Quarterly report pursuant to Section 13 or 15(d)

Debt of the Operating Partnership (Narrative) (Details)

v3.20.2
Debt of the Operating Partnership (Narrative) (Details)
1 Months Ended 3 Months Ended 9 Months Ended
Jun. 30, 2020
USD ($)
Mar. 31, 2020
USD ($)
Feb. 29, 2020
USD ($)
Jan. 31, 2020
Aug. 31, 2020
USD ($)
Sep. 30, 2020
USD ($)
Sep. 30, 2019
USD ($)
May 31, 2020
Dec. 31, 2019
USD ($)
Debt Instrument [Line Items]                  
Maximum thresholds for total leverage and unsecured leverage 0.65             0.60  
Netting of cash balances in excess $ 30,000,000.0                
Property Management Fee, Percent Fee 3.00%                
LIBOR floor interest rate 0.25%                
Repayments of Long-term Lines of Credit         $ 599,800,000        
Minimum [Member]                  
Debt Instrument [Line Items]                  
Percent of guaranty of completion and principal guaranty           5.00%      
Maximum [Member]                  
Debt Instrument [Line Items]                  
Percent of guaranty of completion and principal guaranty           100.00%      
Tanger Properties Limited Partnership [Member]                  
Debt Instrument [Line Items]                  
Proceeds from revolving credit facility           $ 641,630,000 $ 275,400,000    
Repayments of Long-term Lines of Credit           641,630,000 416,400,000    
Principal           1,579,653,000     $ 1,582,309,000
Tanger Properties Limited Partnership [Member] | Mortgages [Member]                  
Debt Instrument [Line Items]                  
Net book value of collateral for mortgages payable           165,500,000      
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      
Line of Credit Facility, Syndicated Line, Maximum Borrowings, Included in Total Line of Credit Maximum Borrowings           580,000,000.0      
Line of Credit Facility, Syndicated Line, Potential Maximum Borrowings if Accordion Feature is Utilized           $ 1,200,000,000      
Percentage of funds from operations allowed on a cumulative basis to pay dividends           95.00%      
Proceeds from revolving credit facility   $ 599,800,000              
Principal           $ 0     0
Line of Credit Facility, Commitment Fee Percentage     0.20% 0.15%          
Tanger Properties Limited Partnership [Member] | Unsecured Term Loan [Member]                  
Debt Instrument [Line Items]                  
Principal     $ 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           641,630,000 275,400,000    
Repayments of Long-term Lines of Credit           641,630,000 $ 416,400,000    
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           16,400,000      
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           0     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
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%