v2.4.0.8
Clawback Obligations by Segment (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Schedule Of Commitments And Contingencies [Line Items]    
Clawback obligations $ 4,001 $ 4,270
Private Equity Segment
    
Schedule Of Commitments And Contingencies [Line Items]    
Clawback obligations   146
Real Estate Segment
    
Schedule Of Commitments And Contingencies [Line Items]    
Clawback obligations 1,885 2,019
Credit Segment
    
Schedule Of Commitments And Contingencies [Line Items]    
Clawback obligations 2,116 2,105
Blackstone Holdings Finance Co. L.L.C.
    
Schedule Of Commitments And Contingencies [Line Items]    
Clawback obligations partnerships 445 2,709
Blackstone Holdings Finance Co. L.L.C. | Private Equity Segment
    
Schedule Of Commitments And Contingencies [Line Items]    
Clawback obligations partnerships   (5)
Blackstone Holdings Finance Co. L.L.C. | Real Estate Segment
    
Schedule Of Commitments And Contingencies [Line Items]    
Clawback obligations partnerships 445 1,501
Blackstone Holdings Finance Co. L.L.C. | Credit Segment
    
Schedule Of Commitments And Contingencies [Line Items]    
Clawback obligations partnerships   1,213
Current And Former Blackstone Personnel
    
Schedule Of Commitments And Contingencies [Line Items]    
Clawback obligations Current and Former Personnel 3,556 1,561
Current And Former Blackstone Personnel | Private Equity Segment
    
Schedule Of Commitments And Contingencies [Line Items]    
Clawback obligations Current and Former Personnel   151
Current And Former Blackstone Personnel | Real Estate Segment
    
Schedule Of Commitments And Contingencies [Line Items]    
Clawback obligations Current and Former Personnel 1,440 518
Current And Former Blackstone Personnel | Credit Segment
    
Schedule Of Commitments And Contingencies [Line Items]    
Clawback obligations Current and Former Personnel $ 2,116 $ 892