Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.1
Debt of the Operating Partnership (Schedule of Debt) (Details) - Tanger Properties Limited Partnership [Member] - USD ($)
1 Months Ended 3 Months Ended
Feb. 29, 2020
Jan. 31, 2020
Mar. 31, 2020
Dec. 31, 2019
Dec. 31, 2011
Debt Instrument [Line Items]          
Principal     $ 2,181,267,000 $ 1,582,309,000  
Book value of debt     $ 2,167,554,000 1,569,773,000  
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     $ 247,471,000 247,308,000  
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     $ 248,218,000 248,127,000  
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     $ 346,354,000 346,215,000  
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     297,050,000 296,953,000  
Mortgages Payable [Member] | Atlantic City Outlets The Walk [Member]          
Debt Instrument [Line Items]          
Principal     30,037,000 30,909,000  
Book value of debt     31,559,000 32,531,000  
Effective interest rates         5.05%
Mortgages Payable [Member] | Southaven [Member]          
Debt Instrument [Line Items]          
Principal     51,400,000 51,400,000  
Book value of debt     51,297,000 51,272,000  
Unsecured Term Loan [Member]          
Debt Instrument [Line Items]          
Principal $ 350,000,000.0   350,000,000 350,000,000  
Book value of debt     347,531,000 347,367,000  
Line of Credit [Member]          
Debt Instrument [Line Items]          
Principal     599,830,000 0  
Book value of debt     $ 598,074,000 $ 0  
London Interbank Offered Rate (LIBOR) [Member] | Mortgages Payable [Member] | Southaven [Member]          
Debt Instrument [Line Items]          
Basis spread on variable rate     1.80%    
London Interbank Offered Rate (LIBOR) [Member] | Unsecured Term Loan [Member]          
Debt Instrument [Line Items]          
Basis spread on variable rate 1.00% 0.90% 1.00%    
London Interbank Offered Rate (LIBOR) [Member] | Line of Credit [Member]          
Debt Instrument [Line Items]          
Basis spread on variable rate 1.00% 0.875% 1.00%    
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%