ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details 2) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		5 Months Ended	6 Months Ended
	Jan. 31, 2015	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2015	Jun. 30, 2016
Successor
Reclassifications Out of Accumulated Other Comprehensive Income (Loss)
Benefits and settlement expenses, net of reinsurance ceded		$ (712,647)	$ (693,392)	$ (1,178,816)	$ (1,425,668)
Realized investment gains (losses): All other investments		88,783	(102,347)	(137,403)	170,492
Net impairment losses recognized in earnings		(967)	(5,734)	(5,734)	(3,584)
Income (loss) before income tax		260,580	(35,567)	(11,031)	495,559
Tax (expense) or benefit		(87,787)	9,991	1,875	(164,149)
Net income (loss)		172,793	(25,576)	(9,156)	331,410
Successor | Gains and losses on derivative instruments | Amount Reclassified from Accumulated Other Comprehensive Income (Loss)
Reclassifications Out of Accumulated Other Comprehensive Income (Loss)
Benefits and settlement expenses, net of reinsurance ceded			(41)	(131)
Income (loss) before income tax			(41)	(131)
Tax (expense) or benefit			14	45
Net income (loss)			(27)	(86)
Successor | Unrealized gains and losses on available-for-sale securities | Amount Reclassified from Accumulated Other Comprehensive Income (Loss)
Reclassifications Out of Accumulated Other Comprehensive Income (Loss)
Realized investment gains (losses): All other investments		16,932	3,350	3,723	22,468
Net impairment losses recognized in earnings		(967)	(5,734)	(5,734)	(3,584)
Income (loss) before income tax		15,965	(2,384)	(2,011)	18,884
Tax (expense) or benefit		(5,588)	834	703	(6,610)
Net income (loss)		$ 10,377	$ (1,550)	$ (1,308)	$ 12,274
Predecessor
Reclassifications Out of Accumulated Other Comprehensive Income (Loss)
Benefits and settlement expenses, net of reinsurance ceded	$ (266,575)
Realized investment gains (losses): All other investments	81,153
Net impairment losses recognized in earnings	(481)
Income (loss) before income tax	132,847
Tax (expense) or benefit	(44,325)
Net income (loss)	88,522
Predecessor | Gains and losses on derivative instruments | Amount Reclassified from Accumulated Other Comprehensive Income (Loss)
Reclassifications Out of Accumulated Other Comprehensive Income (Loss)
Benefits and settlement expenses, net of reinsurance ceded	(36)
Income (loss) before income tax	(36)
Tax (expense) or benefit	13
Net income (loss)	(23)
Predecessor | Unrealized gains and losses on available-for-sale securities | Amount Reclassified from Accumulated Other Comprehensive Income (Loss)
Reclassifications Out of Accumulated Other Comprehensive Income (Loss)
Realized investment gains (losses): All other investments	6,891
Net impairment losses recognized in earnings	(481)
Income (loss) before income tax	6,410
Tax (expense) or benefit	(2,244)
Net income (loss)	$ 4,166