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Share-Based Compensation - Narrative (Details)
$ / shares in Units, $ in Millions
3 Months Ended 9 Months Ended
Jun. 21, 2022
USD ($)
trustee
$ / shares
shares
Jan. 26, 2022
$ / shares
shares
Jun. 23, 2021
USD ($)
trustee
$ / shares
shares
Jan. 25, 2021
$ / shares
shares
Sep. 30, 2022
USD ($)
shares
Sep. 30, 2021
USD ($)
shares
Sep. 30, 2022
USD ($)
tranche
$ / shares
shares
Sep. 30, 2021
USD ($)
shares
Dec. 31, 2021
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Vesting period 1 year                
Common stock issued (in shares)         110,651,571   110,651,571   115,205,818
Compensation expense, accelerated vesting due to a staffing reduction | $         $ 0.0 $ 0.1 $ 0.4 $ 3.5  
Common shares available for issuance (in shares)         1,126,571   1,126,571    
General and Administrative Expense                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Compensation expense | $         $ 2.9 $ 3.0 $ 9.1 $ 12.6  
RSUs                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Vesting period             3 years    
Number of tranches | tranche             2    
Share-based compensation arrangement (in shares)             382,993 523,662  
Common stock issued (in shares)         382,993 523,662 382,993 523,662  
Granted shares value (in dollars per share) | $ / shares       $ 37.87          
RSUs | Vesting in three years                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Vesting percent             50.00%    
RSUs | Vesting in four years                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Vesting period             1 year    
Vesting percent             50.00%    
RSUs at target                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of equity awards granted (in shares)   187,951   248,646          
RSUs at maximum                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of equity awards granted (in shares)   468,468   619,750          
LTIP Units                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Conversion basis         1   1    
Restricted Shares                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of independent trustees | trustee 6   6            
Number of equity awards granted (in shares) 18,020 92,573 18,505 122,466          
Granted shares value (in dollars per share) | $ / shares       $ 28.25          
Restricted Shares and Time-Based LTIP Units                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Share based compensation amount | $ $ 0.1   $ 0.1            
Exercise price (in dollars per share) | $ / shares $ 27.75   $ 27.02            
Granted shares value (in dollars per share) | $ / shares   $ 25.50              
Estimated future compensation expense for unvested shares | $         $ 5.9   $ 5.9    
Weighted average period over which compensation expense will be recorded             2 years 4 months 24 days    
Restricted Shares and Time-Based LTIP Units | Independent Trustee                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of equity awards granted (in shares) 3,604   3,701            
Time-based LTIP Units                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of equity awards granted (in shares) 3,604 29,071 3,701            
Market-Based LTIP Units, Target                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of equity awards granted (in shares)   59,024              
Market-Based LTIP Units At Maximum                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of equity awards granted (in shares)   147,117              
RSUs and Market-Based LTIP Units                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Granted shares value (in dollars per share) | $ / shares             $ 35.11    
Estimated future compensation expense for unvested shares | $         $ 12.8   $ 12.8    
Weighted average period over which compensation expense will be recorded             2 years 3 months 18 days