Reconciliation of Realized and Net Change in Unrealized Gains (Losses) to Other Income - Net Gains from Fund Investment Activities in Condensed Consolidated Statements of Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Gain (Loss) on Investments [Line Items]
Realized Gains	$ 13,713	$ 67,788
Net Change in Unrealized Gains (Losses)	(27,214)	(42,495)
Realized and Net Change in Unrealized Gains (Losses) from Consolidated Blackstone Funds	(13,501)	25,293
Interest and Dividend Revenue Attributable to Consolidated Blackstone Funds	83,656	41,917
Other Income - Net Gains from Fund Investment Activities	$ 70,155	$ 67,210