Annual report pursuant to Section 13 and 15(d)

Debt of the Operating Partnership (Details)

v3.20.4
Debt of the Operating Partnership (Details) - USD ($)
1 Months Ended 12 Months Ended
Sep. 30, 2018
Jan. 31, 2018
Dec. 31, 2017
Feb. 29, 2020
Jan. 31, 2020
Oct. 31, 2018
Feb. 28, 2018
Jan. 31, 2018
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Jun. 30, 2020
Dec. 31, 2011
Debt Instrument [Line Items]                          
LIBOR floor interest rate                       0.25%  
Tanger Properties Limited Partnership [Member]                          
Debt Instrument [Line Items]                          
Principal                 $ 1,578,743,000 $ 1,582,309,000      
Book value of debt                 1,567,886,000 1,569,773,000      
Debt issuance cost net, recorded in prepaids and other assets                 1,500,000 2,000,000.0      
Debt Issuance Costs, Net                 9,500,000 11,200,000      
Amortization of Debt Issuance Costs                 $ 3,583,000 3,004,000 $ 3,058,000    
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                 $ 247,967,000 247,308,000      
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                 $ 248,493,000 248,127,000      
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                 $ 346,770,000 346,215,000      
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                 297,346,000 296,953,000      
Tanger Properties Limited Partnership [Member] | Mortgages [Member] | Atlantic City Outlets The Walk [Member]                          
Debt Instrument [Line Items]                          
Principal                 27,343,000 30,909,000      
Book value of debt                 28,569,000 32,531,000      
Effective interest rate                         5.05%
Tanger Properties Limited Partnership [Member] | Mortgages [Member] | Southaven [Member]                          
Debt Instrument [Line Items]                          
Principal   $ 60,000,000.0         $ 51,400,000 $ 60,000,000.0 51,400,000 51,400,000      
Book value of debt                 51,371,000 51,272,000      
Tanger Properties Limited Partnership [Member] | Unsecured Term Loan [Member]                          
Debt Instrument [Line Items]                          
Principal $ 325,000,000.0     $ 350,000,000.0   $ 350,000,000.0     350,000,000 350,000,000      
Book value of debt                 347,370,000 347,367,000      
Tanger Properties Limited Partnership [Member] | Line of Credit [Member]                          
Debt Instrument [Line Items]                          
Principal                 0 0      
Book value of debt                 $ 0 $ 0      
Tanger Properties Limited Partnership [Member] | London Interbank Offered Rate (LIBOR) [Member] | Mortgages [Member] | Southaven [Member]                          
Debt Instrument [Line Items]                          
Basis spread on variable rate   1.75%         1.80%   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 0.95%     1.00% 0.90% 0.90%     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     0.90% 1.00% 0.875%     0.875% 1.00%        
Tanger Properties Limited Partnership [Member] | Minimum [Member] | Mortgages [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 [Member] | Atlantic City Outlets The Walk [Member]                          
Debt Instrument [Line Items]                          
Stated Interest Rate(s)                 7.65%