Equity Compensation (Restricted Stock Units) (Details) - Restricted stock units |
6 Months Ended |
|---|---|
|
Jun. 30, 2017
$ / shares
shares
| |
| Restricted stock units | |
| Non-vested balance at beginning of period (in shares) | 1,396,387 |
| Awarded | 781,010 |
| Vested | (500,389) |
| Forfeited | (53,317) |
| Non-vested balance at end of period (in shares) | 1,623,691 |
| Weighted Average Grant Date Fair Value | |
| Non-vested balance at beginning of period (in dollars per share) | $ / shares | $ 7.60 |
| Awarded (in dollars per share) | $ / shares | 11.23 |
| Vested (in dollars per share) | $ / shares | 7.45 |
| Forfeited (in dollars per share) | $ / shares | 8.62 |
| Non-vested balance at end of period (in dollars per share) | $ / shares | $ 9.36 |
| Shares withheld for tax purposes (in shares) | 170,673 |
| Issuance of shares net of shares withheld (in shares) | 329,716 |