Carrying Value and Fair Value of Blackstone Issued Notes (Detail) - Senior Secured Notes - USD ($) $ in Thousands |
Sep. 30, 2015 |
Dec. 31, 2014 |
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|---|---|---|---|---|---|---|---|---|---|---|
| 6.625% Notes | ||||||||||
| Debt Instrument [Line Items] | ||||||||||
| Carrying value of issued notes | [1] | $ 616,925 | $ 622,552 | [2] | ||||||
| Debt instrument, fair value | [1],[3] | 681,876 | 684,158 | |||||||
| 5.875% Notes | ||||||||||
| Debt Instrument [Line Items] | ||||||||||
| Carrying value of issued notes | 397,627 | 397,357 | [2] | |||||||
| Debt instrument, fair value | [3] | 459,960 | 462,360 | |||||||
| 4.750% Notes | ||||||||||
| Debt Instrument [Line Items] | ||||||||||
| Carrying value of issued notes | 391,998 | 391,344 | [2] | |||||||
| Debt instrument, fair value | [3] | 434,960 | 436,240 | |||||||
| 6.250% Notes | ||||||||||
| Debt Instrument [Line Items] | ||||||||||
| Carrying value of issued notes | 237,605 | 237,487 | [2] | |||||||
| Debt instrument, fair value | [3] | 295,100 | 307,125 | |||||||
| 5.000% Notes | ||||||||||
| Debt Instrument [Line Items] | ||||||||||
| Carrying value of issued notes | 487,960 | 487,966 | [2] | |||||||
| Debt instrument, fair value | [3] | 515,500 | $ 527,500 | |||||||
| 4.450% Notes | ||||||||||
| Debt Instrument [Line Items] | ||||||||||
| Carrying value of issued notes | 343,777 | |||||||||
| Debt instrument, fair value | [3] | 332,780 | ||||||||
| 2.000% Notes | ||||||||||
| Debt Instrument [Line Items] | ||||||||||
| Carrying value of issued notes | 331,854 | |||||||||
| Debt instrument, fair value | [3] | $ 329,978 | ||||||||
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