Business (Details) ft² in Millions	Mar. 31, 2020 ft² shares OutletCenter subsidiary
Entity Information [Line Items]
Number of Operating Partnership Units Owned by the Company | shares	93,076,701
Exchange ratio of Partnership Units for common shares	1
Consolidated Properties [Member]
Entity Information [Line Items]
Number of outlet centers	32
Total gross leaseable area of outlet centers (in square feet) | ft²	12.0
Unconsolidated Properties [Member]
Entity Information [Line Items]
Number of outlet centers	7
Total gross leaseable area of outlet centers (in square feet) | ft²	2.2
Unconsolidated Properties [Member] | CANADA
Entity Information [Line Items]
Number of outlet centers	3
Tanger Factory Outlet Centers, Inc. [Member]
Entity Information [Line Items]
Number of wholly-owned subsidiaries | subsidiary	2
Tanger Properties Limited Partnership [Member] | Class A Limited Partnership Units [Member]
Entity Information [Line Items]
Number of Operating Partnership units owned by the Operating Partnership and other limited partners | shares	4,911,173