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Equity-Based Compensation (Schedule of Number of Awards and Weighted Average Grant Date Fair Value) (Details) - $ / shares
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2021
Feb. 28, 2017
Mar. 31, 2021
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2019
Performance stock units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of awards (in shares)       183,908 135,540  
Weighted average grant date fair value (in USD per share)       $ 40.49 $ 33.60  
Restricted stock units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of awards (in shares)       144,172 95,674  
Weighted average grant date fair value (in USD per share)       $ 39.43 $ 36.81  
Deferred stock units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of awards (in shares)       7,509 10,255  
Weighted average grant date fair value (in USD per share)       $ 37.95 $ 35.96  
Common shares            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of awards (in shares)       7,509 2,113  
Weighted average grant date fair value (in USD per share)       $ 37.95 $ 35.50  
Scenario, Forecast | Performance stock units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Shares to be issued on conversion (in shares) 38,488         145,420
2015 Incentive Plan | Performance stock units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Shares to be issued on conversion as percentage of total award   95.50%        
2015 Incentive Plan | Scenario, Forecast | Performance stock units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Shares to be issued on conversion (in shares)     126,337