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Summary of Significant Accounting Policies - Narrative (Details) (USD $) | 1 Months Ended | 12 Months Ended
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Aug. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Equity method investments |  | $ 208,000,000us-gaap_EquityMethodInvestments | $ 140,200,000us-gaap_EquityMethodInvestments |
Number of properties held for sale |  | 4skt_Numberofpropertiesheldforsale |  |
Management, leasing and other services |  | 3,591,000skt_Managementleasingandotherservicesrevenue | 3,080,000skt_Managementleasingandotherservicesrevenue | 2,007,000skt_Managementleasingandotherservicesrevenue
Tanger Properties Limited Partnership [Member] |  |  |  |
Stock split, conversion ratio | 4us-gaap_StockholdersEquityNoteStockSplitConversionRatio1 / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |  |  |
Exchange ratio of partnership units for common shares | 1skt_ExchangeRatioofPartnershipUnitsforCommonShares / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |  |  |
Partnership unit exchange ratio | 4skt_PartnershipUnitExchangeRatio / dei_LegalEntityAxis = us-gaap_SubsidiariesMember |  |  |
Management, leasing and other services |  | $ 3,591,000skt_Managementleasingandotherservicesrevenue / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | $ 3,080,000skt_Managementleasingandotherservicesrevenue / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | $ 2,007,000skt_Managementleasingandotherservicesrevenue / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Potential Sale in first quarter of 2015 [Member] |  |  |  |
Number of properties held for sale |  | 3skt_Numberofpropertiesheldforsale / skt_PurchaseoptiondateAxis = skt_Date1Member |  |
Potential Sale in first quarter of fiscal 2016 [Member] |  |  |  |
Number of properties held for sale |  | 1skt_Numberofpropertiesheldforsale / skt_PurchaseoptiondateAxis = skt_Date2Member |  |

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- Definition This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35755396&loc=d3e33749-111570 + Details
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- Definition Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Stock Split -URI http://asc.fasb.org/extlink&oid=6525746 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB TOPIC 4.C) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187143-122770 + Details
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