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Stock-Based Compensation - Narrative (Details) - USD ($)
3 Months Ended 9 Months Ended
Feb. 17, 2021
Mar. 31, 2021
Mar. 31, 2020
Sep. 30, 2020
Stock-based Compensation arrangements        
Stock based compensation expense   $ 11,700,000 $ 16,300,000  
Restricted Stock Units        
Stock-based Compensation arrangements        
Granted (in shares)   101,991    
Granted (in dollars per share)   $ 18.59    
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)   $ 7.66    
TSR Performance Share Awards | Maximum        
Stock-based Compensation arrangements        
Granted (in dollars per share)   $ 10.60