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Share-Based Compensation - OP Units Grants (Details) - OP Units - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of awards granted (in shares)     0
Trustees      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of awards granted (in shares) 16,325 20,190  
Vesting Period 1 year 1 year  
Grant Date Fair Value (in thousands) $ 575 $ 675  
Associates      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of awards granted (in shares) 255,720    
Grant Date Fair Value (in thousands) $ 7,719    
Minimum | Associates      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting Period 1 year    
Maximum | Associates      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting Period 3 years