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Stockholders' Equity - Share Activity by Class of Stock (Details) - shares
3 Months Ended
Mar. 31, 2020
Dec. 31, 2019
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Beginning balance (in shares) 77,801,854  
Shares issued (in shares) 0  
Restricted share award net share settlement (in shares) (126,971)  
Delivery of Shares Underlying RSUs (in shares) 24,233  
Ending balance (in shares) 78,590,423  
Shares issued in period (in shares) 60,000  
Class A Common Stock    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Restricted share award net share settlement (in shares) (126,971)  
Delivery of Shares Underlying RSUs (in shares) 24,233  
Ending balance (in shares) 60,647,331  
Class B Common Stock    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Beginning balance (in shares) 7,803,364  
Restricted share award net share settlement (in shares) 0  
Delivery of Shares Underlying RSUs (in shares) 0  
Ending balance (in shares) 5,980,743  
Class C Common Stock    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Beginning balance (in shares) 13,568,665  
Restricted share award net share settlement (in shares) 0  
Delivery of Shares Underlying RSUs (in shares) 0  
Ending balance (in shares) 11,962,349  
Restricted Stock    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Shares issued (in shares) 916,085  
Granted (in shares) 919,455  
Restricted Stock | Class A Common Stock    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Shares issued (in shares) 916,085  
Restricted Stock | Class B Common Stock    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Shares issued (in shares) 0  
Restricted Stock | Class C Common Stock    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Shares issued (in shares) 0  
Restricted Stock Units RSUs    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Restricted stock units outstanding (in shares) 304,570 297,891
Performance Shares    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Granted (in shares) 60,000  
Performance Shares | Pro Forma [Member]    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Granted (in shares) 90,000  
Common Stock    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Holdings Common Unit Exchanges (in shares) 0  
Common Stock | Holdings GP Units    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Holdings Common Unit Exchanges (in shares) (1,626,611)  
Common Stock | Class B Common Stock    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Holdings Common Unit Exchanges (in shares) (45,295)  
Common Stock | Class C Common Stock    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Holdings Common Unit Exchanges (in shares) (1,581,316)  
Common Stock    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Employee/Partner Terminations (in shares) (24,778)  
Common Stock | Class A Common Stock    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Employee/Partner Terminations (in shares) (24,778)  
Common Stock | Class B Common Stock    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Employee/Partner Terminations (in shares) 0  
Common Stock | Class C Common Stock    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Employee/Partner Terminations (in shares) 0  
Follow On Offering    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Shares issued (in shares) 0  
Follow On Offering | Holdings GP Units    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Shares issued (in shares) 1,802,326  
Follow On Offering | Class A Common Stock    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Shares issued (in shares) 1,802,326  
Follow On Offering | Class B Common Stock    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Shares issued (in shares) 1,777,326  
Follow On Offering | Class C Common Stock    
Increase (Decrease) in Stockholders' Equity [Roll Forward]    
Shares issued (in shares) 25,000