Quarterly report pursuant to Section 13 or 15(d)

Investments in Unconsolidated Real Estate Joint Ventures (Unconsolidated Real Estate Joint Ventures) (Details)

v2.4.1.9
Investments in Unconsolidated Real Estate Joint Ventures (Unconsolidated Real Estate Joint Ventures) (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Schedule of Equity Method Investments [Line Items]    
Equity Method Investment Reported In Liabilities $ (0.6)skt_EquityMethodInvestmentReportedInLiabilities $ (2.2)skt_EquityMethodInvestmentReportedInLiabilities
Total Joint Venture Debt (in millions) 280.2skt_JointVentureDebtOutstanding 268.2skt_JointVentureDebtOutstanding
Partnership Interest [Member]    
Schedule of Equity Method Investments [Line Items]    
Carrying Value of Investment (in millions) 205.1us-gaap_EquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= us-gaap_PartnershipInterestMember 		208.0us-gaap_EquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= us-gaap_PartnershipInterestMember
Columbus [Member]    
Schedule of Equity Method Investments [Line Items]    
Ownership % 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_ColumbusMember 		 
Square Feet 0us-gaap_AreaOfRealEstateProperty
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_ColumbusMember 		 
Carrying Value of Investment (in millions) 2.0us-gaap_EquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_ColumbusMember 		 
Total Joint Venture Debt (in millions) 0skt_JointVentureDebtOutstanding
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_ColumbusMember 		 
Galveston/Houston [Member]    
Schedule of Equity Method Investments [Line Items]    
Ownership % 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_GalvestonHoustonMember 		50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_GalvestonHoustonMember
Square Feet 353,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_GalvestonHoustonMember 		353,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_GalvestonHoustonMember
Carrying Value of Investment (in millions) 0.6us-gaap_EquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_GalvestonHoustonMember 		1.3us-gaap_EquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_GalvestonHoustonMember
Total Joint Venture Debt (in millions) 65.0skt_JointVentureDebtOutstanding
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_GalvestonHoustonMember 		65.0skt_JointVentureDebtOutstanding
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_GalvestonHoustonMember
National Harbor [Member]    
Schedule of Equity Method Investments [Line Items]    
Ownership % 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_NationalHarborMember 		50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_NationalHarborMember
Square Feet 339,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_NationalHarborMember 		339,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_NationalHarborMember
Carrying Value of Investment (in millions) 9.1us-gaap_EquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_NationalHarborMember 		9.5us-gaap_EquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_NationalHarborMember
Total Joint Venture Debt (in millions) 83.7skt_JointVentureDebtOutstanding
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_NationalHarborMember 		83.7skt_JointVentureDebtOutstanding
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_NationalHarborMember
RioCan Canda [Member]    
Schedule of Equity Method Investments [Line Items]    
Ownership % 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_RiocanCandaMember 		50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_RiocanCandaMember
Square Feet 870,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_RiocanCandaMember 		870,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_RiocanCandaMember
Carrying Value of Investment (in millions) 132.0us-gaap_EquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_RiocanCandaMember 		132.5us-gaap_EquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_RiocanCandaMember
Total Joint Venture Debt (in millions) 14.3skt_JointVentureDebtOutstanding
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_RiocanCandaMember 		15.7skt_JointVentureDebtOutstanding
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_RiocanCandaMember
Savannah [Member]    
Schedule of Equity Method Investments [Line Items]    
Ownership % 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_SavannahMember 		[1] 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_SavannahMember 		[1]
Square Feet 0us-gaap_AreaOfRealEstateProperty
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_SavannahMember 		[1] 0us-gaap_AreaOfRealEstateProperty
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_SavannahMember 		[1]
Carrying Value of Investment (in millions) 47.4us-gaap_EquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_SavannahMember 		46.5us-gaap_EquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_SavannahMember 		[1]
Total Joint Venture Debt (in millions) 55.2skt_JointVentureDebtOutstanding
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_SavannahMember 		[1] 25.5skt_JointVentureDebtOutstanding
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_SavannahMember 		[1]
Westgate [Member]    
Schedule of Equity Method Investments [Line Items]    
Ownership % 58.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_WestgateMember 		58.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_WestgateMember
Square Feet 411,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_WestgateMember 		381,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_WestgateMember
Carrying Value of Investment (in millions) 13.9us-gaap_EquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_WestgateMember 		14.3us-gaap_EquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_WestgateMember
Total Joint Venture Debt (in millions) 62.0skt_JointVentureDebtOutstanding
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_WestgateMember 		54.0skt_JointVentureDebtOutstanding
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_WestgateMember
Wisconsin Dells [Member]    
Schedule of Equity Method Investments [Line Items]    
Ownership %   50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_WisconsinDellsMember
Square Feet   265,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_WisconsinDellsMember
Carrying Value of Investment (in millions)   2.4us-gaap_EquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_WisconsinDellsMember
Total Joint Venture Debt (in millions)   24.3skt_JointVentureDebtOutstanding
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_WisconsinDellsMember
Other [Member]    
Schedule of Equity Method Investments [Line Items]    
Square Feet 0us-gaap_AreaOfRealEstateProperty
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= us-gaap_EquityMethodInvesteeMember 		0us-gaap_AreaOfRealEstateProperty
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= us-gaap_EquityMethodInvesteeMember
Carrying Value of Investment (in millions) 0.1us-gaap_EquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= us-gaap_EquityMethodInvesteeMember 		1.5us-gaap_EquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= us-gaap_EquityMethodInvesteeMember
Total Joint Venture Debt (in millions) 0skt_JointVentureDebtOutstanding
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= us-gaap_EquityMethodInvesteeMember 		0skt_JointVentureDebtOutstanding
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= us-gaap_EquityMethodInvesteeMember
Charlotte [Member]    
Schedule of Equity Method Investments [Line Items]    
Ownership % 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_CharlotteMember 		[2] 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_CharlotteMember 		[2]
Square Feet 398,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_CharlotteMember 		[2] 398,000us-gaap_AreaOfRealEstateProperty
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_CharlotteMember 		[2]
Equity Method Investment Reported In Liabilities (0.6)skt_EquityMethodInvestmentReportedInLiabilities
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_CharlotteMember 		[2] (2.2)skt_EquityMethodInvestmentReportedInLiabilities
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_CharlotteMember 		[2]
Total Joint Venture Debt (in millions) $ 90.0skt_JointVentureDebtOutstanding
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_CharlotteMember 		[2] $ 90.0skt_JointVentureDebtOutstanding
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_CharlotteMember 		[2]
[1] 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.
[2] 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.