DERIVATIVE FINANCIAL INSTRUMENTS (Details) (USD $) In Thousands, unless otherwise specified	2 Months Ended	1 Months Ended	3 Months Ended
	Mar. 31, 2015	Jan. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross	$ 33,641
Notional Amount, Other long-term investments	9,358,874
Fair Value, Other long-term investments	397,113
Notional Amount, Other liabilities	10,774,817
Fair Value, Other liabilities	674,250
Cash flow hedges. | Inflation
Notional amount and fair value of the entity's derivative financial instruments
Notional Amount, Other liabilities	19,285
Fair Value, Other liabilities	55
Derivatives not designated as hedging instruments
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross	33,641
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	(1,013)
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	1,980
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	411
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	(48)
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	26,607
Fair Value, Other long-term investments	102
Notional Amount, Other liabilities	666,286
Fair Value, Other liabilities	4,547
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	(32,469)
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
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	14
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	112,106
Fair Value, Other long-term investments	524
Notional Amount, Other liabilities	122,150
Fair Value, Other liabilities	1,379
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	6,137
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	4
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	2,285,482
Fair Value, Other long-term investments	163,491
Notional Amount, Other liabilities	960,718
Fair Value, Other liabilities	38,866
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	(21,774)
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	4,375
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	140
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
Fair Value, Other long-term investments	5,690
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	(11,328)
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	1,725,000
Fair Value, Other long-term investments	99,230
Notional Amount, Other liabilities	250,000
Fair Value, Other liabilities	1,792
Positions held	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	(54,791)
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	4,507,255
Fair Value, Other long-term investments	121,322
Notional Amount, Other liabilities	5,427,085
Fair Value, Other liabilities	194,098
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	113,260
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	790,225
Fair Value, Other liabilities	83,126
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	(2,583)
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	18,262
Fair Value, Other liabilities	8,593
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	257
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	32,191
Notional Amount, Other long-term investments	65,609
Fair Value, Other long-term investments	1,572
Notional Amount, Other liabilities	2,512,057
Fair Value, Other liabilities	341,698
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	410,966
Fair Value, Other long-term investments	4,731
Notional Amount, Other liabilities	8,140
Fair Value, Other liabilities	54
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	72
Notional Amount, Other long-term investments	849
Fair Value, Other long-term investments	451
Notional Amount, Other liabilities	609
Fair Value, Other liabilities	42
Predecessor
Notional amount and fair value of the entity's derivative financial instruments
Realized investment gains (losses) - derivatives, gross		(123,274)	(105,350)
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)	(105,350)
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)	(48,192)
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)	3,072
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)
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	4,250
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	(2,651)
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)	345
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	(1,278)
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			(1,850)
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	(12,341)
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)	994
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	(9,403)
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	57,368
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)	(82,287)
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	1,733
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)
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)	(60,169)
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)	(61)
Notional Amount, Other long-term investments				242
Fair Value, Other long-term investments				$ 360