Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Principles of Consolidation (Details)

v2.4.1.9
Summary of Significant Accounting Policies - Principles of Consolidation (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Equity method investments $ 208.0us-gaap_EquityMethodInvestments $ 140.2us-gaap_EquityMethodInvestments
Westgate [Member]    
Equity method investments 14.3us-gaap_EquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_WestgateMember 		16.1us-gaap_EquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_WestgateMember
Savannah [Member]    
Equity method investments $ 46.5us-gaap_EquityMethodInvestments
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= skt_SavannahMember 		[1]  
[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.