FAIR VALUE OPTION - Change in Fair Value (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value, option, assets, net realized gains (losses)	$ (47,599)	$ (2,024)	$ (267,194)	$ 77,086
Fair value, option, liabilities, net realized gains (losses)	107,844	0	210,386	0
Fair value, option, assets, net unrealized gains (losses)	81,437	(290,966)	434,652	(125,568)
Fair value, option, liabilities, net unrealized gains (losses)	68,658	69,853	(378,505)	(44,650)
Private Equity
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value, option, assets, net realized gains (losses)	0	0	0	111,676
Fair value, option, assets, net unrealized gains (losses)	(446)	(13,921)	(2,744)	72,777
Credit
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value, option, assets, net realized gains (losses)	(31,310)	(11,774)	(26,293)	(14,944)
Fair value, option, assets, net unrealized gains (losses)	12,376	(25,793)	(29,662)	(67,364)
Investments of Consolidated CFEs
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value, option, assets, net realized gains (losses)	(18,697)	(341)	(239,502)	(26,494)
Fair value, option, assets, net unrealized gains (losses)	40,049	(157,045)	547,099	(79,651)
Real Assets
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value, option, assets, net realized gains (losses)	2,945	0	2,945	0
Fair value, option, assets, net unrealized gains (losses)	(2,051)	4,214	8,544	13,354
Equity Method
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value, option, assets, net realized gains (losses)	225	7,703	(1,766)	7,703
Fair value, option, assets, net unrealized gains (losses)	42,525	(67,287)	(58,572)	(36,159)
Other
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value, option, assets, net realized gains (losses)	(762)	2,388	(2,578)	(855)
Fair value, option, assets, net unrealized gains (losses)	(11,016)	(31,134)	(30,013)	(28,525)
Debt Obligations of Consolidated CFEs
Fair Value, Option, Quantitative Disclosures [Line Items]
Fair value, option, liabilities, net realized gains (losses)	107,844	0	210,386	0
Fair value, option, liabilities, net unrealized gains (losses)	$ 68,658	$ 69,853	$ (378,505)	$ (44,650)