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Summary of Aggregate Notional Amount and Fair Value of Derivative Financial Instruments (Detail) (USD $)
In Thousands, unless otherwise specified |
Sep. 30, 2013
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Dec. 31, 2012
|
|---|---|---|
| Derivatives, Fair Value [Line Items] | ||
| Derivative Assets, Notional | $ 2,427,718 | $ 1,306,817 |
| Derivative Liabilities, Notional | 1,379,602 | 1,035,631 |
| Derivative Assets, Fair Value | 80,642 | 99,374 |
| Derivative Liabilities, Fair Value | 19,380 | 22,070 |
|
Freestanding Derivatives | Interest Rate Contracts | Blackstone - Other
|
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| Derivatives, Fair Value [Line Items] | ||
| Derivative Assets, Notional | 1,914,476 | 689,300 |
| Derivative Liabilities, Notional | 1,035,600 | 636,555 |
| Derivative Assets, Fair Value | 44,545 | 55,270 |
| Derivative Liabilities, Fair Value | 4,673 | 4,116 |
|
Freestanding Derivatives | Interest Rate Contracts | Investment Of Consolidated CLO Vehicles
|
||
| Derivatives, Fair Value [Line Items] | ||
| Derivative Assets, Notional | 81,505 | 165,517 |
| Derivative Liabilities, Notional | 90,500 | |
| Derivative Assets, Fair Value | 3,653 | 6,132 |
| Derivative Liabilities, Fair Value | 772 | |
|
Freestanding Derivatives | Foreign Currency Contracts | Blackstone - Other
|
||
| Derivatives, Fair Value [Line Items] | ||
| Derivative Assets, Notional | 68,896 | 16,771 |
| Derivative Liabilities, Notional | 66,115 | 7,025 |
| Derivative Assets, Fair Value | 1,490 | 74 |
| Derivative Liabilities, Fair Value | 1,398 | 81 |
|
Freestanding Derivatives | Foreign Currency Contracts | Investment Of Consolidated CLO Vehicles
|
||
| Derivatives, Fair Value [Line Items] | ||
| Derivative Assets, Notional | 362,841 | 435,229 |
| Derivative Liabilities, Notional | 236,887 | 301,551 |
| Derivative Assets, Fair Value | 30,954 | 37,898 |
| Derivative Liabilities, Fair Value | 8,775 | 17,101 |
|
Freestanding Derivatives | Credit Default Swaps | Blackstone - Other
|
||
| Derivatives, Fair Value [Line Items] | ||
| Derivative Liabilities, Notional | 41,000 | |
| Derivative Liabilities, Fair Value | $ 4,534 |