Stock-Based Compensation - Option Activity (Details) - Stock option awards
$ / shares in Units, $ in Thousands |
6 Months Ended |
|
Jun. 30, 2018
USD ($)
$ / shares
shares
|
|---|
| Options |
|
| Outstanding, beginning of period (in shares) | shares |
4,290,001
|
| Granted (in shares) | shares |
226,500
|
| Exercised (in shares) | shares |
(38,332)
|
| Forfeited (in shares) | shares |
(106,002)
|
| Outstanding, end of period (in shares) | shares |
4,372,167
|
| Exercisable (in shares) | shares |
1,122,775
|
| Unvested (in shares) | shares |
3,160,171
|
| Weighted Average Exercise Price |
|
| Outstanding, beginning of period (in dollars per share) | $ / shares |
$ 16.15
|
| Granted (in dollars per share) | $ / shares |
18.10
|
| Exercised (in dollars per share) | $ / shares |
15.05
|
| Forfeited (in dollars per share) | $ / shares |
15.86
|
| Outstanding, end of period (in dollars per share) | $ / shares |
16.27
|
| Exercisable (in dollars per share) | $ / shares |
15.81
|
| Unvested options (in dollars per share) | $ / shares |
$ 16.36
|
| Outstanding, weighted average remaining term |
8 years 6 months 29 days
|
| Exercisable, weighted average remaining term |
8 years 5 months 12 days
|
| Unvested options, weighted average remaining term |
8 years 7 months 13 days
|
| Outstanding, aggregate intrinsic value | $ |
$ 8,200
|
| Exercisable, aggregate intrinsic value | $ |
2,522
|
| Unvested options, aggregate intrinsic value | $ |
$ 5,677
|