ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details 2) - USD ($)	1 Months Ended	2 Months Ended	3 Months Ended
	Jan. 31, 2015	Mar. 31, 2015	Mar. 31, 2016
Successor
Reclassifications Out of Accumulated Other Comprehensive Income (Loss)
Benefits and settlement expenses, net of reinsurance ceded		$ (485,424,000)	$ (713,021,000)
Realized investment gains (losses): All other investments		(35,056,000)	81,709,000
Net impairment losses recognized in earnings		0	(2,617,000)
Income before income tax		24,536,000	234,979,000
Tax (expense) or benefit		(8,116,000)	(76,362,000)
Net income		16,420,000	158,617,000
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		(90,000)
Income before income tax		(90,000)
Tax (expense) or benefit		31,000
Net income		(59,000)
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		373,000	5,536,000
Net impairment losses recognized in earnings		0	(2,617,000)
Income before income tax		373,000	2,919,000
Tax (expense) or benefit		(131,000)	(1,022,000)
Net income		$ 242,000	$ 1,897,000
Predecessor
Reclassifications Out of Accumulated Other Comprehensive Income (Loss)
Benefits and settlement expenses, net of reinsurance ceded	$ (266,575,000)
Realized investment gains (losses): All other investments	81,153,000
Net impairment losses recognized in earnings	(481,000)
Income before income tax	132,847,000
Tax (expense) or benefit	(44,325,000)
Net income	88,522,000
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	(36,000)
Income before income tax	(36,000)
Tax (expense) or benefit	13,000
Net income	(23,000)
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	6,891,000
Net impairment losses recognized in earnings	(481,000)
Income before income tax	6,410,000
Tax (expense) or benefit	(2,244,000)
Net income	$ 4,166,000