Tanger Inc. Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Rental Property (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Accounting Policies [Abstract]
Buildings and Improvements, Estimated Useful Life	33 years
Property, Plant and Equipment, Useful Life, Minimum	7 years
Land Improvements Useful Life	15 years
Purchase Price Allocated to Assets, Useful Life, Minimum	3 years
Purchase Price Allocated to Assets, Useful Life, Maximum	33 years
Interest Costs Incurred, Capitalized	$ 1,200,000	$ 393,000	$ 1,500,000
Internal Development Costs, Captialized	1,800,000	1,400,000	1,500,000
Real Estate Depreciation	$ 73,700,000	$ 66,200,000	$ 64,500,000