v2.4.0.8
Financial Assets and Liabilities at Fair Value (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investment Funds $ 1,096,331 [1] $ 892,264 [1]
Equity Securities 374,268 [1] 341,612 [1]
Partnership and LLC Interests 660,322 [1] 593,738 [1]
Debt Instruments 1,202,617 [1] 920,847 [1]
Corporate Loans 8,800,348 [1] 11,053,513 [1]
Corporate Bonds 146,086 [1] 162,456 [1]
Other 14,348 [1] 18,285 [1]
Investments of Consolidated Funds 12,328,927 [1] 14,026,745 [1]
Blackstone's Treasury Cash Management Strategies 1,066,170 1,411,680
Money Market Funds 229,914 129,549
Freestanding Derivatives, Assets 80,642 99,374
Securities Sold, Not Yet Purchased 101,581 226,425
Total Financial Liabilities 9,367,848 11,790,102
Loans and Receivables 98,077 30,663
Other Investments 86,138 46,124
Total Financial Assets 13,855,261 15,700,105
Senior Secured Notes 8,641,507 [1] 10,695,136 [1]
Subordinated Notes 605,380 [1] 846,471 [1]
Freestanding Derivatives - Foreign Currency Contracts 8,775 [1] 17,101 [1]
Freestanding Derivatives - Interest Rate Contracts   772 [1]
Foreign Currency Contracts
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Freestanding Derivatives - Foreign Currency Contracts 30,954 [1] 37,898 [1]
Freestanding Derivatives, Assets 1,490 74
Freestanding Derivatives, Liabilities 1,398 81
Interest Rate Contracts
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Freestanding Derivatives - Interest Rate Contracts 3,653 [1] 6,132 [1]
Freestanding Derivatives, Assets 44,545 55,270
Freestanding Derivatives, Liabilities 4,673 4,116
Credit Default Swaps
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Freestanding Derivatives, Liabilities 4,534  
Level 1
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity Securities 110,951 [1] 95,898 [1]
Partnership and LLC Interests   212 [1]
Other 14 [1]  
Investments of Consolidated Funds 110,965 [1] 96,110 [1]
Blackstone's Treasury Cash Management Strategies 169,860 672,766
Money Market Funds 229,914 129,549
Total Financial Liabilities 4,535 277
Other Investments 63,671 12,443
Total Financial Assets 579,417 911,354
Level 1 | Interest Rate Contracts
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Freestanding Derivatives, Assets 5,007 486
Freestanding Derivatives, Liabilities 4,535 277
Level 2
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investment Funds   1,799 [1]
Equity Securities 16,828 [1] 28,654 [1]
Partnership and LLC Interests 7,892 [1] 12,375 [1]
Debt Instruments 1,143,086 [1] 903,123 [1]
Corporate Loans 7,749,081 [1] 9,775,070 [1]
Corporate Bonds 143,415 [1] 146,625 [1]
Other 994 [1] 1,260 [1]
Investments of Consolidated Funds 9,095,903 [1] 10,912,936 [1]
Blackstone's Treasury Cash Management Strategies 850,250 737,708
Securities Sold, Not Yet Purchased 101,581 226,425
Total Financial Liabilities 116,426 248,218
Other Investments 7,204 6,783
Total Financial Assets 9,994,385 11,712,285
Freestanding Derivatives - Foreign Currency Contracts 8,775 [1] 17,101 [1]
Freestanding Derivatives - Interest Rate Contracts   772 [1]
Level 2 | Foreign Currency Contracts
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Freestanding Derivatives - Foreign Currency Contracts 30,954 [1] 37,898 [1]
Freestanding Derivatives, Assets 1,490 74
Freestanding Derivatives, Liabilities 1,398 81
Level 2 | Interest Rate Contracts
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Freestanding Derivatives - Interest Rate Contracts 3,653 [1] 6,132 [1]
Freestanding Derivatives, Assets 39,538 54,784
Freestanding Derivatives, Liabilities 138 3,839
Level 2 | Credit Default Swaps
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Freestanding Derivatives, Liabilities 4,534  
Level 3
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investment Funds 1,096,331 [1] 890,465 [1]
Equity Securities 246,489 [1] 217,060 [1]
Partnership and LLC Interests 652,430 [1] 581,151 [1]
Debt Instruments 59,531 [1] 17,724 [1]
Corporate Loans 1,051,267 [1] 1,278,443 [1]
Corporate Bonds 2,671 [1] 15,831 [1]
Other 13,340 [1] 17,025 [1]
Investments of Consolidated Funds 3,122,059 [1] 3,017,699 [1]
Blackstone's Treasury Cash Management Strategies 46,060 1,206
Total Financial Liabilities 9,246,887 11,541,607
Loans and Receivables 98,077 30,663
Other Investments 15,263 26,898
Total Financial Assets 3,281,459 3,076,466
Senior Secured Notes 8,641,507 [1] 10,695,136 [1]
Subordinated Notes $ 605,380 [1] $ 846,471 [1]
[1] Pursuant to GAAP consolidation guidance, the Partnership is required to consolidate all VIEs in which it has been identified as the primary beneficiary, including certain CLO vehicles, and other funds in which a consolidated entity of the Partnership, as the general partner of the fund, is presumed to have control. While the Partnership is required to consolidate certain funds, including CLO vehicles, for GAAP purposes, the Partnership has no ability to utilize the assets of these funds and there is no recourse to the Partnership for their liabilities since these are client assets and liabilities.