Annual report pursuant to Section 13 and 15(d)

Equity-Based Compensation - Outperformance Plan Rollforward (Details)

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Equity-Based Compensation - Outperformance Plan Rollforward (Details) - Tanger Factory Outlet Centers, Inc. [Member] - Performance Shares [Member] - $ / shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Number of units      
Beginning balance 1,013,383 603,411 759,176
Awarded 531,827 409,972 296,400
Earned 0 0 (184,455)
Forfeited (421,306) 0 (267,710)
Ending balance 1,123,904 1,013,383 603,411
Weighted-average grant date fair value      
Beginning balance (in dollars per share) $ 14.44 $ 15.83 $ 15.36
Awarded (in dollars per share) 12.09 12.42 16.60
Earned (in dollars per share) 0 0 14.71
Forfeited (in dollars per share) 14.36 0 15.84
Ending balance (in dollars per share) $ 13.36 $ 14.44 $ 15.83