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Capital - Incentive and Share-based Compensation (Details)
$ / shares in Units, $ in Millions
1 Months Ended 3 Months Ended 5 Months Ended
Mar. 31, 2021
USD ($)
vesting_installment
shares
Jun. 30, 2020
USD ($)
shares
May 31, 2020
USD ($)
vesting_installment
shares
Mar. 31, 2020
USD ($)
vesting_installment
shares
Mar. 31, 2021
USD ($)
$ / shares
shares
Jun. 30, 2020
Mar. 31, 2020
USD ($)
Dec. 31, 2020
USD ($)
shares
May 16, 2019
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Retirement age (in years)         65 years 65 years 60 years    
Expected volatility rate look-back period (in years)         6 years        
Weighted-average per unit or share fair value (in USD per share) | $ / shares         $ 8.38        
Period of service, upon completion of which, grantee's LTIP unit and restricted stock awards will immediately vest (in years)         10 years        
2019 Plan                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of shares authorized under the plan (in shares) 11,000,000.0       11,000,000.0       11,000,000.0
Number of shares that remain available for future issuance (in shares) 7,800,000       7,800,000        
Long-Term Incentive Plan Units and Restricted Stock                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Fair value of share-based awards granted in period | $         $ 18.3        
Weighted-average per unit or share fair value (in USD per share) | $ / shares         $ 8.38        
Dividend rate (as a percent)         2.60%        
Risk free interest rate, minimum (as a percent)         0.12%        
Risk free interest rate, maximum (as a percent)         0.32%        
Expected price volatility, minimum (as a percent)         36.00%        
Expected price volatility, maximum (as a percent)         53.00%        
Time Based Long-Term Incentive Plan Unit and Time Restricted Shares | March 2021 Awards Granted                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Fair value of share-based awards granted in period | $ $ 1.5                
Award vesting period (in years) 5 years                
Time Based Long-Term Incentive Plan Unit                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Threshold of continuous service for retirement eligibility (in years)         10 years        
Time Based Long-Term Incentive Plan Unit | March 2021 Awards                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Shares granted (in shares) 128,419                
Fair value of share-based awards granted in period | $ $ 2.7                
Award vesting period (in years) 4 years                
Number of vesting installments | vesting_installment 3                
Time Restricted Shares | March 2021 Awards                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Shares granted (in shares) 113,333                
Market Based Long-Term Incentive Plan Unit | March 2021 Awards                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Shares granted (in shares) 192,760                
Fair value of share-based awards granted in period | $ $ 1.5                
Award vesting period (in years) 3 years                
Number of vesting installments | vesting_installment 2                
Tranche one | Time Based Long-Term Incentive Plan Unit and Time Restricted Shares | March 2021 Awards Granted                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Award vesting percentage 30.00%                
Tranche two | Time Based Long-Term Incentive Plan Unit and Time Restricted Shares | March 2021 Awards Granted                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Award vesting percentage 30.00%                
Tranche three | Time Based Long-Term Incentive Plan Unit and Time Restricted Shares | March 2021 Awards Granted                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Award vesting percentage 40.00%                
2019 Plan Units | Time Based Long-Term Incentive Plan Unit                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Shares granted (in shares)     63,229 113,971          
Fair value of share-based awards granted in period | $     $ 0.4 $ 2.3          
Award vesting period (in years)       4 years          
Number of vesting installments | vesting_installment       3          
2019 Plan Units | Time Restricted Shares                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Shares granted (in shares)       158,806          
2019 Plan Units | Market Based Long-Term Incentive Plan Unit                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Shares granted (in shares)       502,475          
Fair value of share-based awards granted in period | $       $ 2.3          
Award vesting period (in years)     3 years 3 years          
Number of vesting installments | vesting_installment     2 2          
Awards that meet age and service requirements for vesting                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Noncash share-based compensation expense recognized | $         $ 1.0   $ 1.6    
Unrecognized compensation expense | $ $ 2.1       $ 2.1        
Unrecognized compensation expense, period for recognition (in years)         2 years 8 months 12 days        
Awards that do not meet age and service requirements for vesting                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Noncash share-based compensation expense recognized | $         $ 3.8   $ 4.3    
Unrecognized compensation expense | $ $ 38.8       $ 38.8        
Unrecognized compensation expense, period for recognition (in years)         2 years 8 months 12 days        
Executive Officer | Time Based Long-Term Incentive Plan Unit | March 2021 Awards                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Shares granted (in shares) 364,199                
Fair value of share-based awards granted in period | $ $ 3.4                
Executive Officer | Time Based Long-Term Incentive Plan Unit | March 2021 Awards Granted                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Shares granted (in shares) 46,168                
Executive Officer | Time Based Long-Term Incentive Plan Unit | Awards Granted in 2017, 2018, 2019 and 2020                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Award vesting period (in years)         3 years        
Vesting percentage of award face amount 125.00%       125.00%        
Executive Officer | Market Based Long-Term Incentive Plan Unit | March 2021 Awards                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Shares granted (in shares) 1,007,156                
Fair value of share-based awards granted in period | $ $ 6.9                
Executive Officer | Tranche one | Time Based Long-Term Incentive Plan Unit                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Shares granted (in shares) 39,472     23,049          
Executive Officer | Tranche two | Time Based Long-Term Incentive Plan Unit                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Shares granted (in shares) 196,257     601,331          
Award vesting period (in years)       3 years          
Executive Officer | Tranche three | Time Based Long-Term Incentive Plan Unit                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of vesting installments | vesting_installment 2     2          
Executive Officer | 2019 Plan Units, connected with bonus program | Time Based Long-Term Incentive Plan Unit                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Shares granted (in shares) 235,729     624,380          
Fair value of share-based awards granted in period | $ $ 2.2     $ 4.4          
Vesting percentage of award face amount 120.00%       120.00%        
Executive Officer | 2019 Plan Units | Time Based Long-Term Incentive Plan Unit                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Shares granted (in shares)     82,199 745,155          
Fair value of share-based awards granted in period | $     $ 0.5 $ 5.6          
Executive Officer | 2019 Plan Units | Market Based Long-Term Incentive Plan Unit                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Shares granted (in shares)     116,927 3,358,767          
Fair value of share-based awards granted in period | $     $ 0.5 $ 14.0          
Reduction of grants (in shares)   666,933              
Fair value of reduction of share-based awards granted in period | $   $ 2.8              
Certain Other Employees | Time Based Long-Term Incentive Plan Unit | March 2021 Awards Granted                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Shares granted (in shares) 85,409                
Certain Other Employees | Time Restricted Shares | March 2021 Awards Granted                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Shares granted (in shares) 7,562                
Certain Other Employees | 2019 Plan Units | Market Based Long-Term Incentive Plan Unit                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Reduction of grants (in shares)   99,630              
Fair value of reduction of share-based awards granted in period | $   $ 0.5              
Director | 2019 Plan Units | Time Based Long-Term Incentive Plan Unit                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Shares granted (in shares)     171,153         31,117  
Fair value of share-based awards granted in period | $     $ 1.1         $ 0.2  
Award vesting period (in years)     3 years            
Minimum                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Age of grantee at which LTIP unit and restricted stock awards immediately vest (in years)         60 years        
Minimum | Long-Term Incentive Plan Units and Restricted Stock                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Expected term (in years)         2 years        
Minimum | Time Based Long-Term Incentive Plan Unit                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Award vesting period (in years)         3 years        
Minimum | Market Based Long-Term Incentive Plan Unit                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Award vesting period (in years)         3 years        
Minimum | 2019 Plan Units | Time Based Long-Term Incentive Plan Unit                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Award vesting period (in years)     3 years            
Number of vesting installments | vesting_installment     2            
Maximum                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Age of grantee at which LTIP unit and restricted stock awards immediately vest (in years)         65 years        
Maximum | Long-Term Incentive Plan Units and Restricted Stock                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Expected term (in years)         5 years 3 months 18 days        
Maximum | Time Based Long-Term Incentive Plan Unit                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Award vesting period (in years)         5 years        
Maximum | Market Based Long-Term Incentive Plan Unit                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Award vesting period (in years)         4 years        
Maximum | 2019 Plan Units | Time Based Long-Term Incentive Plan Unit                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Award vesting period (in years)     4 years            
Number of vesting installments | vesting_installment     3            
Median | Time Based Long-Term Incentive Plan Unit                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Award vesting period (in years)         4 years