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Stock-Based Compensation - Expense Recorded (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jul. 14, 2017
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Stock-based compensation expense          
Stock-based compensation expense   $ 5,752 $ 17,042 $ 10,290 $ 21,544
Employee stock-based awards and restricted stock          
Stock-based compensation expense          
Period of recognition of unrecognized compensation cost       2 years 7 months 6 days  
Stock options          
Stock-based compensation expense          
Stock-based compensation expense related to accelerated vesting         $ 2,257
Unvested service-based stock options and RSU awards (in shares)   2,467,744   2,467,744  
Performance-based stock options          
Stock-based compensation expense          
Stock-based compensation expense   $ 15,898 $ 15,898    
Restricted Stock          
Stock-based compensation expense          
Unrecognized compensation cost   46,658   $ 46,658  
RowdMap | Restricted Stock          
Stock-based compensation expense          
Fair value of equity interests issued $ 33,232        
RowdMap | Restricted stock, time-based          
Stock-based compensation expense          
Vesting period 3 years        
RowdMap | Restricted stock, performance-based          
Stock-based compensation expense          
Vesting period 1 year        
Stock-based compensation expense   $ 2,769   $ 2,769