New Accounting Pronouncements New Accounting Pronouncements (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
Sep. 30, 2018	Dec. 31, 2017
New Accounting Pronouncements [Abstract]
Deferred lease costs amount related to salaries and related costs	$ 4.3	$ 6.1

Deferred lease costs amount related to salaries and related costs

No definition available.

Name:	skt_Deferredleasecostsamountrelatedtosalariesandrelatedcosts
Namespace Prefix:	skt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration