v2.4.0.6
Clawback Obligations by Segment (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Schedule Of Commitments And Contingencies [Line Items]    
Clawback obligations $ 261,007 $ 266,300
Private Equity
    
Schedule Of Commitments And Contingencies [Line Items]    
Clawback obligations 203,748 196,800
Real Estate
    
Schedule Of Commitments And Contingencies [Line Items]    
Clawback obligations 57,251 69,500
Credit Businesses
    
Schedule Of Commitments And Contingencies [Line Items]    
Clawback obligations 8  
Blackstone Holdings
    
Schedule Of Commitments And Contingencies [Line Items]    
Clawback obligations partnerships 100,252 98,885
Blackstone Holdings | Private Equity
    
Schedule Of Commitments And Contingencies [Line Items]    
Clawback obligations partnerships 69,412 68,044
Blackstone Holdings | Real Estate
    
Schedule Of Commitments And Contingencies [Line Items]    
Clawback obligations partnerships 30,840 30,841
Current And Former Blackstone Personnel
    
Schedule Of Commitments And Contingencies [Line Items]    
Clawback obligations Current and Former Personnel 160,755 167,415
Current And Former Blackstone Personnel | Private Equity
    
Schedule Of Commitments And Contingencies [Line Items]    
Clawback obligations Current and Former Personnel 134,336 128,756
Current And Former Blackstone Personnel | Real Estate
    
Schedule Of Commitments And Contingencies [Line Items]    
Clawback obligations Current and Former Personnel 26,411 38,659
Current And Former Blackstone Personnel | Credit Businesses
    
Schedule Of Commitments And Contingencies [Line Items]    
Clawback obligations Current and Former Personnel $ 8