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Stock-Based Compensation - Narrative (Details) - USD ($)
3 Months Ended 6 Months Ended
Feb. 17, 2021
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Stock-based Compensation arrangements          
Stock based compensation expense   $ 4,300,000 $ 8,300,000 $ 16,000,000.0 $ 24,600,000
Restricted Stock Units          
Stock-based Compensation arrangements          
Granted (in shares)       244,433  
Granted (in dollars per share)       $ 14.08  
Restricted Stock Units | Director          
Stock-based Compensation arrangements          
Granted (in shares)       105,335  
Granted (in dollars per share)       $ 18.54  
Performance Share Awards | Minimum          
Stock-based Compensation arrangements          
Annual forfeiture rate assumption (as a percent)       0.00%  
Performance Share Awards | Maximum          
Stock-based Compensation arrangements          
Annual forfeiture rate assumption (as a percent)       4.00%  
Performance Share Awards Based on Internal Performance Metrics          
Stock-based Compensation arrangements          
Right to receive additional shares, maximum       100.00%  
Employee Performance Share Awards          
Stock-based Compensation arrangements          
Granted (in shares)       696,280  
Granted (in dollars per share)       $ 18.58  
Minimum operating cash flow for the year preceding the performance period       $ 100,000,000  
Number of years over which performance criteria is to be met       3 years  
Employee Performance Share Awards | Tranche three          
Stock-based Compensation arrangements          
Award vesting rights (as a percent)       100.00%  
Hybrid Performance Share Awards          
Stock-based Compensation arrangements          
Granted (in shares)       423,171  
Granted (in dollars per share)       $ 18.58  
Minimum operating cash flow for the year preceding the performance period       $ 100,000,000  
Hybrid Performance Share Awards | Tranche one          
Stock-based Compensation arrangements          
Award vesting rights (as a percent)       25.00%  
Hybrid Performance Share Awards | Tranche two          
Stock-based Compensation arrangements          
Award vesting rights (as a percent)       25.00%  
Hybrid Performance Share Awards | Tranche three          
Stock-based Compensation arrangements          
Award vesting rights (as a percent)       50.00%  
Performance Shares Based on Market Conditions          
Stock-based Compensation arrangements          
Right to receive shares       100.00%  
Right to receive an additional award in cash       100.00%  
TSR Performance Share Awards          
Stock-based Compensation arrangements          
Granted (in shares)       723,224  
Granted (in dollars per share) $ 16.07        
Performance period       3 years  
TSR Performance Share Awards | Minimum          
Stock-based Compensation arrangements          
Granted (in dollars per share)       $ 1.45  
TSR Performance Share Awards | Maximum          
Stock-based Compensation arrangements          
Granted (in dollars per share)       $ 6.94