Annual report pursuant to Section 13 and 15(d)

Investments in Unconsolidated Real Estate Joint Ventures - Narrative (Details)

v3.10.0.1
Investments in Unconsolidated Real Estate Joint Ventures - Narrative (Details)
ft² in Thousands, $ in Millions
1 Months Ended 5 Months Ended
Nov. 30, 2018
USD ($)
Jun. 30, 2017
USD ($)
ft²
Dec. 31, 2018
USD ($)
ft²
Jun. 30, 2018
USD ($)
Jul. 31, 2017
USD ($)
Extension
Nov. 30, 2016
USD ($)
Extension
May 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
ft²
Jun. 30, 2016
ft²
Mar. 31, 2016
ft²
Jul. 31, 2014
ft²
Nov. 30, 2013
ft²
Oct. 31, 2012
ft²
Schedule of Equity Method Investments [Line Items]                          
Difference in basis | $     $ 4.1         $ 4.2          
Charlotte [Member]                          
Schedule of Equity Method Investments [Line Items]                          
Square Feet     398         398     398    
Ownership %     50.00%         50.00%          
Columbus [Member]                          
Schedule of Equity Method Investments [Line Items]                          
Square Feet     355         355 355        
Ownership %     50.00%         50.00%          
Galveston/Houston [Member]                          
Schedule of Equity Method Investments [Line Items]                          
Square Feet     353         353         353
Ownership %     50.00%         50.00%          
National Harbor [Member]                          
Schedule of Equity Method Investments [Line Items]                          
Square Feet     341         341       341  
Ownership %     50.00%         50.00%          
RioCan Canada [Member]                          
Schedule of Equity Method Investments [Line Items]                          
Square Feet     924         923          
Ownership %     50.00%         50.00%          
Ottawa [Member]                          
Schedule of Equity Method Investments [Line Items]                          
Square Feet                   316      
Square feet of anchor tenant                   28      
Estimated square feet of expansion   39                      
Cookstown [Member]                          
Schedule of Equity Method Investments [Line Items]                          
Square Feet     308                    
Les Factoreries St. Sauveur Property [Member]                          
Schedule of Equity Method Investments [Line Items]                          
Square Feet     116                    
Bromont Outlet Mall Property [Member]                          
Schedule of Equity Method Investments [Line Items]                          
Square Feet     161                    
Unconsolidated Properties [Member] | Mortgages [Member] | Charlotte [Member]                          
Schedule of Equity Method Investments [Line Items]                          
Principal | $       $ 100.0     $ 90.0            
Stated Interest Rate(s)       4.30%                  
Basis spread on variable rate             1.45%            
Proceeds from joint venture debt | $       $ 9.3                  
Unconsolidated Properties [Member] | Mortgages [Member] | Columbus [Member]                          
Schedule of Equity Method Investments [Line Items]                          
Principal | $           $ 85.0              
Basis spread on variable rate           1.65%              
Number of mortgage extensions | Extension           2              
Term of debt extension           1 year              
Proceeds from joint venture debt | $           $ 84.2              
Unconsolidated Properties [Member] | Mortgages [Member] | Galveston/Houston [Member]                          
Schedule of Equity Method Investments [Line Items]                          
Principal | $   $ 65.0                      
Basis spread on variable rate   1.50%     1.65%                
Number of mortgage extensions | Extension         2                
Term of debt extension         1 year                
Proceeds from joint venture debt | $         $ 14.5                
Borrowing capacity | $   $ 70.0     $ 80.0                
Unconsolidated Properties [Member] | National Harbor [Member] | Mortgages [Member]                          
Schedule of Equity Method Investments [Line Items]                          
Principal | $ $ 87.0   $ 95.0                    
Stated Interest Rate(s)     4.60%                    
Basis spread on variable rate 1.65%                        
Proceeds from joint venture debt | $     $ 7.4