NET GAINS (LOSSES) FROM INVESTMENT ACTIVITIES (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Total Net Gains (Losses) from Investment Activities
Net Realized Gains (Losses)	$ 966,246	$ 553,020
Net Unrealized Gains (Losses)	1,303,571	2,533,845
Real Assets
Total Net Gains (Losses) from Investment Activities
Net Unrealized Gains (Losses)	35,735	(98,274)
Equity Method
Total Net Gains (Losses) from Investment Activities
Net Realized Gains (Losses)	4,919
Net Unrealized Gains (Losses)	22,610	24,745
Private Equity
Total Net Gains (Losses) from Investment Activities
Net Realized Gains (Losses)	891,927	527,976
Net Unrealized Gains (Losses)	1,015,800	2,554,669
Fixed Income and Other
Total Net Gains (Losses) from Investment Activities
Net Realized Gains (Losses)	92,632	50,613
Net Unrealized Gains (Losses)	19,044	133,574
Foreign Exchange Forward Contracts
Total Net Gains (Losses) from Investment Activities
Net Realized Gains (Losses)	15,743	14,830
Net Unrealized Gains (Losses)	206,871	(66,440)
Foreign Currency Options
Total Net Gains (Losses) from Investment Activities
Net Realized Gains (Losses)		(10,740)
Net Unrealized Gains (Losses)	5,606	7,830
Securities Sold Short
Total Net Gains (Losses) from Investment Activities
Net Realized Gains (Losses)	(23,272)	(26,829)
Net Unrealized Gains (Losses)	(10,771)	(12,381)
Other Derivative
Total Net Gains (Losses) from Investment Activities
Net Realized Gains (Losses)	(13,517)	(3,063)
Net Unrealized Gains (Losses)	4,066	(201)
Contingent Carried Interest Repayment Guarantee
Total Net Gains (Losses) from Investment Activities
Net Unrealized Gains (Losses)		(8,687)
Foreign Exchange Gains (Losses) on Debt Obligations
Total Net Gains (Losses) from Investment Activities
Net Realized Gains (Losses)		233
Net Unrealized Gains (Losses)	3,687	(873)
Foreign Exchange Gains (Losses) on Cash and Cash Equivalents held at Consolidated Entities
Total Net Gains (Losses) from Investment Activities
Net Unrealized Gains (Losses)	196	(117)
Foreign Exchange Gains (Losses) on Cash and Cash Equivalents
Total Net Gains (Losses) from Investment Activities
Net Realized Gains (Losses)	(2,186)
Net Unrealized Gains (Losses)	$ 727