Realized and Net Change in Unrealized Gains (Losses) on Investments Held by Blackstone's Treasury Cash Management Strategies (Detail) - Blackstone's Treasury Cash Management Strategies - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2015 |
Sep. 30, 2014 |
Sep. 30, 2015 |
Sep. 30, 2014 |
|
| Gain (Loss) on Investments [Line Items] | ||||
| Realized Gains (Losses) | $ (3,003) | $ 2,142 | $ (6,606) | $ 6,307 |
| Net Change in Unrealized Gains (Losses) | (8,984) | (14,541) | (12,922) | 1,551 |
| Total realized and net change in unrealized gains (losses) | $ (11,987) | $ (12,399) | $ (19,528) | $ 7,858 |