EQUITY-BASED COMPENSATION - Awards Delivered (Details) - Common Class A Shares - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Class A shares delivered (in shares) | 435,787 | 2,377,034 | 9,253,602 | |
| Gross value of shares | $ 13,636 | $ 77,103 | $ 96,437 | $ 261,566 |
| Common Stock | ||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Class A shares delivered (in shares) | 4,246,760 | |||
| Payments related to deliveries of Class A shares for RSUs and restricted shares (in shares) | 4,245,086 | 9,478,427 | ||