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Equity-Based Awards - Additional Information (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock reserved and available for issuance (in shares) 23,187,275      
Vesting period 4 years      
Options granted exercisable period 10 years      
Stock-based compensation expense $ 69,946,000 $ 66,885,000 $ 57,263,000  
Stock options exercised, intrinsic value $ 0 $ 4,000,000 $ 6,000,000  
Weighted-average fair value (in dollars per share) $ 1.71 $ 4.55 $ 4.58  
Unrecognized compensation expense $ 4,000,000      
Unrecognized compensation expense that will be recognized over a weighted-average period 2 years 3 months 18 days      
RSUs        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 4 years      
Unrecognized compensation expense $ 106,000,000      
Unrecognized compensation expense that will be recognized over a weighted-average period 2 years 1 month 6 days      
Total fair value of equity instruments other than options $ 52,000,000 $ 47,000,000 $ 30,000,000  
RSUs | Tranche One        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options vesting percentage 25.00%      
RSUs | Tranche Two        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options vesting percentage 25.00%      
RSUs | Tranche Three        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options vesting percentage 25.00%      
RSUs | Tranche Four        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options vesting percentage 25.00%      
Performance-based RSUs        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 3 years 4 years    
Unrecognized compensation expense $ 14,000,000      
Total fair value of equity instruments other than options $ 14,000,000 $ 11,000,000 $ 9,000,000  
Performance-based RSUs | Minimum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 1 year      
Performance-based RSUs | Maximum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 3 years      
Performance-based RSUs | Tranche One        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options vesting percentage   25.00%    
Performance-based RSUs | Tranche Two        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options vesting percentage   25.00%    
Performance-based RSUs | Tranche Three        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options vesting percentage   25.00%    
Performance-based RSUs | Tranche Four        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options vesting percentage   25.00%    
Performance-based RSUs | Forecast        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unrecognized compensation expense       $ 8,000,000
2019 Omnibus Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock reserved and available for issuance (in shares) 12,500,000      
2019 Omnibus Plan | Time Based Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 3 years      
2019 Director Equity Compensation Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock reserved and available for issuance (in shares) 500,000      
Sovereign MEIP, Sovereign 2012 MEIP, 2014 Omnibus, and 2016 Omnibus Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock reserved and available for issuance (in shares) 10,687,275      
2019, 2016, and 2014 Omnibus Plans | Time Based Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 4 years      
2019, 2016, and 2014 Omnibus Plans | Time Based Options | Tranche One        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options vesting percentage 25.00%      
2019, 2016, and 2014 Omnibus Plans | Time Based Options | Tranche Two        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options vesting percentage 25.00%      
2019, 2016, and 2014 Omnibus Plans | Time Based Options | Tranche Three        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options vesting percentage 25.00%      
2019, 2016, and 2014 Omnibus Plans | Time Based Options | Tranche Four        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options vesting percentage 25.00%