EQUITY-BASED COMPENSATION - Summary of Non-vested restricted stock award activity (Details 4) - Non-vested restricted stock shares in Thousands |
12 Months Ended |
|---|---|
|
Dec. 31, 2016
$ / shares
shares
| |
| Shares | |
| Outstanding, as of January 1, 2016 | shares | 538 |
| Granted | shares | 432 |
| Vested | shares | (168) |
| Forfeited | shares | (139) |
| Outstanding, as of December 31, 2016 | shares | 663 |
| Weighted Average Grant Date Fair Value | |
| Outstanding, as of January 1, 2016 | $ / shares | $ 9.59 |
| Granted | $ / shares | 7.14 |
| Vested | $ / shares | 9.12 |
| Forfeited | $ / shares | 9.70 |
| Outstanding, as of December 31, 2016 | $ / shares | $ 8.08 |