Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements Debt (Details)

v3.20.4
Fair Value Measurements Debt (Details) - Tanger Properties Limited Partnership [Member] - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value of debt $ 1,639,803 $ 1,603,814
Recorded value of debt 1,567,886 1,569,773
Level 1 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value of debt 0 0
Level 2 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value of debt 1,207,531 1,169,481
Level 3 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Fair value of debt $ 432,272 $ 434,333