Supplementary Income Statement Information (Details) - Tanger Factory Outlet Centers, Inc. [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Advertising and promotion	$ 26,022	$ 27,066	$ 29,046
Common area maintenance	70,472	73,367	71,195
Real estate taxes	33,430	32,836	30,695
Other operating expenses	27,810	27,188	24,299
Operating Costs and Expenses	$ 157,734	$ 160,457	$ 155,235