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Summary of Significant Accounting Policies - Income Taxes (Details) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Schedule of Common Dividends Per Share [Line Items] |  |  |
REIT annual taxable income distribution requirement percentage | 90.00%skt_ReitAnnualTaxableIncomeDistributionRequirementPercentage |  |
Tanger Factory Outlet Centers, Inc [Member] |  |  |
Schedule of Common Dividends Per Share [Line Items] |  |  |
Common dividends per share (in dollars per share) | $ 0.9450us-gaap_CommonStockDividendsPerShareCashPaid / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | $ 0.8850us-gaap_CommonStockDividendsPerShareCashPaid / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | $ 0.8300us-gaap_CommonStockDividendsPerShareCashPaid / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Tanger Factory Outlet Centers, Inc [Member] | Ordinary Income [Member] |  |  |
Schedule of Common Dividends Per Share [Line Items] |  |  |
Common dividends per share (in dollars per share) | $ 0.7645us-gaap_CommonStockDividendsPerShareCashPaid / us-gaap_DividendsAxis = skt_OrdinaryIncomeMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | $ 0.7894us-gaap_CommonStockDividendsPerShareCashPaid / us-gaap_DividendsAxis = skt_OrdinaryIncomeMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | $ 0.8293us-gaap_CommonStockDividendsPerShareCashPaid / us-gaap_DividendsAxis = skt_OrdinaryIncomeMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Tanger Factory Outlet Centers, Inc [Member] | Capital Gain [Member] |  |  |
Schedule of Common Dividends Per Share [Line Items] |  |  |
Common dividends per share (in dollars per share) | $ 0us-gaap_CommonStockDividendsPerShareCashPaid / us-gaap_DividendsAxis = skt_CapitalGainMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | $ 0.0115us-gaap_CommonStockDividendsPerShareCashPaid / us-gaap_DividendsAxis = skt_CapitalGainMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | $ 0us-gaap_CommonStockDividendsPerShareCashPaid / us-gaap_DividendsAxis = skt_CapitalGainMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Tanger Factory Outlet Centers, Inc [Member] | Return Of Captial [Member] |  |  |
Schedule of Common Dividends Per Share [Line Items] |  |  |
Common dividends per share (in dollars per share) | $ 0.1805us-gaap_CommonStockDividendsPerShareCashPaid / us-gaap_DividendsAxis = skt_ReturnOfCaptialMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | $ 0.0841us-gaap_CommonStockDividendsPerShareCashPaid / us-gaap_DividendsAxis = skt_ReturnOfCaptialMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | $ 0.0007us-gaap_CommonStockDividendsPerShareCashPaid / us-gaap_DividendsAxis = skt_ReturnOfCaptialMember / dei_LegalEntityAxis = us-gaap_ParentCompanyMember

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- Definition REIT Annual Taxable Income Distribution Requirement Percentage + References No definition available. + Details
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- Definition Aggregate dividends paid during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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