FAIR VALUE OF FINANCIAL INSTRUMENTS (Details 3) - Successor - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Unobservable Input
Financial instruments with book value approximating to fair value	$ 66,500,000	$ 66,500,000
Annuity account
Valuation of Level 3 Financial Instruments
Fair Value of Liabilities	88,857,000
Level 3
Unobservable Input
Financial instruments that are valued using broker quotes	210,600,000	197,500,000
Level 3 | Other asset-backed securities
Valuation of Level 3 Financial Instruments
Fair Value of Assets	554,230,000	587,031,000
Unobservable Input
Financial instruments that are valued using broker quotes	178,400,000	152,900,000
Level 3 | Corporate securities
Unobservable Input
Financial instruments that are valued using broker quotes	$ 32,200,000	$ 44,600,000
Level 3 | Discounted cash flow | Other asset-backed securities | Minimum
Unobservable Input
Liquidity premium (as a percent)	0.44%	0.27%
Paydown rate (as a percent)	10.90%	10.20%
Level 3 | Discounted cash flow | Other asset-backed securities | Maximum
Unobservable Input
Liquidity premium (as a percent)	1.19%	1.49%
Paydown rate (as a percent)	11.83%	14.72%
Level 3 | Discounted cash flow | Other asset-backed securities | Weighted Average
Unobservable Input
Liquidity premium (as a percent)	0.70%	0.42%
Paydown rate (as a percent)	11.18%	13.11%
Level 3 | Actuarial Cash Flow Model [Member] | Embedded derivative - FIA
Unobservable Input
Fair Value Inputs, Asset Withdrawal Rate, Percent of Required Minimum Distribution, Prior to Required Age	1.00%
Fair Value Inputs, Asset Withdrawal Rate, Percent of Required Minimum Distribution, After Required Age	100.00%
Level 3 | Embedded derivative - GMWB
Valuation of Level 3 Financial Instruments
Fair Value of Liabilities	$ 128,877,000	$ 18,511,000
Level 3 | Embedded derivative - GMWB | Actuarial cash flow model
Unobservable Input
Utilization (as a percent)		99.00%
Level 3 | Embedded derivative - GMWB | Actuarial cash flow model | Minimum
Unobservable Input
Lapse (as a percent)		0.30%
Nonperformance risk (as a percent)		0.18%
Level 3 | Embedded derivative - GMWB | Actuarial cash flow model | Maximum
Unobservable Input
Lapse (as a percent)		15.00%
Nonperformance risk (as a percent)		1.04%
Level 3 | Annuity account
Valuation of Level 3 Financial Instruments
Fair Value of Liabilities		$ 92,512,000
Level 3 | Annuity account | Actuarial cash flow model
Unobservable Input
Expenses per policy	$ 126	$ 81
Withdrawal rate (as a percent)	2.20%	2.20%
Level 3 | Annuity account | Actuarial cash flow model | Minimum
Unobservable Input
Lapse (as a percent)	2.20%	2.20%
Nonperformance risk (as a percent)	0.20%	0.18%
Asset earned rate (as a percent)	4.02%	4.53%
Return on assets (as a percent)	1.50%	1.50%
Level 3 | Annuity account | Actuarial cash flow model | Maximum
Unobservable Input
Lapse (as a percent)	33.00%	33.00%
Nonperformance risk (as a percent)	1.19%	1.04%
Asset earned rate (as a percent)	5.76%	5.67%
Return on assets (as a percent)	1.85%	1.85%
Level 3 | Embedded derivative - FIA
Valuation of Level 3 Financial Instruments
Fair Value of Liabilities	$ 141,651,000	$ 100,329,000
Level 3 | Embedded derivative - FIA | Actuarial cash flow model
Unobservable Input
Expenses per policy	$ 126	$ 81.5
Level 3 | Embedded derivative - FIA | Actuarial cash flow model | Minimum
Unobservable Input
Lapse (as a percent)	2.00%	2.50%
Nonperformance risk (as a percent)	0.20%	0.18%
Withdrawal rate (as a percent)		1.10%
Level 3 | Embedded derivative - FIA | Actuarial cash flow model | Maximum
Unobservable Input
Lapse (as a percent)	40.00%	40.00%
Nonperformance risk (as a percent)	1.19%	1.04%
Withdrawal rate (as a percent)		4.50%
Level 3 | Embedded derivative - IUL
Valuation of Level 3 Financial Instruments
Fair Value of Liabilities	$ 46,348,000	$ 29,629,000
Level 3 | Embedded derivative - IUL | Actuarial cash flow model | Minimum
Unobservable Input
Lapse (as a percent)	0.50%	0.50%
Nonperformance risk (as a percent)	0.20%	0.18%
Mortality (as a percent)	38.00%	38.00%
Level 3 | Embedded derivative - IUL | Actuarial cash flow model | Maximum
Unobservable Input
Lapse (as a percent)	10.00%	10.00%
Nonperformance risk (as a percent)	1.19%	1.04%
Mortality (as a percent)	153.00%	153.00%
Level 3 | Corporate securities
Valuation of Level 3 Financial Instruments
Fair Value of Assets	$ 726,890,000	$ 875,810,000
Level 3 | Corporate securities | Discounted cash flow | Minimum
Unobservable Input
Spread over treasury (as a percent)	0.97%	0.10%
Level 3 | Corporate securities | Discounted cash flow | Maximum
Unobservable Input
Spread over treasury (as a percent)	5.10%	19.00%
Level 3 | Corporate securities | Discounted cash flow | Weighted Average
Unobservable Input
Spread over treasury (as a percent)	2.11%	2.61%
Level 3 | Embedded derivative - GMWB | Actuarial cash flow model
Unobservable Input
Utilization (as a percent)	99.00%
Policies that have a one-time over-utilization rate of a specified amount (as a percent)	10.00%	10.00%
Specified level of one-time over-utilization (as a percent)	400.00%	400.00%
Level 3 | Embedded derivative - GMWB | Actuarial cash flow model | Minimum
Unobservable Input
Lapse (as a percent)	0.30%
Nonperformance risk (as a percent)	0.20%
Mortality (as a percent)	91.10%
Level 3 | Embedded derivative - GMWB | Actuarial cash flow model | Maximum
Unobservable Input
Lapse (as a percent)	15.00%
Nonperformance risk (as a percent)	1.19%
Mortality (as a percent)	106.60%