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Employee Equity-Based Compensation - Stock Option Supplemental Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2020
Dec. 31, 2019
Options Outstanding    
Number of options (shares) 10,851,051 10,132,562
Weighted average remaining contractual term (in years) 5 years 11 months 26 days  
Weighted average exercise price (dollars per share) $ 11.90 $ 12.28
Weighted average fair value (dollars per share) $ 7.53  
Aggregate intrinsic value (in thousands) $ 22,821  
Options Exercisable    
Number of options (shares) 656,318  
Weighted average remaining contractual term (in years) 4 years 1 month 6 days  
Weighted average exercise price (dollars per share) $ 9.78  
Weighted average fair value (dollars per share) $ 6.38  
Aggregate intrinsic value (in thousands) $ 21,281