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Earnings Per Share of the Company (Details) - Tanger Factory Outlet Centers, Inc. [Member] - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Numerator |  |  |  |  |  |  |  |  |  |  |
Net income attributable to Tanger Factory Outlet Centers, Inc. | $ 19,707 | $ (21,859) | $ 22,969 | $ 22,838 | $ 31,495 | $ (15,219) | $ 29,390 | $ 22,336 | $ 43,655 | $ 68,002 | $ 193,744
Less allocation of earnings to participating securities |  |  |  |  |  |  |  |  | (1,211) | (1,209) | (1,926)
Net income available to common shareholders/unitholders of Tanger Factory Outlet Centers, Inc./the Operating Partnership | $ 19,385 | $ (22,172) | $ 22,656 | $ 22,575 | $ 31,193 | $ (15,525) | $ 29,084 | $ 22,041 | $ 42,444 | $ 66,793 | $ 191,818
Denominator |  |  |  |  |  |  |  |  |  |  |
Basic weighted average common shares (in shares) |  |  |  |  |  |  |  |  | 93,309 | 94,506 | 95,102
Effect of notional units (in shares) |  |  |  |  |  |  |  |  | 0 | 0 | 175
Effect of outstanding options and restricted common shares (in shares) |  |  |  |  |  |  |  |  | 1 | 16 | 68
Diluted weighted average common shares (in shares) |  |  |  |  |  |  |  |  | 93,310 | 94,522 | 95,345
Basic earnings per common share: |  |  |  |  |  |  |  |  |  |  |
Net income, basic (in dollars per share) | $ 0.21 | $ (0.24) | $ 0.24 | $ 0.24 | $ 0.33 | $ (0.17) | $ 0.31 | $ 0.23 | $ 0.45 | $ 0.71 | $ 2.02
Diluted earnings per common share: |  |  |  |  |  |  |  |  |  |  |
Net income, diluted (in dollars per share) | $ 0.21 | $ (0.24) | $ 0.24 | $ 0.24 | $ 0.33 | $ (0.17) | $ 0.31 | $ 0.23 | $ 0.45 | $ 0.71 | $ 2.01
Antidilutive Incremental Common Shares Attributable to Notional Units (in units) |  |  |  |  |  |  |  |  | 1,000 | 603 | 501
Antidilutive securities excluded from computation of earnings per share (in shares) |  |  |  |  |  |  |  |  | 535 | 169 | 141

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