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Investments in Unconsolidated Real Estate Joint Ventures - Narrative (Details) (USD $) | 12 Months Ended | 1 Months Ended | 3 Months Ended | 1 Months Ended |  |  |  |
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Dec. 31, 2014 sqft | Aug. 31, 2013 | Nov. 30, 2014 | Mar. 31, 2012 | Jun. 30, 2013 | May 31, 2014 | Jul. 31, 2013 | Dec. 31, 2012 | Feb. 28, 2015 | Dec. 31, 2013 | Mar. 31, 2013 | Apr. 30, 2014 | Oct. 31, 2014
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity method investments | $ 208,000,000us-gaap_EquityMethodInvestments |  |  |  |  |  |  |  |  |  | $ 140,200,000us-gaap_EquityMethodInvestments |  |  |
Difference in basis | 4,400,000us-gaap_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity |  |  |  |  |  |  |  |  |  | 1,600,000us-gaap_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity |  |  |
Area of real estate property | 982,000us-gaap_AreaOfRealEstateProperty |  |  |  |  |  |  |  |  |  |  |  |  |
Joint venture debt outstanding | 268,200,000skt_JointVentureDebtOutstanding |  |  |  |  |  |  |  |  |  | 202,700,000skt_JointVentureDebtOutstanding |  |  |
Net proceeds on sale of real estate | 38,993,000us-gaap_ProceedsFromSaleOfOtherRealEstate |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on sale of real estate | 7,513,000us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal |  |  |  |  |  |  |  |  |  |  |  |  |
Charlotte [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity method investments |  |  |  |  |  |  |  |  |  |  | 11,600,000us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_CharlotteMember |  |  |
Area of real estate property | 398,000us-gaap_AreaOfRealEstateProperty / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_CharlotteMember | [1] |  |  |  |  |  |  |  |  | 0us-gaap_AreaOfRealEstateProperty / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_CharlotteMember |  |  |
Number of miles from major city | 8skt_Numberofmilesfrommajorcity / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_CharlotteMember |  |  |  |  |  |  |  |  |  |  |  |  |
Joint venture debt outstanding | 90,000,000skt_JointVentureDebtOutstanding / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_CharlotteMember | [1] |  |  |  |  |  |  |  |  | 0skt_JointVentureDebtOutstanding / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_CharlotteMember |  |  |
Ownership % | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_CharlotteMember | [1] |  |  |  |  |  |  |  |  | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_CharlotteMember |  |  |
Deer Park [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  | 3.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_DeerParkMember |  |  |  |  |  |  |  |  |  |  |
Additional Ownership Percentage Acquired |  |  | 33.30%skt_AdditionalOwnershipPercentageAcquired / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_DeerParkMember |  |  |  |  |  |  |  |  |  |  |
Ownership % |  |  | 66.70%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_DeerParkMember |  |  |  |  |  |  |  |  |  |  |
Galveston/Houston [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity method investments | 1,300,000us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_GalvestonHoustonMember |  |  |  |  |  |  |  |  |  | 7,400,000us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_GalvestonHoustonMember |  |  |
Area of real estate property | 353,000us-gaap_AreaOfRealEstateProperty / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_GalvestonHoustonMember |  |  |  |  |  |  |  |  |  | 353,000us-gaap_AreaOfRealEstateProperty / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_GalvestonHoustonMember |  |  |
Joint venture debt outstanding | 65,000,000skt_JointVentureDebtOutstanding / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_GalvestonHoustonMember |  |  |  |  |  |  |  |  |  | 65,000,000skt_JointVentureDebtOutstanding / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_GalvestonHoustonMember |  |  |
Ownership % | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_GalvestonHoustonMember |  |  |  |  |  |  |  |  |  | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_GalvestonHoustonMember |  |  |
National Harbor [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity method investments | 9,500,000us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_NationalHarborMember |  |  |  |  |  |  |  |  |  | 16,700,000us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_NationalHarborMember |  |  |
Area of real estate property | 339,000us-gaap_AreaOfRealEstateProperty / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_NationalHarborMember |  |  |  |  |  |  |  |  |  | 336,000us-gaap_AreaOfRealEstateProperty / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_NationalHarborMember |  |  |
Proceeds from joint venture debt |  |  |  | 19,000,000us-gaap_ProceedsFromIssuanceOfDebt / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_NationalHarborMember |  |  |  |  |  |  |  |  |  |
Joint venture debt outstanding | 83,700,000skt_JointVentureDebtOutstanding / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_NationalHarborMember |  |  |  |  |  |  |  |  |  | 52,400,000skt_JointVentureDebtOutstanding / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_NationalHarborMember |  |  |
Ownership % | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_NationalHarborMember |  |  |  |  |  |  |  |  |  | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_NationalHarborMember |  |  |
RioCan Canda [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity method investments | 132,500,000us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_RiocanCandaMember |  |  |  |  |  |  |  |  |  | 85,700,000us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_RiocanCandaMember |  |  |
Area of real estate property | 870,000us-gaap_AreaOfRealEstateProperty / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_RiocanCandaMember |  |  |  |  |  |  |  |  |  | 433,000us-gaap_AreaOfRealEstateProperty / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_RiocanCandaMember |  |  |
Joint venture debt outstanding | 15,700,000skt_JointVentureDebtOutstanding / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_RiocanCandaMember |  |  |  |  |  |  |  |  |  | 17,900,000skt_JointVentureDebtOutstanding / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_RiocanCandaMember |  |  |
Ownership % | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_RiocanCandaMember |  |  |  |  |  |  |  |  |  | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_RiocanCandaMember |  |  |
Abandoned development costs |  |  |  |  | 1,400,000skt_AbandonedDevelopmentCosts / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_RiocanCandaMember |  |  |  |  |  |  |  |  |
Cookstown [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Area of real estate property | 305,000us-gaap_AreaOfRealEstateProperty / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_CookstownMember |  |  |  |  |  |  |  |  |  |  |  |  |
Company portion of contributed capital to the joint venture | 27,100,000skt_CompanyPortionOfContributedCapitalToJointVenture / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_CookstownMember |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated square feet of expansion | 149,000skt_EstimatedSquareFeetofExpansion / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_CookstownMember |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, contingent consideration, potential cash payment |  |  |  |  |  |  |  |  |  |  |  | 13,800,000us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_CookstownMember |  |
Les Factoreries St. Sauveur Property [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Area of real estate property | 116,000us-gaap_AreaOfRealEstateProperty / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_LesFactoreriesStSauveurPropertyMember |  |  |  |  |  |  |  |  |  |  |  |  |
Bromont Outlet Mall Property [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Area of real estate property | 161,000us-gaap_AreaOfRealEstateProperty / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_BromontOutletMallPropertyMember |  |  |  |  |  |  |  |  |  |  |  |  |
Ottawa [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Area of real estate property | 288,000us-gaap_AreaOfRealEstateProperty / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_OttawaMember |  |  |  |  |  |  |  |  |  |  |  |  |
Square feet of anchor tenant | 28,000skt_Squarefeetofanchortenant / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_OttawaMember |  |  |  |  |  |  |  |  |  |  |  |  |
Company portion of contributed capital to the joint venture | 45,300,000skt_CompanyPortionOfContributedCapitalToJointVenture / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_OttawaMember |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to acquire real estate |  |  |  |  |  | 28,700,000us-gaap_PaymentsToAcquireRealEstate / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_OttawaMember |  |  |  |  |  |  |  |
Savannah [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity method investments | 46,500,000us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_SavannahMember | [2] |  |  |  |  |  |  |  |  |  |  |  |
Area of real estate property | 0us-gaap_AreaOfRealEstateProperty / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_SavannahMember | [2] |  |  |  |  |  |  |  |  |  |  |  |
Ownership % | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_SavannahMember | [2] |  |  |  |  |  |  |  |  |  |  |  |
Company portion of contributed capital to the joint venture | 45,200,000skt_CompanyPortionOfContributedCapitalToJointVenture / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_SavannahMember |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated Square Footage of Real Estate Property When Completed | 377,000skt_EstimatedSquareFootageofRealEstatePropertyWhenCompleted / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_SavannahMember |  |  |  |  |  |  |  |  |  |  |  |  |
Partner's Portion of Contributed Capital to the Joint Venture | 7,400,000skt_PartnersPortionofContributedCapitaltotheJointVenture / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_SavannahMember |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred return percentage prior to grand opening date | 8.00%skt_Preferredreturnpercentagepriortograndopeningdate / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_SavannahMember |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred return percentage after grand opening date | 10.00%skt_Preferredreturnpercentageaftergrandopeningdate / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_SavannahMember |  |  |  |  |  |  |  |  |  |  |  |  |
Westgate [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity method investments | 14,300,000us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_WestgateMember |  |  |  |  |  |  |  |  |  | 16,100,000us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_WestgateMember |  |  |
Area of real estate property | 381,000us-gaap_AreaOfRealEstateProperty / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_WestgateMember |  |  |  |  |  |  |  |  |  | 332,000us-gaap_AreaOfRealEstateProperty / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_WestgateMember |  |  |
Term of mortgage extension |  |  |  |  |  |  | 2 years |  |  |  |  |  |  |
Joint venture debt outstanding | 54,000,000skt_JointVentureDebtOutstanding / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_WestgateMember |  |  |  |  |  |  |  |  |  | 43,100,000skt_JointVentureDebtOutstanding / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_WestgateMember |  |  |
Joint venture debt, maximum borrowings |  |  |  |  |  |  | 62,000,000skt_JointVentureDebtMaximumBorrowings / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_WestgateMember |  |  |  |  |  | 48,300,000skt_JointVentureDebtMaximumBorrowings / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_WestgateMember |
Ownership % | 58.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_WestgateMember |  |  |  |  |  |  |  |  |  | 58.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_WestgateMember |  |  |
Estimated square feet of expansion |  |  |  | 50,000skt_EstimatedSquareFeetofExpansion / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_WestgateMember |  |  |  |  |  |  |  |  |  |
Estimated Square Feet of Expansion when completed | 78,000skt_EstimatedSquareFeetofExpansionwhencompleted / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_WestgateMember |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated Square Footage of Real Estate Property When Completed |  |  |  | 409,000skt_EstimatedSquareFootageofRealEstatePropertyWhenCompleted / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_WestgateMember |  |  |  |  |  |  |  |  |  |
Wisconsin Dells [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity method investments | 2,400,000us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_WisconsinDellsMember |  |  |  |  |  |  |  |  |  | 2,500,000us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_WisconsinDellsMember |  |  |
Area of real estate property | 265,000us-gaap_AreaOfRealEstateProperty / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_WisconsinDellsMember |  |  |  |  |  |  |  |  |  | 265,000us-gaap_AreaOfRealEstateProperty / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_WisconsinDellsMember |  |  |
Joint venture debt outstanding |  |  |  |  |  |  |  |  |  |  | 24,300,000skt_JointVentureDebtOutstanding / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_WisconsinDellsMember |  |  |
Ownership % | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_WisconsinDellsMember |  |  |  |  |  |  |  |  |  | 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_WisconsinDellsMember |  |  |
Mortgages [Member] | Charlotte [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  | 1.45%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LongtermDebtTypeAxis = us-gaap_MortgagesMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_CharlotteMember |  |  |  |  |  |  |  |  |  |
Term of mortgage extension |  |  |  | 1 year |  |  |  |  |  |  |  |  |  |
Proceeds from joint venture debt |  |  |  | 89,400,000us-gaap_ProceedsFromIssuanceOfDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_MortgagesMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_CharlotteMember |  |  |  |  |  |  |  |  |  |
Joint venture debt outstanding | 90,000,000skt_JointVentureDebtOutstanding / us-gaap_LongtermDebtTypeAxis = us-gaap_MortgagesMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_CharlotteMember |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgages [Member] | Galveston/Houston [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  |  |  |  |  | 1.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LongtermDebtTypeAxis = us-gaap_MortgagesMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_GalvestonHoustonMember |  |  |  |  |  |
Term of mortgage extension |  |  |  |  |  |  |  | 1 year |  |  |  |  |  |
Proceeds from joint venture debt |  |  |  |  |  |  |  | 65,000,000us-gaap_ProceedsFromIssuanceOfDebt / us-gaap_LongtermDebtTypeAxis = us-gaap_MortgagesMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_GalvestonHoustonMember |  |  |  |  |  |
Joint venture debt, maximum borrowings |  |  |  |  |  |  |  | 70,000,000skt_JointVentureDebtMaximumBorrowings / us-gaap_LongtermDebtTypeAxis = us-gaap_MortgagesMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_GalvestonHoustonMember |  |  |  |  |  |
Mortgages [Member] | National Harbor [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  | 1.65%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LongtermDebtTypeAxis = us-gaap_MortgagesMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_NationalHarborMember |  |  |  |  |  |  |  |  |  |
Joint venture debt outstanding | 83,700,000skt_JointVentureDebtOutstanding / us-gaap_LongtermDebtTypeAxis = us-gaap_MortgagesMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_NationalHarborMember |  |  |  |  |  |  |  |  |  |  |  |  |
Joint venture debt, maximum borrowings |  |  |  | 87,000,000skt_JointVentureDebtMaximumBorrowings / us-gaap_LongtermDebtTypeAxis = us-gaap_MortgagesMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_NationalHarborMember |  |  |  |  |  |  |  |  |  | 62,000,000skt_JointVentureDebtMaximumBorrowings / us-gaap_LongtermDebtTypeAxis = us-gaap_MortgagesMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_NationalHarborMember
Mortgages [Member] | Savannah [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 1.65%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LongtermDebtTypeAxis = us-gaap_MortgagesMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_SavannahMember |  |  |  |  |  |  |  |  |  |  |  |  |
Term of mortgage extension | 1 year |  |  |  |  |  |  |  |  |  |  |  |  |
Joint venture debt outstanding | 25,500,000skt_JointVentureDebtOutstanding / us-gaap_LongtermDebtTypeAxis = us-gaap_MortgagesMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_SavannahMember | [2] |  |  |  |  |  |  |  |  |  |  |  |
Joint venture debt, maximum borrowings | 93,000,000skt_JointVentureDebtMaximumBorrowings / us-gaap_LongtermDebtTypeAxis = us-gaap_MortgagesMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_SavannahMember |  |  |  |  |  |  |  |  |  |  |  |  |
Number of mortgage extensions | 2skt_Numberofmortgageextensions / us-gaap_LongtermDebtTypeAxis = us-gaap_MortgagesMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_SavannahMember |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgages [Member] | Wisconsin Dells [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  |  |  |  |  |  | 2.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_LongtermDebtTypeAxis = us-gaap_MortgagesMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_WisconsinDellsMember |  |  |  |  |
Joint venture debt outstanding | 24,300,000skt_JointVentureDebtOutstanding / us-gaap_LongtermDebtTypeAxis = us-gaap_MortgagesMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_WisconsinDellsMember |  |  |  |  |  |  |  |  |  |  |  |  |
Joint venture debt, maximum borrowings |  |  |  |  |  |  |  |  | 24,300,000skt_JointVentureDebtMaximumBorrowings / us-gaap_LongtermDebtTypeAxis = us-gaap_MortgagesMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_WisconsinDellsMember |  |  |  |  |
Debt instrument, term |  |  |  |  |  |  |  |  | 10 years |  |  |  |  |
Subsequent Event [Member] | Wisconsin Dells [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net proceeds on sale of real estate |  |  |  |  |  |  |  |  |  | 15,600,000us-gaap_ProceedsFromSaleOfOtherRealEstate / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_WisconsinDellsMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |  |  |
Gain on sale of real estate |  |  |  |  |  |  |  |  |  | $ 13,900,000us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = skt_WisconsinDellsMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |  |  |  |
[1] | The negative carrying value is due to the distributions of proceeds from a mortgage loan, as well as quarterly distributions of excess cash flow, exceeding the original contributions from the partners.
[2] | Based on capital contribution and distribution provisions in the joint venture agreement, we expect our economic interest in the venture's cash flow to be greater than the ownership percentage indicated above, which in this case, states our legal interest in this venture. Our economic interest may fluctuate based on a number of factors, including mortgage financing, partnership capital contributions and distributions, and proceeds from gains or losses of asset sales.

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- Definition The gain (loss) resulting from the sale of a disposal group that is not a discontinued operation. It is included in income from continuing operations before income taxes in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2443-110228 + Details
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