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Share-Based Compensation - Narrative (Details) - $ / shares
12 Months Ended
Apr. 23, 2019
Apr. 17, 2019
Dec. 31, 2019
Dec. 31, 2018
May 08, 2015
Class B Common Stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Conversion of stock, shares received (in shares)   1      
Class A Common Stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Conversion of stock, shares received (in shares)   1      
Incentive Units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares authorized (in shares)         120,000
Award vesting percentage at grant (as a percent)     20.00%    
Award vesting percentage on each anniversary (as a percent)     20.00%    
Conversion of stock, shares received (in shares)   1      
Shares granted during period, grant date fair value (in dollars per share)       $ 10.04  
Shares granted during period (in shares)       354,000  
Shares vested during period (in shares)     3,060,000 0  
RSAs          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares granted during period, grant date fair value (in dollars per share) $ 21.25        
Shares granted during period (in shares) 312,189        
Shares vested during period (in shares) 152,742        
Shares forfeited or converted (in shares)     10,991    
Vesting increments 0.3334%        
Restricted stock units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares granted during period, grant date fair value (in dollars per share) $ 21.25        
Shares granted during period (in shares) 598,891        
Shares vested during period (in shares)     183,082    
Shares forfeited (in shares)     0    
Shares withheld to satisfy employee tax withholding obligations (in shares)     59,111    
Performance-Based Restricted Stock Units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares granted during period, grant date fair value (in dollars per share) $ 20.36        
Shares granted during period (in shares) 753,546   753,546    
Performance shares earned (in shares)     451,933    
Performance-Based Restricted Stock Units | Minimum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting percentage at grant (as a percent) 0.00%        
Performance-Based Restricted Stock Units | Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting percentage at grant (as a percent) 200.00%        
Long Term Incentive Plan | Class A Common Stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares authorized (in shares)     5,999,600    
Shares available for future grants (in shares)     4,416,069