Quarterly report pursuant to Section 13 or 15(d)

Debt of the Operating Partnership (Narrative) (Details)

v3.20.1
Debt of the Operating Partnership (Narrative) (Details) - USD ($)
1 Months Ended 3 Months Ended
Mar. 31, 2020
Feb. 29, 2020
Jan. 31, 2020
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Minimum [Member]            
Debt Instrument [Line Items]            
Percent of guaranty of completion and principal guaranty 5.00%     5.00%    
Maximum [Member]            
Debt Instrument [Line Items]            
Percent of guaranty of completion and principal guaranty 100.00%     100.00%    
Tanger Properties Limited Partnership [Member]            
Debt Instrument [Line Items]            
Principal $ 2,181,267,000     $ 2,181,267,000   $ 1,582,309,000
Proceeds from revolving credit facility       634,030,000 $ 135,200,000  
Tanger Properties Limited Partnership [Member] | Mortgages [Member]            
Debt Instrument [Line Items]            
Net book value of collateral for mortgages payable 171,700,000     171,700,000    
Tanger Properties Limited Partnership [Member] | Line of Credit [Member]            
Debt Instrument [Line Items]            
Line of Credit Facility, Liquidity Line, Maximum Borrowings, Included in Total Line of Credit Maximum Borrowings 20,000,000.0     20,000,000.0    
Line of Credit Facility, Syndicated Line, Maximum Borrowings, Included in Total Line of Credit Maximum Borrowings 580,000,000.0     580,000,000.0    
Line of Credit Facility, Syndicated Line, Potential Maximum Borrowings if Accordion Feature is Utilized 1,200,000,000     1,200,000,000    
Letters of Credit 170,000     $ 170,000    
Percentage of funds from operations allowed on a cumulative basis to pay dividends       95.00%    
Line of Credit Facility, Commitment Fee Percentage   0.20% 0.15%      
Principal 599,830,000     $ 599,830,000   0
Proceeds from revolving credit facility 599,800,000          
Tanger Properties Limited Partnership [Member] | Unsecured Term Loan [Member]            
Debt Instrument [Line Items]            
Principal 350,000,000 $ 350,000,000.0   350,000,000   350,000,000
Tanger Properties Limited Partnership [Member] | Debt [Member] | Line of Credit [Member]            
Debt Instrument [Line Items]            
Line of credit borrowing capacity 600,000,000.0 $ 600,000,000.0   600,000,000.0    
Tanger Factory Outlet Centers, Inc. [Member]            
Debt Instrument [Line Items]            
Proceeds from revolving credit facility       634,030,000 $ 135,200,000  
Tanger Factory Outlet Centers, Inc. [Member] | Debt [Member] | Mortgages [Member]            
Debt Instrument [Line Items]            
Maximum amount of unconsolidated joint venture debt guaranteed by the Company 19,200,000     19,200,000    
Tanger Factory Outlet Centers, Inc. [Member] | Debt [Member] | Line of Credit [Member]            
Debt Instrument [Line Items]            
Maximum amount of unconsolidated joint venture debt guaranteed by the Company 599,830,000     599,830,000   0
Tanger Factory Outlet Centers, Inc. [Member] | Debt [Member] | Unsecured Term Loan [Member]            
Debt Instrument [Line Items]            
Maximum amount of unconsolidated joint venture debt guaranteed by the Company $ 350,000,000     $ 350,000,000   $ 350,000,000
London Interbank Offered Rate (LIBOR) [Member] | Tanger Properties Limited Partnership [Member] | Line of Credit [Member]            
Debt Instrument [Line Items]            
Basis spread on variable rate   1.00% 0.875% 1.00%    
London Interbank Offered Rate (LIBOR) [Member] | Tanger Properties Limited Partnership [Member] | Unsecured Term Loan [Member]            
Debt Instrument [Line Items]            
Basis spread on variable rate   1.00% 0.90% 1.00%