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Equity-Based Compensation - Summary of Stock Option Activity (Details) - 2017 Plan
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
$ / shares
shares
Number of Stock Options  
Outstanding (in shares) | shares 7,352
Granted (in shares) | shares 1,217
Forfeited (in shares) | shares (66)
Expired (in shares) | shares (161)
Outstanding (in shares) | shares 8,342
Fully vested and expected to vest (in shares) | shares 8,342
Exercisable (in shares) | shares 5,561
Weighted Average Exercise Price per Stock Option  
Outstanding (in dollars per share) | $ / shares $ 14.16
Granted (in dollars per share) | $ / shares 10.66
Forfeited (in dollars per share) | $ / shares 17.00
Expired (in dollars per share) | $ / shares 17.00
Outstanding (in dollars per share) | $ / shares 13.57
Fully vested and expected to vest (in dollars per share) | $ / shares 16.06
Exercisable (in dollars per share) | $ / shares $ 13.57
Weighted Average Remaining Contractual Life  
Outstanding 8 years 29 days
Fully vested and expected to vest 8 years 29 days
Exercisable 7 years 6 months 29 days
Aggregate Intrinsic Value  
Outstanding | $ $ 21,430
Exercisable | $ $ 4,092