v2.4.0.6
Financial Assets and Liabilities at Fair Value (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investment Funds $ 716,877 [1] $ 729,070 [1]
Equity Securities 324,254 [1] 345,787 [1]
Partnership and LLC Interests 548,588 [1] 492,911 [1]
Debt Instruments 741,474 [1] 607,059 [1]
Corporate Loans 11,427,207 [1] 7,895,148 [1]
Corporate Bonds 228,741 [1] 153,653 [1]
Freestanding Derivatives - Foreign Currency Contracts 38,247 [1] 22,016 [1]
Freestanding Derivatives - Interest Rate Contracts 8,203 [1] 7,270 [1]
Other 24,114 [1] 53,881 [1]
Investment of Consolidated Funds 14,057,705 [1] 10,306,795 [1]
Blackstone's Treasury Cash Management Strategies 738,886 685,859
Money Market Funds 135,663 257,423
Freestanding Derivatives, Assets 98,632 98,738
Loans and Receivables 104,207 8,555
Other Investments 30,491 28,390
Total Financial Assets 15,119,134 11,356,474
Senior Secured Notes 10,534,253 [1] 7,449,766 [1]
Subordinated Notes 701,648 [1] 630,236 [1]
Freestanding Derivatives - Foreign Currency Contracts 31,133 [1] 7,687 [1]
Freestanding Derivatives - Interest Rate Contracts 4,103 [1] 10,867 [1]
Securities Sold, Not Yet Purchased 88,153 143,825
Total Financial Liabilities 11,362,090 8,243,775
Interest Rate Contracts
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Freestanding Derivatives, Assets 52,009 768
Freestanding Derivatives, Liabilities 2,565 1,291
Foreign Currency Contracts
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Freestanding Derivatives, Assets 173 1,016
Freestanding Derivatives, Liabilities 125 103
Credit Default Swap
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Freestanding Derivatives, Liabilities 110  
Derivative Instruments Used As Fair Value Hedges
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Instruments Used as Fair Value Hedges   67,668
Level 1
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity Securities 83,439 [1] 113,007 [1]
Partnership and LLC Interests 183 [1]  
Other 328 [1] 28,900 [1]
Investment of Consolidated Funds 83,950 [1] 141,907 [1]
Blackstone's Treasury Cash Management Strategies 281,089 176,297
Money Market Funds 135,663 257,423
Other Investments 2,977 8,066
Total Financial Assets 504,288 583,852
Total Financial Liabilities 235 1,105
Level 1 | Interest Rate Contracts
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Freestanding Derivatives, Assets 609 159
Freestanding Derivatives, Liabilities 235 1,105
Level 2
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investment Funds 3,590 [1] 5,119 [1]
Equity Securities 28,506 [1] 608 [1]
Partnership and LLC Interests 490 [1]  
Debt Instruments 720,111 [1] 594,276 [1]
Corporate Loans 10,426,445 [1] 7,259,204 [1]
Corporate Bonds 191,512 [1] 150,653 [1]
Freestanding Derivatives - Foreign Currency Contracts 38,247 [1] 22,016 [1]
Freestanding Derivatives - Interest Rate Contracts 8,203 [1] 7,270 [1]
Other 16,495 [1] 21,973 [1]
Investment of Consolidated Funds 11,433,599 [1] 8,061,119 [1]
Blackstone's Treasury Cash Management Strategies 457,597 509,362
Other Investments 6,352 360
Total Financial Assets 11,949,121 8,640,134
Freestanding Derivatives - Foreign Currency Contracts 31,133 [1] 7,687 [1]
Freestanding Derivatives - Interest Rate Contracts 4,103 [1] 10,867 [1]
Securities Sold, Not Yet Purchased 88,153 143,825
Total Financial Liabilities 125,954 162,668
Level 2 | Interest Rate Contracts
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Freestanding Derivatives, Assets 51,400 609
Freestanding Derivatives, Liabilities 2,330 186
Level 2 | Foreign Currency Contracts
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Freestanding Derivatives, Assets 173 1,016
Freestanding Derivatives, Liabilities 125 103
Level 2 | Credit Default Swap
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Freestanding Derivatives, Liabilities 110  
Level 2 | Derivative Instruments Used As Fair Value Hedges
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Instruments Used as Fair Value Hedges   67,668
Level 3
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investment Funds 713,287 [1] 723,951 [1]
Equity Securities 212,309 [1] 232,172 [1]
Partnership and LLC Interests 547,915 [1] 492,911 [1]
Debt Instruments 21,363 [1] 12,783 [1]
Corporate Loans 1,000,762 [1] 635,944 [1]
Corporate Bonds 37,229 [1] 3,000 [1]
Other 7,291 [1] 3,008 [1]
Investment of Consolidated Funds 2,540,156 [1] 2,103,769 [1]
Blackstone's Treasury Cash Management Strategies 200 200
Loans and Receivables 104,207 8,555
Other Investments 21,162 19,964
Total Financial Assets 2,665,725 2,132,488
Senior Secured Notes 10,534,253 [1] 7,449,766 [1]
Subordinated Notes 701,648 [1] 630,236 [1]
Total Financial Liabilities $ 11,235,901 $ 8,080,002
[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 its investments in 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.