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) - USD ($)
3 Months Ended
Mar. 31, 2021
Feb. 28, 2021
Dec. 31, 2020
Dec. 31, 2011
Debt Instrument [Line Items]        
LIBOR floor interest rate 0.25%      
Tanger Properties Limited Partnership [Member]        
Debt Instrument [Line Items]        
Principal $ 1,552,820,000   $ 1,578,743,000  
Book value of debt $ 1,542,760,000   1,567,886,000  
Tanger Properties Limited Partnership [Member] | 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 $ 248,136,000   247,967,000  
Tanger Properties Limited Partnership [Member] | 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 $ 248,585,000   248,493,000  
Tanger Properties Limited Partnership [Member] | 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 $ 346,909,000   346,770,000  
Tanger Properties Limited Partnership [Member] | Senior Notes [Member] | 3.875% 2027 Senior Notes [Member]        
Debt Instrument [Line Items]        
Stated Interest Rate(s) 3.875%      
Principal $ 300,000,000   300,000,000  
Book value of debt 297,444,000   297,346,000  
Tanger Properties Limited Partnership [Member] | Mortgages Payable [Member] | Atlantic City Outlets The Walk [Member]        
Debt Instrument [Line Items]        
Principal 26,420,000   27,343,000  
Book value of debt 27,547,000   28,569,000  
Effective interest rates       5.05%
Tanger Properties Limited Partnership [Member] | Mortgages Payable [Member] | Southaven [Member]        
Debt Instrument [Line Items]        
Principal 51,400,000   51,400,000  
Book value of debt $ 51,386,000   51,371,000  
Term of mortgage extension 2 years      
Tanger Properties Limited Partnership [Member] | Unsecured Term Loan [Member]        
Debt Instrument [Line Items]        
Principal $ 325,000,000 $ 350,000,000.0 350,000,000  
Book value of debt 322,753,000   347,370,000  
Tanger Properties Limited Partnership [Member] | Line of Credit [Member]        
Debt Instrument [Line Items]        
Principal 0   0  
Book value of debt $ 0   $ 0  
Term of mortgage extension 1 year      
Tanger Properties Limited Partnership [Member] | London Interbank Offered Rate (LIBOR) [Member] | Mortgages Payable [Member] | Southaven [Member]        
Debt Instrument [Line Items]        
Basis spread on variable rate 1.80%      
Tanger Properties Limited Partnership [Member] | London Interbank Offered Rate (LIBOR) [Member] | Unsecured Term Loan [Member]        
Debt Instrument [Line Items]        
Basis spread on variable rate 1.00%      
Tanger Properties Limited Partnership [Member] | London Interbank Offered Rate (LIBOR) [Member] | Line of Credit [Member]        
Debt Instrument [Line Items]        
Basis spread on variable rate 1.00%      
Tanger Properties Limited Partnership [Member] | Minimum [Member] | Mortgages Payable [Member] | Atlantic City Outlets The Walk [Member]        
Debt Instrument [Line Items]        
Stated Interest Rate(s) 5.14%      
Tanger Properties Limited Partnership [Member] | Maximum [Member] | Mortgages Payable [Member] | Atlantic City Outlets The Walk [Member]        
Debt Instrument [Line Items]        
Stated Interest Rate(s) 7.65%