not designated as hedging instruments | FIA
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross		1,664		3,644
Derivatives not designated as hedging instruments | IUL
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross		1,469		1,880
Derivatives not designated as hedging instruments | Interest rate futures | Annuity account
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross		(14,183)		(14,231)
Derivatives not designated as hedging instruments | Equity futures
Notional amount and fair value of the entity's derivative financial instruments
Notional Amount, Other long-term investments		646,935		646,935
Fair Value, Other long-term investments		7,906		7,906
Notional Amount, Other liabilities		10,289		10,289
Fair Value, Other liabilities		47		47
Derivatives not designated as hedging instruments | Equity futures | Annuity account
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross		(5,267)		(37,736)
Derivatives not designated as hedging instruments | Equity futures | FIA
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross		123		307
Derivatives not designated as hedging instruments | Equity futures | IUL
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross		9		23
Derivatives not designated as hedging instruments | Currency futures
Notional amount and fair value of the entity's derivative financial instruments
Notional Amount, Other long-term investments		111,856		111,856
Fair Value, Other long-term investments		1,412		1,412
Notional Amount, Other liabilities		137,101		137,101
Fair Value, Other liabilities		2,021		2,021
Derivatives not designated as hedging instruments | Currency futures | Annuity account
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross		(8,709)		(2,572)
Derivatives not designated as hedging instruments | Volatility futures | FIA
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross		25		29
Derivatives not designated as hedging instruments | Equity options
Notional amount and fair value of the entity's derivative financial instruments
Notional Amount, Other long-term investments		2,695,658		2,695,658
Fair Value, Other long-term investments		186,051		186,051
Notional Amount, Other liabilities		1,255,872		1,255,872
Fair Value, Other liabilities		36,100		36,100
Derivatives not designated as hedging instruments | Equity options | Annuity account
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross		(3,550)		(25,324)
Derivatives not designated as hedging instruments | Equity options | FIA
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross		1,226		5,601
Derivatives not designated as hedging instruments | Equity options | IUL
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross		(78)		62
Derivatives not designated as hedging instruments | Interest rate swaptions
Notional amount and fair value of the entity's derivative financial instruments
Notional Amount, Other long-term investments		225,000		225,000
Fair Value, Other long-term investments		8,237		8,237
Derivatives not designated as hedging instruments | Interest rate swaptions | Annuity account
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross		2,547		(8,781)
Derivatives not designated as hedging instruments | Interest rate swaps
Notional amount and fair value of the entity's derivative financial instruments
Notional Amount, Other long-term investments		750,000		750,000
Fair Value, Other long-term investments		20,606		20,606
Notional Amount, Other liabilities		1,225,000		1,225,000
Fair Value, Other liabilities		$ 49,179		$ 49,179
Positions held | position		0		0
Derivatives not designated as hedging instruments | Interest rate swaps | Annuity account
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross		$ (121,167)		$ (175,958)
Derivatives not designated as hedging instruments | Embedded derivative - GMWB
Notional amount and fair value of the entity's derivative financial instruments
Notional Amount, Other long-term investments		6,028,811		6,028,811
Fair Value, Other long-term investments		167,275		167,275
Notional Amount, Other liabilities		4,057,354		4,057,354
Fair Value, Other liabilities		107,393		107,393
Derivatives not designated as hedging instruments | Embedded derivative - GMWB | Annuity account
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross		132,657		245,917
Derivatives not designated as hedging instruments | Embedded derivative - FIA
Notional amount and fair value of the entity's derivative financial instruments
Notional Amount, Other liabilities		854,986		854,986
Fair Value, Other liabilities		85,129		85,129
Derivatives not designated as hedging instruments | Embedded derivative - FIA | FIA
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross		290		(2,293)
Derivatives not designated as hedging instruments | Embedded derivative - IUL
Notional amount and fair value of the entity's derivative financial instruments
Notional Amount, Other liabilities		28,270		28,270
Fair Value, Other liabilities		11,902		11,902
Derivatives not designated as hedging instruments | Embedded derivative - IUL | IUL
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross		1,538		1,795
Derivatives not designated as hedging instruments | Embedded derivative - Modco reinsurance treaties
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross		109,131		141,322
Notional Amount, Other long-term investments		65,242		65,242
Fair Value, Other long-term investments		2,321		2,321
Notional Amount, Other liabilities		2,496,000		2,496,000
Fair Value, Other liabilities		223,342		223,342
Derivatives not designated as hedging instruments | Interest rate futures
Notional amount and fair value of the entity's derivative financial instruments
Notional Amount, Other long-term investments		445,008		445,008
Fair Value, Other long-term investments		795		795
Notional Amount, Other liabilities		334,067		334,067
Fair Value, Other liabilities		3,453		3,453
Derivatives not designated as hedging instruments | Other.
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross		11		83
Notional Amount, Other long-term investments		791		791
Fair Value, Other long-term investments		344		344
Notional Amount, Other liabilities		550		550
Fair Value, Other liabilities		$ 5		$ 5
Predecessor
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross	$ (123,274)		$ (89,926)		$ (195,276)
Notional Amount, Other long-term investments						$ 7,178,906
Fair Value, Other long-term investments						293,970
Notional Amount, Other liabilities						11,763,048
Fair Value, Other liabilities						820,739
Predecessor | Cash flow hedges. | Inflation
Notional amount and fair value of the entity's derivative financial instruments
Notional Amount, Other liabilities						40,469
Fair Value, Other liabilities						142
Predecessor | Derivatives not designated as hedging instruments
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross	(123,274)		(89,926)		(195,276)
Predecessor | Derivatives not designated as hedging instruments | Annuity account
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross	(53,581)		(32,588)		(80,780)
Predecessor | Derivatives not designated as hedging instruments | FIA
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross	(1,032)		(4,710)		(1,638)
Predecessor | Derivatives not designated as hedging instruments | IUL
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross	(598)		(285)		(285)
Predecessor | Derivatives not designated as hedging instruments | Interest rate futures | Annuity account
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross	1,413		6,548		10,798
Predecessor | Derivatives not designated as hedging instruments | Equity futures
Notional amount and fair value of the entity's derivative financial instruments
Notional Amount, Other long-term investments						26,483
Fair Value, Other long-term investments						427
Notional Amount, Other liabilities						385,256
Fair Value, Other liabilities						15,069
Predecessor | Derivatives not designated as hedging instruments | Equity futures | Annuity account
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross	9,221		(7,259)		(9,910)
Predecessor | Derivatives not designated as hedging instruments | Equity futures | FIA
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross	(184)		605		950
Predecessor | Derivatives not designated as hedging instruments | Equity futures | IUL
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross	3
Predecessor | Derivatives not designated as hedging instruments | Currency futures
Notional amount and fair value of the entity's derivative financial instruments
Notional Amount, Other long-term investments						197,648
Fair Value, Other long-term investments						2,384
Predecessor | Derivatives not designated as hedging instruments | Currency futures | Annuity account
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross	7,778		(2,887)		(4,165)
Predecessor | Derivatives not designated as hedging instruments | Volatility futures | FIA
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross			8		8
Predecessor | Derivatives not designated as hedging instruments | Variance swaps | Annuity account
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross			(823)		(2,673)
Predecessor | Derivatives not designated as hedging instruments | Equity options
Notional amount and fair value of the entity's derivative financial instruments
Notional Amount, Other long-term investments						1,921,167
Fair Value, Other long-term investments						163,212
Notional Amount, Other liabilities						699,295
Fair Value, Other liabilities						47,077
Predecessor | Derivatives not designated as hedging instruments | Equity options | Annuity account
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross	3,047		(20,949)		(33,290)
Predecessor | Derivatives not designated as hedging instruments | Equity options | FIA
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross	(2,617)		2,984		3,978
Predecessor | Derivatives not designated as hedging instruments | Equity options | IUL
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross	(115)
Predecessor | Derivatives not designated as hedging instruments | Interest rate swaptions
Notional amount and fair value of the entity's derivative financial instruments
Notional Amount, Other long-term investments						625,000
Fair Value, Other long-term investments						8,012
Predecessor | Derivatives not designated as hedging instruments | Interest rate swaptions | Annuity account
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross	9,268		(4,998)		(14,401)
Predecessor | Derivatives not designated as hedging instruments | Interest rate swaps
Notional amount and fair value of the entity's derivative financial instruments
Notional Amount, Other long-term investments						1,550,000
Fair Value, Other long-term investments						50,743
Notional Amount, Other liabilities						275,000
Fair Value, Other liabilities						3,599
Predecessor | Derivatives not designated as hedging instruments | Interest rate swaps | Annuity account
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross	122,710		45,169		102,537
Predecessor | Derivatives not designated as hedging instruments | Embedded derivative - GMWB
Notional amount and fair value of the entity's derivative financial instruments
Notional Amount, Other long-term investments						2,804,629
Fair Value, Other long-term investments						66,843
Notional Amount, Other liabilities						7,038,228
Fair Value, Other liabilities						311,969
Predecessor | Derivatives not designated as hedging instruments | Embedded derivative - GMWB | Annuity account
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross	(207,018)		(47,389)		(129,676)
Predecessor | Derivatives not designated as hedging instruments | Embedded derivative - FIA
Notional amount and fair value of the entity's derivative financial instruments
Notional Amount, Other liabilities						749,933
Fair Value, Other liabilities						124,465
Predecessor | Derivatives not designated as hedging instruments | Embedded derivative - FIA | FIA
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross	1,769		(8,307)		(6,574)
Predecessor | Derivatives not designated as hedging instruments | Embedded derivative - IUL
Notional amount and fair value of the entity's derivative financial instruments
Notional Amount, Other liabilities						12,019
Fair Value, Other liabilities						6,691
Predecessor | Derivatives not designated as hedging instruments | Embedded derivative - IUL | IUL
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross	(486)		(285)		(285)
Predecessor | Derivatives not designated as hedging instruments | Embedded derivative - Modco reinsurance treaties
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross	(68,026)		(52,202)		(112,371)
Notional Amount, Other long-term investments						25,760
Fair Value, Other long-term investments						1,051
Notional Amount, Other liabilities						2,562,848
Fair Value, Other liabilities						311,727
Predecessor | Derivatives not designated as hedging instruments | Interest rate futures
Notional amount and fair value of the entity's derivative financial instruments
Notional Amount, Other long-term investments						27,977
Fair Value, Other long-term investments						938
Predecessor | Derivatives not designated as hedging instruments | Other.
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross	$ (37)		$ (141)		$ (202)
Notional Amount, Other long-term investments						242
Fair Value, Other long-term investments						$ 360