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Organization - (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2020
USD ($)
ft²
property
joint_venture
Dec. 31, 2019
ft²
property
joint_venture
Organization [Line Items]    
Number of joint ventures | joint_venture 1 1
Deferred rental payments $ 1,583  
Proceeds from rents received 1,379  
Deferred rental payments receivable $ 5,791  
Unconsolidated Retail Properties    
Organization [Line Items]    
Number of managed retail properties | property 10 11
Gross Leasable Area (square feet) | ft² 2,470,193 2,580,414
Wholly-Owned Retail Properties    
Organization [Line Items]    
Number of retail properties | property 55 54
Gross Leasable Area (square feet) | ft² 8,392,572 8,311,521