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Summary of Significant Accounting Policies - Deferred Charges (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Accounting Policies [Abstract] |  |  |
Deferred lease costs capitalized-payroll and related costs | $ 6,007 | $ 6,098 | $ 6,210
Total deferred lease costs capitalized | $ 6,703 | $ 6,584 | $ 7,013

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

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- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration