EQUITY INVESTMENTS AND INTERESTS IN JOINT VENTURES AND PARTNERSHIPS (Details 2) - USD ($) $ in Thousands	8 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2016	Dec. 31, 2015
Gain (Loss) on Investments [Line Items]
Net loss attributable to noncontrolling interests	$ 6,000	$ 11,800	$ 23,400
Equity Investments
Gain (Loss) on Investments [Line Items]
Net realized gains (losses)	(556)	(18,209)	12,456
Net (increase) decrease in unrealized losses	(30,168)	(27,729)	(28,297)
Net realized and unrealized gains (losses)	(30,724)	(45,938)	(15,841)
Interests in Joint Ventures and Partnerships
Gain (Loss) on Investments [Line Items]
Net realized gains (losses)	4,272	18,253	16,986
Net (increase) decrease in unrealized losses	(112,038)	(60,670)	(135,811)
Net realized and unrealized gains (losses)	$ (107,766)	$ (42,417)	$ (118,825)