FAIR VALUE OF FINANCIAL INSTRUMENTS (Details 3) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Embedded derivative - GMWB | Actuarial cash flow model
Unobservable Input
Policies that have a one-time over-utilization rate of a specified amount (as a percent)	10.00%
Specified level of one-time over-utilization (as a percent)	400.00%
Level 3
Unobservable Input
Financial instruments that are valued using broker quotes	234,800,000
Financial instruments with book value approximating to fair value	66,700,000
Level 3 | Other asset-backed securities
Valuation of Level 3 Financial Instruments
Fair Value of Assets	600,073,000
Unobservable Input
Financial instruments that are valued using broker quotes	170,600,000
Level 3 | Equity securities
Unobservable Input
Financial instruments with book value approximating to fair value	66,700,000
Level 3 | Discounted cash flow | Other asset-backed securities | Minimum
Unobservable Input
Liquidity premium (as a percent)	0.52%
Paydown rate (as a percent)	9.70%
Level 3 | Discounted cash flow | Other asset-backed securities | Maximum
Unobservable Input
Liquidity premium (as a percent)	1.50%
Paydown rate (as a percent)	16.93%
Level 3 | Discounted cash flow | Other asset-backed securities | Weighted Average
Unobservable Input
Liquidity premium (as a percent)	0.91%
Paydown rate (as a percent)	12.22%
Level 3 | Embedded derivative - GMWB
Valuation of Level 3 Financial Instruments
Fair Value of Assets	10,839,000
Level 3 | Annuity account
Valuation of Level 3 Financial Instruments
Fair Value of Liabilities	97,108,000
Level 3 | Annuity account | Actuarial cash flow model
Unobservable Input
Expenses per policy	80
Withdrawal rate (as a percent)	2.20%
Level 3 | Annuity account | Actuarial cash flow model | Minimum
Unobservable Input
Lapse (as a percent)	2.20%
Nonperformance risk (as a percent)	0.14%
Asset earned rate (as a percent)	3.71%
Return on assets (as a percent)	1.50%
Level 3 | Annuity account | Actuarial cash flow model | Maximum
Unobservable Input
Lapse (as a percent)	33.00%
Nonperformance risk (as a percent)	0.99%
Asset earned rate (as a percent)	5.77%
Return on assets (as a percent)	1.85%
Level 3 | Embedded derivative - FIA
Valuation of Level 3 Financial Instruments
Fair Value of Liabilities	83,119,000
Level 3 | Embedded derivative - FIA | Actuarial cash flow model
Unobservable Input
Expenses per policy	80
Level 3 | Embedded derivative - FIA | Actuarial cash flow model | Minimum
Unobservable Input
Lapse (as a percent)	2.50%
Nonperformance risk (as a percent)	0.14%
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%
Nonperformance risk (as a percent)	0.99%
Withdrawal rate (as a percent)	4.50%
Level 3 | Embedded derivative - IUL
Valuation of Level 3 Financial Instruments
Fair Value of Liabilities	8,599,000
Level 3 | Embedded derivative - IUL | Actuarial cash flow model | Minimum
Unobservable Input
Mortality (as a percent)	44.00%
Lapse (as a percent)	0.50%
Nonperformance risk (as a percent)	0.14%
Level 3 | Embedded derivative - IUL | Actuarial cash flow model | Maximum
Unobservable Input
Mortality (as a percent)	137.00%
Lapse (as a percent)	10.00%
Nonperformance risk (as a percent)	0.99%
Level 3 | Corporate securities
Valuation of Level 3 Financial Instruments
Fair Value of Assets	1,238,548,000
Unobservable Input
Financial instruments that are valued using broker quotes	64,200,000
Level 3 | Corporate securities | Discounted cash flow | Minimum
Unobservable Input
Spread over treasury (as a percent)	0.53%
Level 3 | Corporate securities | Discounted cash flow | Maximum
Unobservable Input
Spread over treasury (as a percent)	14.07%
Level 3 | Corporate securities | Discounted cash flow | Weighted Average
Unobservable Input
Spread over treasury (as a percent)	2.45%
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)	0.29%
Nonperformance risk (as a percent)	0.14%
Level 3 | Embedded derivative - GMWB | Actuarial cash flow model | Maximum
Unobservable Input
Lapse (as a percent)	17.00%
Nonperformance risk (as a percent)	0.99%
Predecessor | Level 3
Unobservable Input
Financial instruments that are valued using broker quotes		237,200,000
Financial instruments with book value approximating to fair value		70,400,000
Predecessor | Level 3 | Other asset-backed securities
Valuation of Level 3 Financial Instruments
Fair Value of Assets		563,752,000
Unobservable Input
Financial instruments that are valued using broker quotes		169,700,000
Predecessor | Level 3 | Equity securities
Unobservable Input
Financial instruments with book value approximating to fair value		66,700,000
Predecessor | Level 3 | Fixed maturities
Unobservable Input
Financial instruments with book value approximating to fair value		3,700,000
Predecessor | Level 3 | Discounted cash flow | Other asset-backed securities | Minimum
Unobservable Input
Liquidity premium (as a percent)		0.39%
Paydown rate (as a percent)		9.70%
Predecessor | Level 3 | Discounted cash flow | Other asset-backed securities | Maximum
Unobservable Input
Liquidity premium (as a percent)		1.49%
Paydown rate (as a percent)		15.80%
Predecessor | Level 3 | Discounted cash flow | Other asset-backed securities | Weighted Average
Unobservable Input
Liquidity premium (as a percent)		0.69%
Paydown rate (as a percent)		12.08%
Predecessor | Level 3 | Embedded derivative - GMWB
Valuation of Level 3 Financial Instruments
Fair Value of Liabilities		25,927,000
Predecessor | Level 3 | Embedded derivative - GMWB | Actuarial cash flow model | Minimum
Unobservable Input
Mortality (as a percent)		44.50%
Lapse (as a percent)		0.25%
Utilization (as a percent)		97.00%
Nonperformance risk (as a percent)		0.12%
Predecessor | Level 3 | Embedded derivative - GMWB | Actuarial cash flow model | Maximum
Unobservable Input
Mortality (as a percent)		100.00%
Lapse (as a percent)		17.00%
Utilization (as a percent)		101.00%
Nonperformance risk (as a percent)		0.96%
Predecessor | Level 3 | Annuity account
Valuation of Level 3 Financial Instruments
Fair Value of Liabilities		97,825,000
Predecessor | Level 3 | Annuity account | Actuarial cash flow model
Unobservable Input
Withdrawal rate (as a percent)		2.20%
Predecessor | Level 3 | Annuity account | Actuarial cash flow model | Minimum
Unobservable Input
Mortality (as a percent)		49.00%
Lapse (as a percent)		2.20%
Nonperformance risk (as a percent)		0.12%
Asset earned rate (as a percent)		3.86%
Expenses per policy		88
Return on assets (as a percent)		1.50%
Predecessor | Level 3 | Annuity account | Actuarial cash flow model | Maximum
Unobservable Input
Mortality (as a percent)		80.00%
Lapse (as a percent)		33.00%
Nonperformance risk (as a percent)		0.96%
Asset earned rate (as a percent)		5.92%
Expenses per policy		102
Return on assets (as a percent)		1.85%
Predecessor | Level 3 | Embedded derivative - FIA
Valuation of Level 3 Financial Instruments
Fair Value of Liabilities		124,465,000
Predecessor | Level 3 | Embedded derivative - FIA | Actuarial cash flow model | Minimum
Unobservable Input
Mortality (as a percent)		49.00%
Lapse (as a percent)		2.50%
Nonperformance risk (as a percent)		0.12%
Expenses per policy		83
Withdrawal rate (as a percent)		1.10%
Predecessor | Level 3 | Embedded derivative - FIA | Actuarial cash flow model | Maximum
Unobservable Input
Mortality (as a percent)		80.00%
Lapse (as a percent)		40.00%
Nonperformance risk (as a percent)		0.96%
Expenses per policy		97
Withdrawal rate (as a percent)		4.50%
Predecessor | Level 3 | Embedded derivative - IUL
Valuation of Level 3 Financial Instruments
Fair Value of Liabilities		6,691,000
Predecessor | Level 3 | Embedded derivative - IUL | Actuarial cash flow model | Minimum
Unobservable Input
Mortality (as a percent)		37.00%
Lapse (as a percent)		0.50%
Nonperformance risk (as a percent)		0.12%
Predecessor | Level 3 | Embedded derivative - IUL | Actuarial cash flow model | Maximum
Unobservable Input
Mortality (as a percent)		74.00%
Lapse (as a percent)		10.00%
Nonperformance risk (as a percent)		0.96%
Predecessor | Level 3 | Corporate securities
Valuation of Level 3 Financial Instruments
Fair Value of Assets		1,282,864,000
Unobservable Input
Financial instruments that are valued using broker quotes		67,500,000
Predecessor | Level 3 | Corporate securities | Discounted cash flow | Minimum
Unobservable Input
Spread over treasury (as a percent)		0.33%
Predecessor | Level 3 | Corporate securities | Discounted cash flow | Maximum
Unobservable Input
Spread over treasury (as a percent)		7.50%
Predecessor | Level 3 | Corporate securities | Discounted cash flow | Weighted Average
Unobservable Input
Spread over treasury (as a percent)		2.19%