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Fair Value Measurement (Details) (USD $)
Dec. 31, 2011
Dec. 31, 2010
Tanger Factory Outlet Centers, Inc
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term Debt $ 1,025,542,000 $ 714,616,000
Tanger Properties Limited Partnership
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term Debt, Fair Value 1,100,000,000 800,000,000
Long-term Debt $ 1,025,542,000 $ 714,616,000