Equity Compensation (Restricted Stock Units) (Details) - USD ($) $ / shares in Units, $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Weighted Average Grant Date Fair Value | ||
| Aggregate intrinsic value of unvested restricted stock | $ 14.2 | |
| Common stock price (in dollars per share) | $ 10.20 | |
| Restricted stock units | ||
| Restricted stock units | ||
| Non-vested balance at beginning of period (in shares) | 425,000 | |
| Awarded | 1,147,946 | 433,000 |
| Vested | (35,340) | |
| Forfeited | (141,219) | (8,000) |
| Non-vested balance at end of period (in shares) | 1,396,387 | 425,000 |
| Weighted Average Grant Date Fair Value | ||
| Non-vested balance at beginning of period (in dollars per share) | $ 8.18 | |
| Awarded (in dollars per share) | 7.40 | 8.18 |
| Vested (in dollars per share) | 7.85 | |
| Forfeited (in dollars per share) | 7.66 | 8.18 |
| Non-vested balance at end of period (in dollars per share) | $ 7.60 | $ 8.18 |