Annual report pursuant to Section 13 and 15(d)

Equity-Based Compensation - Restricted Share Activity (Details)

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Equity-Based Compensation - Restricted Share Activity (Details) - Tanger Factory Outlet Centers, Inc. [Member] - $ / shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Restricted Shares and Restricted Share Units [Member]      
Number of shares/units      
Beginning balance 842,080 749,906 879,268
Granted 308,623 407,156 253,431
Vested (469,178) (314,982) (368,043)
Forfeited 0 0 (14,750)
Ending balance 681,525 842,080 749,906
Weighted-average grant date fair value      
Beginning balance (in dollars per share) $ 27.56 $ 32.30 $ 31.09
Granted (in dollars per share) 21.05 21.13 33.07
Vested (in dollars per share) 27.73 31.43 29.87
Forfeited (in dollars per share) 0 0 34.39
Ending balance (in dollars per share) $ 23.92 $ 27.56 $ 32.30
Restricted Share Units [Member]      
Number of shares/units      
Granted 51,217 44,452