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
Mar. 31, 2021
Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total fair value of debt $ 1,632,579 $ 1,639,803
Recorded value of debt 1,542,760 1,567,886
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 1,226,528 1,207,531
Fair Value, Inputs, Level 3 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total fair value of debt $ 406,051 $ 432,272