FAIR VALUE OF FINANCIAL INSTRUMENTS (Details 3) - Successor Company - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Reconciliation of liabilities measured on Level 3 basis
Transfers from Level 1 into Level 2	$ 0	$ 0
Transfers from Level 2 into Level 1	0	0
Collateralized Loan Obligation Secured Notes
Reconciliation of liabilities measured on Level 3 basis
Balance at the beginning of the period	0	5,501,099,000
Included in earnings		0
Transfers into Level 3		0
Transfers out of level 3		(5,501,099,000)
Purchases		0
Sales		0
Settlements		0
Balance at the end of the period		0
Change in unrealized gains or losses for the period included in earnings for liabilities held at the end of the reporting period		0
Corporate Debt Securities
Reconciliation of assets measured on Level 3 basis
Balance at the beginning of the period	194,986,000	317,034,000
Included in earnings	(30,466,000)	(37,716,000)
Transfers into Level 3	11,739,000	0
Transfers out of Level 3	0	0
Purchases	0	10,001,000
Sales	(3,145,000)	(98,539,000)
Settlements	2,092,000	4,206,000
Balance at the end of the period	175,206,000	194,986,000
Change in unrealized gains or losses for the period included in earnings for assets held at the end of the reporting period	(30,466,000)	(45,488,000)
Residential Mortgage- Backed Securities
Reconciliation of assets measured on Level 3 basis
Balance at the beginning of the period	49,621,000	55,184,000
Included in earnings	2,486,000	8,398,000
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Purchases	0	0
Sales	0	0
Settlements	(11,444,000)	(13,961,000)
Balance at the end of the period	40,663,000	49,621,000
Change in unrealized gains or losses for the period included in earnings for assets held at the end of the reporting period	2,483,000	2,273,000
Corporate loans, at estimated fair value
Reconciliation of assets measured on Level 3 basis
Balance at the beginning of the period	298,734,000	347,077,000
Included in earnings	(70,721,000)	(69,384,000)
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Purchases	7,283,000	12,775,000
Sales	(44,441,000)	(25,511,000)
Settlements	(61,661,000)	33,777,000
Balance at the end of the period	129,194,000	298,734,000
Change in unrealized gains or losses for the period included in earnings for assets held at the end of the reporting period	(70,721,000)	(67,368,000)
Equity Investments, at Estimated Fair Value
Reconciliation of assets measured on Level 3 basis
Balance at the beginning of the period	146,648,000	81,719,000
Included in earnings	(42,515,000)	(42,472,000)
Transfers into Level 3	49,065,000	0
Transfers out of Level 3	0	0
Purchases	1,142,000	0
Sales	(16,289,000)	0
Settlements	(5,746,000)	107,401,000
Balance at the end of the period	132,305,000	146,648,000
Change in unrealized gains or losses for the period included in earnings for assets held at the end of the reporting period	(42,515,000)	(41,776,000)
Interests in Joint Ventures and Partnerships
Reconciliation of assets measured on Level 3 basis
Balance at the beginning of the period	888,408,000	718,772,000
Included in earnings	(45,687,000)	(141,386,000)
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Purchases	79,782,000	351,184,000
Sales	0	0
Settlements	(128,507,000)	(40,162,000)
Balance at the end of the period	793,996,000	888,408,000
Change in unrealized gains or losses for the period included in earnings for assets held at the end of the reporting period	(45,687,000)	(141,386,000)
Foreign Exchange Options, Net
Reconciliation of assets measured on Level 3 basis
Balance at the beginning of the period	2,887,000	0
Included in earnings	(1,768,000)	2,887,000
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Purchases	0	0
Sales	(127,000)	0
Settlements	0	0
Balance at the end of the period	992,000	2,887,000
Change in unrealized gains or losses for the period included in earnings for assets held at the end of the reporting period	(1,768,000)	2,887,000
Warrants
Reconciliation of assets measured on Level 3 basis
Balance at the beginning of the period	0	0
Included in earnings	(757,000)	(2,412,000)
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Purchases	0	0
Sales	0	0
Settlements	2,285,000	2,412,000
Balance at the end of the period	1,528,000	0
Change in unrealized gains or losses for the period included in earnings for assets held at the end of the reporting period	(757,000)	(2,412,000)
Options
Reconciliation of assets measured on Level 3 basis
Balance at the beginning of the period	95,000	5,212,000
Included in earnings	906,000	(5,117,000)
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Purchases	0	0
Sales	0	0
Settlements	0	0
Balance at the end of the period	1,001,000	95,000
Change in unrealized gains or losses for the period included in earnings for assets held at the end of the reporting period	$ 906,000	$ (5,117,000)