Quarterly report pursuant to Section 13 or 15(d)

Debt of the Operating Partnership (Schedule of Debt) (Details)

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Debt of the Operating Partnership (Schedule of Debt) (Details) - Tanger Properties Limited Partnership [Member] - USD ($)
1 Months Ended 9 Months Ended
Jan. 31, 2018
Dec. 31, 2017
Feb. 28, 2018
Jan. 31, 2018
Sep. 30, 2018
Jul. 31, 2017
Dec. 31, 2011
Debt Instrument [Line Items]              
Principal   $ 1,780,562,000     $ 1,764,591,000    
Book value of debt   1,763,651,000     $ 1,747,660,000    
Senior Notes [Member] | 3.875% 2023 Senior Notes [Member]              
Debt Instrument [Line Items]              
Stated Interest Rate(s)         3.875%    
Principal   250,000,000     $ 250,000,000    
Book value of debt   246,036,000     $ 246,505,000    
Senior Notes [Member] | 3.75% 2024 Senior Notes [Member]              
Debt Instrument [Line Items]              
Stated Interest Rate(s)         3.75%    
Principal   250,000,000     $ 250,000,000    
Book value of debt   247,410,000     $ 247,677,000    
Senior Notes [Member] | 3.125% 2026 Senior Notes [Member]              
Debt Instrument [Line Items]              
Stated Interest Rate(s)         3.125%    
Principal   350,000,000     $ 350,000,000    
Book value of debt   345,128,000     $ 345,533,000    
Senior Notes [Member] | 3.875% 2027 Senior Notes [Member]              
Debt Instrument [Line Items]              
Stated Interest Rate(s)         3.875% 3.875%  
Principal   300,000,000     $ 300,000,000 $ 300,000,000  
Book value of debt   296,182,000     296,469,000    
Mortgages Payable [Member] | Atlantic City Outlets The Walk [Member]              
Debt Instrument [Line Items]              
Principal   37,462,000     35,091,000    
Book value of debt   39,879,000     37,211,000    
Effective interest rates             5.05%
Mortgages Payable [Member] | Southaven [Member]              
Debt Instrument [Line Items]              
Principal $ 60,000,000 60,000,000 $ 51,400,000 $ 60,000,000 51,400,000    
Book value of debt   59,881,000     51,148,000    
Unsecured Term Loan [Member]              
Debt Instrument [Line Items]              
Principal   325,000,000     325,000,000    
Book value of debt   322,975,000     323,416,000    
Line of Credit [Member]              
Debt Instrument [Line Items]              
Principal   208,100,000     203,100,000    
Book value of debt   $ 206,160,000     $ 199,701,000    
London Interbank Offered Rate (LIBOR) [Member] | Mortgages Payable [Member] | Southaven [Member]              
Debt Instrument [Line Items]              
Basis spread on variable rate 1.75%   1.80%   1.80%    
London Interbank Offered Rate (LIBOR) [Member] | Unsecured Term Loan [Member]              
Debt Instrument [Line Items]              
Basis spread on variable rate         0.95%    
London Interbank Offered Rate (LIBOR) [Member] | Line of Credit [Member]              
Debt Instrument [Line Items]              
Basis spread on variable rate   0.90%   0.875% 0.875%    
Minimum [Member] | Mortgages Payable [Member] | Atlantic City Outlets The Walk [Member]              
Debt Instrument [Line Items]              
Stated Interest Rate(s)         5.14%    
Maximum [Member] | Mortgages Payable [Member] | Atlantic City Outlets The Walk [Member]              
Debt Instrument [Line Items]              
Stated Interest Rate(s)         7.65%