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Organization (Details)
ft² in Millions
9 Months Ended
Sep. 30, 2019
ft²
property
Organization [Line Items]  
Ownership interest of General Partner (as percent) 97.50%
Area of real estate property | ft² 18.1
Operating and Redevelopment Properties  
Organization [Line Items]  
Number of real estate properties (in properties) 96
Under Construction Retail Development Project  
Organization [Line Items]  
Number of real estate properties (in properties) 1
KRG, LP  
Organization [Line Items]  
Ownership interest of Common Partner (as percent) 2.50%