Annual report pursuant to Section 13 and 15(d)

Debt of the Operating Partnership - Narrative (Details)

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Debt of the Operating Partnership - Narrative (Details) - USD ($)
1 Months Ended 12 Months Ended
Sep. 30, 2018
Jan. 31, 2018
Dec. 31, 2017
Oct. 31, 2018
Feb. 28, 2018
Jan. 31, 2018
Aug. 31, 2017
Jul. 31, 2017
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Mar. 31, 2018
Nov. 30, 2017
Tanger Properties Limited Partnership [Member]                          
Debt Instrument [Line Items]                          
Principal balance of debt                 $ 1,582,309,000 $ 1,730,779,000      
Debt retirement make whole premium                 0 0 $ 34,143,000    
Tanger Properties Limited Partnership [Member] | Mortgages [Member]                          
Debt Instrument [Line Items]                          
Collateral for mortgages payable                 174,200,000        
Tanger Properties Limited Partnership [Member] | Mortgages [Member] | Southaven [Member]                          
Debt Instrument [Line Items]                          
Term of debt extension         2 years                
Principal balance of debt   $ 60,000,000.0     $ 51,400,000 $ 60,000,000.0     $ 51,400,000 51,400,000      
Tanger Properties Limited Partnership [Member] | Mortgages [Member] | Southaven [Member] | London Interbank Offered Rate (LIBOR) [Member]                          
Debt Instrument [Line Items]                          
Basis spread on variable rate   1.75%     1.80%       1.80%        
Tanger Properties Limited Partnership [Member] | Mortgages [Member] | Foxwoods [Member]                          
Debt Instrument [Line Items]                          
Principal balance of debt                         $ 70,300,000
Tanger Properties Limited Partnership [Member] | Line of Credit [Member]                          
Debt Instrument [Line Items]                          
Term of debt extension           1 year              
Liquidity Line, Maximum Borrowings                 $ 20,000,000.0        
Syndicated Line, Maximum Borrowings                 580,000,000.0        
Line of Credit Facility, Syndicated Line, Potential Maximum Borrowings if Accordion Feature is Utilized   $ 1,200,000,000 $ 1,000,000,000.0     $ 1,200,000,000     1,200,000,000   1,000,000,000.0    
Letters of Credit Outstanding, Amount                 $ 170,000        
Percentage of funds from operations allowed on a cumulative basis required for debt covenants                 95.00%        
Principal balance of debt                 $ 0 145,100,000      
Tanger Properties Limited Partnership [Member] | Line of Credit [Member] | London Interbank Offered Rate (LIBOR) [Member]                          
Debt Instrument [Line Items]                          
Basis spread on variable rate     0.90%     0.875%     0.875%        
Tanger Properties Limited Partnership [Member] | Unsecured Term Loan [Member]                          
Debt Instrument [Line Items]                          
Principal balance of debt $ 325,000,000.0     $ 350,000,000.0         $ 350,000,000 350,000,000      
Proceeds from debt       $ 25,000,000.0                  
Tanger Properties Limited Partnership [Member] | Unsecured Term Loan [Member] | London Interbank Offered Rate (LIBOR) [Member]                          
Debt Instrument [Line Items]                          
Basis spread on variable rate 0.95%     0.90%         0.90%        
Tanger Properties Limited Partnership [Member] | Senior Notes [Member] | 3.875% 2027 Senior Notes [Member]                          
Debt Instrument [Line Items]                          
Principal balance of debt               $ 300,000,000.0 $ 300,000,000 $ 300,000,000      
Stated Interest Rate(s)               3.875% 3.875%        
Notes price at percentage of the principal amount               99.579%          
Yield to maturity               3.926%          
Proceeds from Issuance of Long-term Debt               $ 295,900,000          
Tanger Properties Limited Partnership [Member] | Senior Notes [Member] | 6.125% 2020 Senior Notes [Member]                          
Debt Instrument [Line Items]                          
Principal balance of debt             $ 300,000,000.0            
Stated Interest Rate(s)             6.125%            
Debt retirement make whole premium             $ 34,100,000            
Write off of debt discount and deferred debt issuance costs             $ 1,500,000            
Tanger Properties Limited Partnership [Member] | Debt [Member] | Line of Credit [Member]                          
Debt Instrument [Line Items]                          
Maximum borrowing capacity   600,000,000.0 $ 520,000,000.0     $ 600,000,000.0     $ 600,000,000.0   $ 520,000,000.0    
Loan origination costs   $ 2,300,000       $ 2,300,000              
Designated as Hedging Instrument [Member]                          
Debt Instrument [Line Items]                          
Notional Amount                 $ 390,000,000        
Designated as Hedging Instrument [Member] | Southaven [Member]                          
Debt Instrument [Line Items]                          
Derivative, Fixed Interest Rate                       2.47%  
Notional Amount                       $ 40,000,000.0