Quarterly report pursuant to Section 13 or 15(d)

COVID-19 Pandemic (Narrative) (Details)

v3.20.2
COVID-19 Pandemic (Narrative) (Details) - USD ($)
 1 Months Ended 3 Months Ended 6 Months Ended
Jul. 31, 2020
Jun. 30, 2020
Mar. 31, 2020
Jun. 30, 2020
Jun. 30, 2020
Jun. 30, 2019
Feb. 29, 2020
Dec. 31, 2019
Concentration Risk [Line Items]                
Deferral option percentage     100.00%          
Rents deemed uncollectible       25.00%        
Percentage of rent from bankruptcies and other uncollectable accounts due to financial weakness       9.00%        
Percentage of rent at risk due to tenant financial weakness       2.00%        
Percentage of one-time rent concessions in exchange for landloard-favorable amendments to lease structure       14.00%        
Uncollectible accounts reserve increase (decrease)       $ 9,700,000 $ 9,700,000      
Straight-line rent write off       $ 3,700,000 3,700,000      
Percentage of rent from bankruptcy       9.00%        
Repayments of Long-term Lines of Credit   $ 200,000,000.0            
Reduced cash outflows due to decrease in property operating and general and administrative expenses       $ 11,000,000.0        
Reduced cash outflows due to decrease in general and administrative expenses       1,000,000.0        
Reduced cash outflows due to decrease in property operating expenses       $ 10,000,000.0        
Dividend distributions suspended savings in cash per quarter     $ 35,000,000.0          
Recent Chapter 11 bankruptcy filings [Member]                
Concentration Risk [Line Items]                
Percentage of rent from bankruptcy       93.00%        
Tanger Properties Limited Partnership [Member]                
Concentration Risk [Line Items]                
Repayments of Long-term Lines of Credit         234,200,000 $ 334,100,000    
Principal   1,980,381,000   $ 1,980,381,000 1,980,381,000     $ 1,582,309,000
Tanger Properties Limited Partnership [Member] | Line of Credit [Member]                
Concentration Risk [Line Items]                
Principal   399,830,000   399,830,000 399,830,000     $ 0
Debt [Member] | Tanger Properties Limited Partnership [Member] | Line of Credit [Member]                
Concentration Risk [Line Items]                
Line of credit borrowing capacity   $ 600,000,000.0 $ 600,000,000.0 $ 600,000,000.0 $ 600,000,000.0   $ 600,000,000.0  
Subsequent Event [Member]                
Concentration Risk [Line Items]                
Repayments of Long-term Lines of Credit $ 320,000,000.0