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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, 2020
USD ($)
$ / shares
shares
Number of Stock Options  
Outstanding (in shares) | shares 8,342
Options granted (in shares) | shares 1,117
Forfeited (in shares) | shares (177)
Expired (in shares) | shares (219)
Outstanding (in shares) | shares 9,063
Fully vested and expected to vest (in shares) | shares 9,063
Exercisable (in shares) | shares 5,991
Weighted Average Exercise Price per Stock Option  
Outstanding (in dollars per share) | $ / shares $ 13.57
Granted (in dollars per share) | $ / shares 14.95
Forfeited (in dollars per share) | $ / shares 17.00
Expired (in dollars per share) | $ / shares 17.00
Outstanding (in dollars per share) | $ / shares 13.59
Fully vested and expected to vest (in dollars per share) | $ / shares 14.93
Exercisable (in dollars per share) | $ / shares $ 13.59
Weighted Average Remaining Contractual Life  
Outstanding 7 years 6 months 10 days
Fully vested and expected to vest 7 years 6 months 10 days
Exercisable 7 years 14 days
Aggregate Intrinsic Value  
Outstanding | $ $ 28,135
Exercisable | $ $ 11,537