Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Equity of the Company (Narrative) (Details)

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Shareholders' Equity of the Company (Narrative) (Details) - USD ($)
 1 Months Ended 3 Months Ended 9 Months Ended
Jan. 31, 2020
Feb. 28, 2019
Jan. 31, 2019
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Mar. 31, 2019
Class of Stock [Line Items]                
Dividends payable               $ 35,200,000
Tanger Factory Outlet Centers, Inc. [Member]                
Class of Stock [Line Items]                
Common dividends paid per common share (in dollars per share) $ 0.355   $ 0.35          
Common dividends per common share (in dollars per share) 0.3575 $ 0.355     $ 0.355 $ 0.7125 $ 1.060  
Additional amount authorized   $ 44,300,000            
Authorized repurchase amount   $ 169,300,000            
Remaining amount authorized to be repurchase       $ 80,000,000.0   $ 80,000,000.0    
Total number of shares purchased       0 650,929 0 1,209,328  
Average price paid per share       $ 0 $ 15.34 $ 0 $ 16.52  
Total price paid exclusive of commissions and related fees (in thousands)       $ 0 $ 9,987,000 $ 0 $ 19,976,000  
Tanger Properties Limited Partnership [Member]                
Class of Stock [Line Items]                
Common distributions (in dollars per share) 0.355   $ 0.35   $ 0.355 $ 0.7125 $ 1.060  
Cash dividend declared (in dollars per unit) $ 0.3575 $ 0.355