DEBT AND OTHER OBLIGATIONS (Details) $ in Thousands					1 Months Ended	5 Months Ended	6 Months Ended		12 Months Ended
	Feb. 03, 2015	Feb. 02, 2015 USD ($)	Feb. 01, 2015 USD ($)	Oct. 10, 2012 USD ($)	Jan. 31, 2015 USD ($)	Jun. 30, 2015 USD ($) item	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)	Jun. 25, 2014 USD ($)	Aug. 07, 2013 USD ($)	Dec. 10, 2010 USD ($)	Apr. 23, 2010 USD ($)
Debt and other obligations
Total debt						$ 1,662,739	$ 1,662,739
Total subordinated debt securities						452,424	452,424
Non-recourse funding obligations						656,299	656,299
Repurchase program borrowings						602,213	602,213
Collateral pledged for repurchase agreements						657,372	657,372
Overnight and Continuous
Debt and other obligations
Collateral pledged for repurchase agreements						549,591	549,591
Up to 30 days
Debt and other obligations
Collateral pledged for repurchase agreements						107,781	107,781
U.S. government-related securities.
Debt and other obligations
Collateral pledged for repurchase agreements						98,345	98,345
U.S. government-related securities. | Overnight and Continuous
Debt and other obligations
Collateral pledged for repurchase agreements						98,345	98,345
Corporate securities
Debt and other obligations
Collateral pledged for repurchase agreements						107,781	107,781
Corporate securities | Up to 30 days
Debt and other obligations
Collateral pledged for repurchase agreements						107,781	107,781
Loans
Debt and other obligations
Collateral pledged for repurchase agreements						451,246	451,246
Loans | Overnight and Continuous
Debt and other obligations
Collateral pledged for repurchase agreements						451,246	451,246
Golden Gate II
Debt and other obligations
Non-recourse funding obligations						118,274	118,274
Non-recourse funding obligations held by external parties						144,900	144,900
Non-recourse funding obligations held by affiliates						430,100	430,100
Payments under support agreement obligation						0	0
Amount of support agreement obligations collateralized						1,900	$ 1,900
Year-to-date weighted-average interest rate of non-recourse funding obligations (as a percent)							1.32%
Outstanding non-recourse funding obligations						575,000	$ 575,000
Golden Gate V and Red Mountain
Debt and other obligations
Term of transaction				20 years
Maximum financing capacity under transaction				$ 945,000
Payments under support agreement obligation						$ 0	$ 0
Golden Gate V
Debt and other obligations
Stated interest rate (as a percent)						6.25%	6.25%
Maximum financing capacity under transaction						$ 945,000	$ 945,000
Non-recourse funding obligations						535,474	$ 535,474
Year-to-date weighted-average interest rate of non-recourse funding obligations (as a percent)							5.12%
Outstanding non-recourse funding obligations						470,000	$ 470,000
Red Mountain
Debt and other obligations
Maximum financing capacity under transaction				945,000
Principal amount of note issued				$ 275,000		470,000	470,000
Future scheduled capital contributions						139,600
Golden Gate III
Debt and other obligations
Payments under support agreement obligation						0	0
Future scheduled capital contributions						122,500
Maximum borrowing capacity under letter of credit										$ 915,000	$ 710,000		$ 505,000
Maximum amount up to which LOC will be periodically increased										$ 935,000	$ 720,000		$ 610,000
Outstanding letters of credit (LOC)						$ 935,000	935,000
Letter of credit term						15 years
Number of installments in which future scheduled capital contributions payable | item						3
Golden Gate IV
Debt and other obligations
Payments under support agreement obligation						$ 0	0
Maximum borrowing capacity under letter of credit						770,000	770,000					$ 270,000
Maximum amount up to which LOC will be periodically increased						$ 790,000	790,000
Letter of credit term						12 years
MONY
Debt and other obligations
Non-recourse funding obligations						$ 2,551	$ 2,551
Year-to-date weighted-average interest rate of non-recourse funding obligations (as a percent)							6.19%
Predecessor
Debt and other obligations
Total debt									$ 1,300,000
Total subordinated debt securities									540,593
Non-recourse funding obligations									582,404
Repurchase program borrowings									50,000
Outstanding nonrecourse funding obligations repurchased at discount								$ 18,300
Gain from repurchase of outstanding nonrecourse funding obligations								$ 4,600
Repurchase Program Borrowings
Debt and other obligations
Fair value of securities pledged under the repurchase program						657,400	$ 657,400
Repurchase program borrowings						$ 602,200	602,200
Average borrowing rate (as a percent)						0.21%
Maximum balance outstanding						$ 646,700	646,700
Average daily balance						$ 507,200	$ 507,200
Average borrowing rate (as a percent)						0.17%
Repurchase Program Borrowings | Maximum
Debt and other obligations
Term of debt							90 days
Repurchase Program Borrowings | Predecessor
Debt and other obligations
Maximum balance outstanding					$ 175,000				633,700
Average daily balance					$ 77,400				$ 470,400
Average borrowing rate (as a percent)					0.16%				0.11%
Outstanding balance									$ 50,000
Credit Facility
Debt and other obligations
Total debt						$ 545,000	$ 545,000
Line of credit, maximum borrowing capacity			$ 750,000
Line of credit, maximum borrowing capacity to be granted upon entity's request			$ 1,000,000
Base of floating rate interest rate payments			LIBOR
Facility fee percentage			0.175%
Credit Facility | Federal Funds Rate
Debt and other obligations
Base of floating rate interest rate payments			Federal Funds rate
Interest rate added to the base rate (as a percent)			0.50%
Credit Facility | Prime Rate
Debt and other obligations
Base of floating rate interest rate payments			prime rate
Credit Facility | LIBOR One-Month Rate
Debt and other obligations
Base of floating rate interest rate payments			one-month LIBOR
Interest rate added to the base rate (as a percent)			1.00%
Credit Facility | Predecessor
Debt and other obligations
Total debt									450,000
Line of credit, amount outstanding									$ 450,000
Credit Facility | Predecessor | LIBOR
Debt and other obligations
Base of floating rate interest rate payments									LIBOR
Interest rate added to the base rate (as a percent)									1.20%
Letter of Credit | PLICO
Debt and other obligations
Previously executed Letter of Credit no longer issued and outstanding						55,000	55,000
Letter of Credit | Predecessor | PLICO
Debt and other obligations
Outstanding letters of credit (LOC)									$ 55,000
2015 Credit Facility
Debt and other obligations
Line of credit, maximum borrowing capacity		$ 1,000,000
Line of credit, maximum borrowing capacity to be granted upon entity's request		$ 1,250,000
Base of floating rate interest rate payments		LIBOR
Facility fee percentage	0.125%	0.15%
Line of credit, amount outstanding						$ 545,000	$ 545,000
2015 Credit Facility | LIBOR
Debt and other obligations
Base of floating rate interest rate payments						LIBOR
Interest rate added to the base rate (as a percent)						1.00%
2015 Credit Facility | Federal Funds Rate
Debt and other obligations
Base of floating rate interest rate payments		Federal Funds rate
Interest rate added to the base rate (as a percent)		0.50%
2015 Credit Facility | Prime Rate
Debt and other obligations
Base of floating rate interest rate payments		Prime rate
2015 Credit Facility | LIBOR One-Month Rate
Debt and other obligations
Base of floating rate interest rate payments		one-month LIBOR
Interest rate added to the base rate (as a percent)		1.00%
6.40% Senior Notes (2007), due 2018
Debt and other obligations
Stated interest rate (as a percent)						6.40%	6.40%
Total debt						$ 165,625	$ 165,625
6.40% Senior Notes (2007), due 2018 | Predecessor
Debt and other obligations
Total debt									150,000
7.375% Senior Notes (2009), due 2019
Debt and other obligations
Stated interest rate (as a percent)						7.375%	7.375%
Total debt						$ 482,183	$ 482,183
7.375% Senior Notes (2009), due 2019 | Predecessor
Debt and other obligations
Total debt									400,000
8.45% Senior Notes (2009), due 2039
Debt and other obligations
Stated interest rate (as a percent)						8.45%	8.45%
Total debt						$ 469,931	$ 469,931
8.45% Senior Notes (2009), due 2039 | Predecessor
Debt and other obligations
Total debt									$ 300,000
6.125% Subordinated Debentures (2004), due 2034, callable 2009
Debt and other obligations
Stated interest rate (as a percent)						6.125%	6.125%
Repayment of debt						$ 103,100
6.125% Subordinated Debentures (2004), due 2034, callable 2009 | Predecessor
Debt and other obligations
Stated interest rate (as a percent)									6.125%
Total subordinated debt securities									$ 103,093
6.25% Subordinated Debentures (2012) due 2042, callable 2017
Debt and other obligations
Stated interest rate (as a percent)						6.25%	6.25%
Total subordinated debt securities						$ 298,659	$ 298,659
6.25% Subordinated Debentures (2012) due 2042, callable 2017 | Predecessor
Debt and other obligations
Total subordinated debt securities									287,500
6.00% Subordinated Debentures (2012) due 2042, callable 2017
Debt and other obligations
Stated interest rate (as a percent)						6.00%	6.00%
Total subordinated debt securities						$ 153,765	$ 153,765
6.00% Subordinated Debentures (2012) due 2042, callable 2017 | Predecessor
Debt and other obligations
Total subordinated debt securities									$ 150,000
Non-recourse Funding Obligations Series | Golden Gate
Debt and other obligations
Number of series of non-recourse funding obligations | item						3
Non-recourse funding obligations						$ 800,000	$ 800,000
Series A1 Non-recourse Funding Obligation | Golden Gate
Debt and other obligations
Stated interest rate (as a percent)						7.375%	7.375%
Non-recourse funding obligations						$ 400,000	$ 400,000
Series A2 Non-recourse Funding Obligation | Golden Gate
Debt and other obligations
Stated interest rate (as a percent)						8.00%	8.00%
Non-recourse funding obligations						$ 100,000	$ 100,000
Series A3 Non-recourse Funding Obligation | Golden Gate
Debt and other obligations
Stated interest rate (as a percent)						8.45%	8.45%
Non-recourse funding obligations						$ 300,000	$ 300,000