DEBT AND OTHER OBLIGATIONS (Details)				1 Months Ended	11 Months Ended	12 Months Ended
	Jan. 15, 2016 USD ($)	Feb. 02, 2015 USD ($)	Oct. 10, 2012 USD ($)	Jan. 31, 2015 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Jun. 30, 2016 USD ($)	Jan. 14, 2015 USD ($) funding_obligation
2015 Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 1,000,000,000
Maximum borrowing capacity granted upon request		$ 1,250,000,000
Initial facility fee rate		0.15%
Adjusted facility fee rate		0.125%
Financing Agreement With Golden Gate And Syndicate Of Risk Takers
Debt Instrument [Line Items]
Term of financing agreement	18 years
Financing capacity under the agreement	$ 2,188,000,000
Golden Gate | Series Of Non Recourse Funding Obligations
Debt Instrument [Line Items]
Outstanding non-recourse funding obligations	800,000,000
Golden Gate V Vermont Captive Insurance Company And Red Mountain L L C
Debt Instrument [Line Items]
Transaction period			20 years
Maximum financing under transaction			$ 945,000,000
Red Mountain
Debt Instrument [Line Items]
Initial principal amount			275,000,000
Future maximum financing amount			$ 945,000,000
Credit enhancement term			20 years
Golden Gate V
Debt Instrument [Line Items]
Interest rate						6.25%
Maximum principal amount						$ 945,000,000
Base rate | 2015 Credit Facility
Debt Instrument [Line Items]
Variable spread on base rate		0.50%
One Month LIBOR | 2015 Credit Facility
Debt Instrument [Line Items]
Variable rate basis		one month LIBOR
Variable spread on base rate		1.00%
Surplus Notes | Golden Gate | Steel City Notes
Debt Instrument [Line Items]
Amount of debt issued	2,188,000,000
Surplus Notes | Steel City | Golden Gate Surplus Notes
Debt Instrument [Line Items]
Amount of debt issued	2,188,000,000
Successor
Debt Instrument [Line Items]
Letter of credit outstanding						0
Non-recourse funding obligations					$ 1,951,563,000	2,973,829,000	$ 1,951,563,000
Repurchase of non-recourse funding obligations, at a discount					0	86,300,000
Payments under agreement					65,000,000	$ 2,169,700,000
Successor | 2012 Credit Facility
Debt Instrument [Line Items]
Credit facility outstanding balance									$ 30,000,000
Successor | PLC | 2015 Credit Facility
Debt Instrument [Line Items]
Variable spread on base rate						1.00%
Credit facility outstanding balance						$ 170,000,000
Successor | Golden Gate | Series Of Non Recourse Funding Obligations
Debt Instrument [Line Items]
Extinguishment of notes	$ 800,000,000
Successor | Golden Gate Captive Insurance Company (Golden Gate)
Debt Instrument [Line Items]
Payments made under agreement						0
Non-recourse funding obligations					1,148,237,000	$ 2,116,000,000	$ 1,148,237,000
Fixed annual rate						4.75%	4.66%
Successor | Golden Gate Captive Insurance Company (Golden Gate) | Non-recourse funding obligations
Debt Instrument [Line Items]
Number of non-recourse funding obligations | funding_obligation										3
Non-recourse funding obligation outstanding balance										$ 800,000,000
Successor | Golden Gate Captive Insurance Company (Golden Gate) | Series A1 non-recourse funding obligations
Debt Instrument [Line Items]
Non-recourse funding obligation outstanding balance										$ 400,000,000
Interest rate										7.375%
Successor | Golden Gate Captive Insurance Company (Golden Gate) | Series A2 non-recourse funding obligations
Debt Instrument [Line Items]
Non-recourse funding obligation outstanding balance										$ 100,000,000
Interest rate										8.00%
Successor | Golden Gate Captive Insurance Company (Golden Gate) | Series A3 non-recourse funding obligations
Debt Instrument [Line Items]
Non-recourse funding obligation outstanding balance										$ 300,000,000
Interest rate										8.45%
Successor | Golden Gate II Captive Insurance Company (Golden Gate II)
Debt Instrument [Line Items]
Payments made under agreement						$ 0
Non-recourse funding obligations					236,123,000	$ 227,338,000	$ 236,123,000
Fixed annual rate						1.30%	1.22%
Outstanding non-recourse funding obligations						$ 575,000,000
Non-recourse funding held by external parties						58,600,000
Non-recourse funding held by nonconsolidated affiliates						220,300,000
Non-recourse funding held by consolidated subsidiaries						296,100,000
Collateralized obligations under supper agreements						1,500,000
Successor | Red Mountain
Debt Instrument [Line Items]
Principal balance						565,000,000
Payments under agreement						0
Successor | Golden Gate V
Debt Instrument [Line Items]
Non-recourse funding obligations					$ 564,679,000	$ 628,025,000	$ 564,679,000
Fixed annual rate						5.12%	5.12%
Future scheduled capital contributions						$ 128,300,000
Outstanding non-recourse funding obligation						565,000,000
Successor | Surplus Notes | Golden Gate | Steel City Notes
Debt Instrument [Line Items]
Amount of debt issued						$ 2,116,000,000
Predecessor
Debt Instrument [Line Items]
Repurchase of non-recourse funding obligations, at a discount				$ 0
Payments under agreement				$ 0				$ 32,348,000