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Stock-Based Compensation - Narrative (Details)
1 Months Ended 12 Months Ended
Feb. 29, 2020
USD ($)
performance_criteria
Jan. 31, 2020
USD ($)
shares
Dec. 31, 2019
USD ($)
Award_Type
shares
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Feb. 25, 2020
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based compensation expense     $ 30,800,000 $ 33,100,000 $ 34,000,000.0  
Defined contribution cost recognized     $ 2,400,000      
Deferred Compensation, Share-based Payments            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Common shares held in employee trust earned but not distributed (in shares) | shares     495,774      
Restricted Stock Awards            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based compensation expense     $ 1,300,000 2,800,000 500,000  
Award vesting period     3 years      
Compensation cost not yet recognized     $ 1,100,000      
Period of recognition for unrecognized compensation costs     2 years 6 months      
Fair value of award     $ 4,100,000 200,000 900,000  
Aggregate intrinsic value     $ 1,000,000.0      
Weighted-average remaining contractual term of non-vested shares     2 years 2 months 12 days      
Restricted Stock Awards | Minimum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Expected forfeiture rate     5.00%      
Restricted Stock Awards | Graduated or Graded Vesting | Minimum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting period     3 years      
Restricted Stock Awards | Graduated or Graded Vesting | Maximum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting period     4 years      
Restricted Stock Units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based compensation expense     $ 2,100,000 1,900,000 1,400,000  
Aggregate intrinsic value     10,000,000.0      
Performance Shares            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-based compensation expense     $ 28,800,000 30,600,000 29,100,000  
Award vesting period     3 years      
Compensation cost not yet recognized     $ 27,200,000      
Period of recognition for unrecognized compensation costs     2 years 6 months      
Number of performance award types | Award_Type     3      
Aggregate intrinsic value     $ 58,900,000      
Weighted-average remaining contractual term of non-vested shares     1 year 1 month 6 days      
Number of performance awards where the performance period has ended | Award_Type     2      
Performance Shares | Minimum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Expected forfeiture rate     0.00%      
Performance Shares | Maximum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Expected forfeiture rate     7.00%      
Internal Metrics Performance Share Awards            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of performance award types | Award_Type     2      
Rights to share portion of award, maximum percent     100.00%      
Market Based Performance Share Awards            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of performance award types | Award_Type     1      
Rights to share portion of award, maximum percent     100.00%      
Rights to cash portion of award, maximum percent     100.00%      
Employee Performance Share Awards            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting period     3 years      
Employee Performance Share Awards | Subsequent Event            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of performance criteria | performance_criteria 3          
Number of performance awards issued and certified (in shares) | shares           347,070
Grant date fair value of performance shares issued and certified $ 7,800,000          
Hybrid Performance Shares            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Minimum operating cash flow for performance based award     $ 100,000,000      
Hybrid Performance Shares | Graduated or Graded Vesting            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting period     3 years      
Hybrid Performance Shares | 25% Vesting on First and Second Anniversary            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting percentage     25.00%      
Hybrid Performance Shares | 50% Vesting on Third Anniversary            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting percentage     50.00%      
TSR Performance Share Awards            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Performance period of peer group     3 years      
Cash payments for share-based compensation     $ 5,000,000.0 3,300,000 $ 0  
TSR Performance Share Awards | Subsequent Event            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of performance awards issued and certified (in shares) | shares   409,380        
Grant date fair value of performance shares issued and certified   $ 8,100,000        
Payments for stock-based compensation   $ 6,100,000        
TSR Performance Share Awards | Liability            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Current portion of share-based liability     6,100,000 5,000,000.0    
Noncurrent portion of share-based liability     $ 4,100,000 $ 7,900,000