Stock-Based Compensation - Option Activity (Details) - Stock option awards
$ / shares in Units, $ in Thousands |
3 Months Ended |
|
Mar. 31, 2018
USD ($)
$ / shares
shares
|
|---|
| Options |
|
| Outstanding, beginning of period (in shares) | shares |
4,290,001
|
| Granted (in shares) | shares |
37,000
|
| Exercised (in shares) | shares |
(10,000)
|
| Forfeited (in shares) | shares |
(47,668)
|
| Outstanding, end of period (in shares) | shares |
4,269,333
|
| Exercisable (in shares) | shares |
1,211,612
|
| Unvested (in shares) | shares |
3,057,721
|
| Weighted Average Exercise Price |
|
| Outstanding, beginning of period (In dollars per share) | $ / shares |
$ 16.15
|
| Granted (in dollars per share) | $ / shares |
20.00
|
| Exercised (in dollars per share) | $ / shares |
16.43
|
| Forfeited (in dollars per share) | $ / shares |
14.95
|
| Outstanding, end of period (In dollars per share) | $ / shares |
16.20
|
| Exercisable (in dollars per share) | $ / shares |
15.83
|
| Unvested (in dollars per share) | $ / shares |
$ 16.28
|
| Outstanding, weighted average remaining term |
8 years 9 months 11 days
|
| Exercisable, weighted average remaining term |
8 years 8 months 9 days
|
| Unvested, weighted average remaining term |
8 years 9 months 22 days
|
| Outstanding, aggregate intrinsic value | $ |
$ 9,417
|
| Exercisable, aggregate intrinsic value | $ |
2,911
|
| Unvested, aggregate intrinsic value | $ |
$ 6,506
|