Cover - USD ($)
12 Months Ended
Dec. 31, 2020
Feb. 12, 2021
Jun. 30, 2020
Entity Information [Line Items]   
Entity Registrant NameTANGER FACTORY OUTLET CENTERS, INC  
Entity Central Index Key0000899715  
Document Type10-K  
Amendment Flagfalse  
Document Period End DateDec. 31, 2020  
Current Fiscal Year End Date--12-31  
Document Fiscal Year Focus2020  
Document Fiscal Period FocusFY  
Document Annual Reporttrue  
Document Transition Reportfalse  
Entity File Number1-11986  
Entity Incorporation, State or Country CodeNC  
Entity Tax Identification Number56-1815473  
Entity Address, Address Line One3200 Northline Avenue  
Entity Address, Address Line TwoSuite 360  
Entity Address, City or TownGreensboro  
Entity Address, State or ProvinceNC  
Entity Address, Postal Zip Code27408  
City Area Code336  
Local Phone Number292-3010  
Title of 12(b) SecurityCommon Shares, $.01 par value  
Trading SymbolSKT  
Security Exchange NameNYSE  
Entity Well-known Seasoned IssuerYes  
Entity Voluntary FilersNo  
Entity Current Reporting StatusYes  
Entity Interactive Data CurrentYes  
Entity Filer CategoryLarge Accelerated Filer  
Entity Small Businessfalse  
Entity Emerging Growth Companyfalse  
ICFR Auditor Attestation Flagtrue  
Entity Shell Companyfalse  
Entity Public Float  $ 652,857,378
Entity Common Stock, Shares Outstanding 93,569,801 
Tanger Properties Limited Partnership [Member]   
Entity Information [Line Items]   
Entity Registrant NameTANGER PROPERTIES LIMITED PARTNERSHIP  
Entity Central Index Key0001004036  
Entity File Number333-3526-01  
Entity Incorporation, State or Country CodeNC  
Entity Tax Identification Number56-1822494  
No Trading Symbol Flagtrue  
Entity Well-known Seasoned IssuerYes  
Entity Voluntary FilersNo  
Entity Current Reporting StatusYes  
Entity Interactive Data CurrentYes  
Entity Filer CategoryNon-accelerated Filer  
Entity Small Businessfalse  
Entity Emerging Growth Companyfalse  
ICFR Auditor Attestation Flagtrue  
Entity Shell Companyfalse  

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