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Summary of Significant Accounting Policies - Deferred Charges (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Accounting Policies [Abstract] |  |  |
Deferred Lease Costs Capitalized | $ 6.2skt_DeferredLeaseCostsCapitalized | $ 4.0skt_DeferredLeaseCostsCapitalized | $ 5.1skt_DeferredLeaseCostsCapitalized
Deferred lease costs amount related to salaries and related costs | $ 5.1skt_Deferredleasecostsamountrelatedtosalariesandrelatedcosts | $ 2.9skt_Deferredleasecostsamountrelatedtosalariesandrelatedcosts | $ 4.5skt_Deferredleasecostsamountrelatedtosalariesandrelatedcosts

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- Definition Deferred lease costs amount related to salaries and related costs + References No definition available. + Details
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Namespace Prefix: | skt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Deferred Lease Costs Capitalized - Deferred Lease Costs Capitalized during the period include internal lease costs and amounts paid to third-party brokers. + References No definition available. + Details
Name: | skt_DeferredLeaseCostsCapitalized
Namespace Prefix: | skt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration