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Earnings Per Unit of the Operating Partnership (Details) (Tanger Properties Limited Partnership [Member], USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended
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Mar. 31, 2013 | Mar. 31, 2012
Tanger Properties Limited Partnership [Member] |  |
Schedule of Components of Basic and Diluted Earnings Per Unit [Line Items] |  |
Net income attributable to partners of the Operating Partnership | $ 16,228 | $ 8,841
Less allocation of earnings to participating securities | (194) | (158)
Net income available to common shareholders | $ 16,034 | $ 8,683
Basic weighted average common units | 24,472,000 | 24,382,000
Effect of notional units | 201,000 | 274,000
Effect of outstanding options and restricted common units | 27,000 | 16,000
Diluted weighted average common units | 24,700,000 | 24,672,000
Net income, basic (in dollars per share) | $ 0.66 | $ 0.36
Net income, diluted (in dollars per share) | $ 0.65 | $ 0.35
Antidilutive securities excluded from computation of earnings per share | 0 | 43,650

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