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Organization (Details)
ft² in Millions
3 Months Ended
Mar. 31, 2020
ft²
property
Organization [Line Items]  
Area of real estate property | ft² 17.4
Operating and Redevelopment Properties  
Organization [Line Items]  
Number of real estate properties (in properties) 90
Under Construction Retail Development Project  
Organization [Line Items]  
Number of real estate properties (in properties) 1
General Partner Units  
Organization [Line Items]  
Ownership interest of General Partner (as percent) 97.40%
KRG, LP  
Organization [Line Items]  
Ownership interest of Common Partner (as percent) 2.60%