Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Debt) (Details)

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Fair Value Measurements (Debt) (Details) - Tanger Properties Limited Partnership [Member] - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total fair value of debt $ 1,704,812 $ 1,775,540
Recorded value of debt 1,747,660 1,763,651
Fair Value, Inputs, Level 1 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total fair value of debt 0 0
Fair Value, Inputs, Level 2 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total fair value of debt 1,086,988 1,139,064
Fair Value, Inputs, Level 3 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total fair value of debt $ 617,824 $ 636,476