Annual report pursuant to Section 13 and 15(d)

Earnings Per Unit of the Operating Partnership (Details)

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Earnings Per Unit of the Operating Partnership (Details) - Tanger Properties Limited Partnership [Member] - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Numerator      
Net income attributable to Tanger Factory Outlet Centers, Inc. $ 92,533 $ 45,984 $ 71,611
Less allocation of earnings to participating securities (1,336) (1,211) (1,209)
Net income available to common shareholders/unitholders of Tanger Factory Outlet Centers, Inc./the Operating Partnership $ 91,197 $ 44,773 $ 70,402
Denominator      
Basic weighted average common shares (in shares) 97,766,000 98,302,000 99,533,000
Effect of outstanding options and restricted common shares (in shares) 0 1,000 16,000
Diluted weighted average common shares (in shares) 97,766,000 98,303,000 99,549,000
Basic earnings per common unit:      
Net income, basic (in dollars per share) $ 0.93 $ 0.45 $ 0.71
Diluted earnings per common unit:      
Net income, diluted (in dollars per share) $ 0.93 $ 0.45 $ 0.71
Antidilutive Incremental Common Shares Attributable to Notional Units (in units) 1,100,000 1,000,000.0 603,000
Antidilutive securities excluded from computation of earnings per share (in shares) 523,000 535,000 169,000