Annual report pursuant to Section 13 and 15(d)

Acquisition of Rental Property - Narrative (Details)

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Acquisition of Rental Property - Narrative (Details) - USD ($)
1 Months Ended 6 Months Ended 12 Months Ended
Jul. 31, 2016
Nov. 30, 2017
Aug. 31, 2016
Jun. 30, 2016
Dec. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
May 31, 2016
Acquistion of Rental Property [Line Items]                  
Fair Value Inputs, Long-term Revenue Growth Rate             3.00%    
Foxwoods [Member]                  
Acquistion of Rental Property [Line Items]                  
Economic interest percentage in joint venture   100.00%              
Payments to Acquire Additional Interest in Subsidiaries   $ 0              
Savannah [Member]                  
Acquistion of Rental Property [Line Items]                  
Cash     $ 15,000,000            
Mortgage loan     96,900,000            
Ownership % 50.00%                
Economic interest percentage in joint venture 98.00%                
Contingent Consideration Classified as Equity, Fair Value Disclosure     0            
Acquisition costs     260,000            
Gain on previously held interest in acquired joint ventures     46,300,000            
Rental property and related intangible increase     46,300,000            
Prepaids and other assets     250,000            
Accounts payable and accrued expense     $ 2,100,000            
Westgate [Member]                  
Acquistion of Rental Property [Line Items]                  
Cash       $ 39,000,000          
Mortgage loan       62,000,000          
Ownership %                 58.00%
Contingent Consideration Classified as Equity, Fair Value Disclosure       0          
Acquisition costs       127,000          
Gain on previously held interest in acquired joint ventures       49,300,000          
Rental property and related intangible increase       49,300,000          
Prepaids and other assets       227,000          
Accounts payable and accrued expense       5,000,000          
Payments to Acquire Businesses, Gross       $ 40,900,000          
Percentage of business acquired       40.00%          
Measurement period adjustment, Buildings, Improvements and Fixtures         $ (5,600,000)        
Measurement period adjustment, Land         (150,000)        
Mortgages [Member] | Savannah [Member]                  
Acquistion of Rental Property [Line Items]                  
Basis spread on variable rate     1.65%            
Noncontrolling interests [Member] | Westgate [Member]                  
Acquistion of Rental Property [Line Items]                  
Percentage of business acquired       2.00%          
Payments to Acquire Additional Interest in Subsidiaries       $ 1,900,000          
London Interbank Offered Rate (LIBOR) [Member] | Westgate [Member] | Mortgages [Member]                  
Acquistion of Rental Property [Line Items]                  
Basis spread on variable rate       1.75%          
Minimum [Member]                  
Acquistion of Rental Property [Line Items]                  
Fair Value Inputs, Discount Rate             7.50%    
Fair Value Inputs, Cap Rate             5.75%    
Maximum [Member]                  
Acquistion of Rental Property [Line Items]                  
Fair Value Inputs, Discount Rate             8.25%    
Fair Value Inputs, Cap Rate             7.00%    
Above market lease value [Member] | Westgate [Member]                  
Acquistion of Rental Property [Line Items]                  
Measurement period adjustment, intangibles         1,600,000        
Below market lease value [Member] | Westgate [Member]                  
Acquistion of Rental Property [Line Items]                  
Measurement period adjustment, intangibles         4,800,000        
Lease in place value [Member] | Westgate [Member]                  
Acquistion of Rental Property [Line Items]                  
Measurement period adjustment, intangibles         (628,000)        
Tanger Properties Limited Partnership [Member]                  
Acquistion of Rental Property [Line Items]                  
Cash           $ 0 $ 45,219,000 $ 0  
Acquisition costs           0 487,000 0  
Gain on previously held interest in acquired joint ventures           0 95,516,000 $ 0  
Principal         $ 1,705,998,000 $ 1,780,562,000 $ 1,705,998,000    
Tanger Properties Limited Partnership [Member] | 3.125% Senior Notes $250 million [Member] | Senior Notes [Member]                  
Acquistion of Rental Property [Line Items]                  
Principal     $ 250,000,000