Annual report pursuant to Section 13 and 15(d)

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

v3.3.1.900
Investments in Unconsolidated Real Estate Joint Ventures - Narrative (Details)
$ in Millions
 1 Months Ended 3 Months Ended 12 Months Ended
Feb. 28, 2015
USD ($)
Nov. 30, 2014
USD ($)
ft²
May. 31, 2014
USD ($)
Jul. 31, 2013
USD ($)
Jun. 30, 2015
USD ($)
Mar. 31, 2015
USD ($)
ft²
Dec. 31, 2015
USD ($)
ft²
d
Extension
Sep. 30, 2015
USD ($)
Dec. 31, 2014
USD ($)
ft²
Oct. 31, 2014
USD ($)
Schedule of Equity Method Investments [Line Items]                    
Equity method investments             $ 201.1   $ 208.0  
Difference in basis             3.9   4.4  
Joint venture debt outstanding             $ 249.8   $ 268.2  
Charlotte [Member]                    
Schedule of Equity Method Investments [Line Items]                    
Square Feet | ft² [1]             398,000   398,000  
Number of miles from major city | d             8      
Joint venture debt outstanding   $ 90.0         $ 90.0 [1]   $ 90.0 [1]  
Basis spread on variable rate   1.45%                
Term of mortgage extension   1 year                
Proceeds from joint venture debt   $ 89.4                
Ownership % [1]             50.00%   50.00%  
Columbus [Member]                    
Schedule of Equity Method Investments [Line Items]                    
Equity method investments             $ 21.1      
Square Feet | ft²             0      
Joint venture debt outstanding             $ 0.0      
Payments to Acquire Land         $ 8.9          
Ownership %             50.00%      
Company portion of contributed capital to the joint venture             $ 20.6      
Partner's Portion of Contributed Capital to the Joint Venture             $ 20.6      
Galveston/Houston [Member]                    
Schedule of Equity Method Investments [Line Items]                    
Equity method investments                 $ 1.3  
Square Feet | ft²             353,000 [1]   353,000  
Joint venture debt outstanding             $ 65.0 [1]   $ 65.0  
Basis spread on variable rate       1.50%            
Term of mortgage extension       1 year            
Proceeds from joint venture debt       $ 65.0            
Joint venture debt, maximum borrowings       $ 70.0            
Ownership %             50.00% [1]   50.00%  
National Harbor [Member]                    
Schedule of Equity Method Investments [Line Items]                    
Equity method investments             $ 6.1   $ 9.5  
Square Feet | ft²             339,000   339,000  
Joint venture debt outstanding             $ 87.0   $ 83.7  
Basis spread on variable rate   1.65%                
Proceeds from joint venture debt   $ 19.0                
Joint venture debt, maximum borrowings   $ 87.0               $ 62.0
Ownership %             50.00%   50.00%  
RioCan Canda [Member]                    
Schedule of Equity Method Investments [Line Items]                    
Equity method investments             $ 117.2   $ 132.5  
Square Feet | ft²             870,000   870,000  
Joint venture debt outstanding             $ 11.3   $ 15.7  
Ownership %             50.00%   50.00%  
Cookstown [Member]                    
Schedule of Equity Method Investments [Line Items]                    
Square Feet | ft²             309,000      
Estimated square feet of expansion | ft²   149,000                
Les Factoreries St. Sauveur Property [Member]                    
Schedule of Equity Method Investments [Line Items]                    
Square Feet | ft²             116,000      
Bromont Outlet Mall Property [Member]                    
Schedule of Equity Method Investments [Line Items]                    
Square Feet | ft²             161,000      
Ottawa [Member]                    
Schedule of Equity Method Investments [Line Items]                    
Square Feet | ft²             284,000      
Square feet of anchor tenant | ft²             28,000      
Savannah [Member]                    
Schedule of Equity Method Investments [Line Items]                    
Equity method investments [2]             $ 44.4   $ 46.5  
Economic interest percentage in joint venture             98.00%      
Square Feet | ft² [2]             377,000   0  
Joint venture debt outstanding [2]             $ 89.5   $ 25.5  
Basis spread on variable rate     1.65%              
Term of mortgage extension             1 year      
Joint venture debt, maximum borrowings     $ 97.7         $ 100.9    
Ownership % [2]             50.00%   50.00%  
Company portion of contributed capital to the joint venture             $ 45.8      
Estimated square feet of expansion | ft²             42,000      
Partner's Portion of Contributed Capital to the Joint Venture             $ 8.3      
Preferred return percentage prior to grand opening date             8.00%      
Preferred return percentage after grand opening date             10.00%      
Number of mortgage extensions | Extension             2      
Joint Venture Debt, additional borrowings             $ 11.4      
Westgate [Member]                    
Schedule of Equity Method Investments [Line Items]                    
Equity method investments             $ 12.3   $ 14.3  
Square Feet | ft²             411,000   381,000  
Joint venture debt outstanding             $ 62.0   $ 54.0  
Term of mortgage extension         2 years          
Ownership %             58.00%   58.00%  
Estimated square feet of expansion | ft²           28,000        
Estimated total square feet of expansion | ft²           78,000        
Wisconsin Dells [Member]                    
Schedule of Equity Method Investments [Line Items]                    
Equity method investments                 $ 2.4  
Square Feet | ft²                 265,000  
Joint venture debt outstanding                 $ 24.3  
Ownership %                 50.00%  
Net sales price from sale of joint venture $ 15.6                  
Company's share of sales price of sale of joint venture 27.7                  
Company's share of joint venture debt $ 12.1                  
Gain on sale of assets and interests in unconsolidated entities           $ 13.7        
[1] The negative carrying value is due to the distributions of proceeds from mortgage loans and quarterly distributions of excess cash flow exceeding the original contributions from the partners.
[2] Based on capital contribution and distribution provisions in the joint venture agreement, we expect our economic interest in the venture's cash flow to be greater than indicated in the Tanger Ownership column, which states our legal interest in this venture. As of December 31, 2015, based upon the liquidation proceeds we would receive from a hypothetical liquidation of our investment based on depreciated book value, our estimated economic interest in the venture was approximately 98%. Our economic interest may fluctuate based on a number of factors, including mortgage financing, partnership capital contributions and distributions, and proceeds from gains or losses of asset sales.