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 ($)
$ / shares in Units, $ in Millions
 1 Months Ended 3 Months Ended
Jan. 31, 2021
Jan. 31, 2020
Mar. 31, 2021
Mar. 31, 2020
Feb. 28, 2021
Dec. 31, 2020
Feb. 28, 2019
Class of Stock [Line Items]              
At Market Stock Aggregate Gross Sales Price of Common Shares     $ 250.0        
Tanger Factory Outlet Centers, Inc. [Member]              
Class of Stock [Line Items]              
Common dividends paid per common share (in dollars per share) $ 0.1775 $ 0.355          
Common dividends per common share (in dollars per share)   0.3575 $ 0.1775 $ 0.7125      
Common shares, par value (in dollars per share)     $ 0.01   $ 0.01 $ 0.01  
Additional amount authorized             $ 44.3
Authorized repurchase amount             $ 169.3
Remaining amount authorized to be repurchase     $ 80.0        
Tanger Properties Limited Partnership [Member]              
Class of Stock [Line Items]              
Common distributions (in dollars per share) $ 0.1775 0.355 $ 0.1775 $ 0.7125      
Cash dividend declared (in dollars per unit)   $ 0.3575