Accumulated Other Comprehensive Income (Loss) of the Operating Partnership (Details) - Tanger Properties Limited Partnership [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	$ 358,883
Ending Balance	483,014
Interest rate swap gain (loss) to be reclassified within twelve months	905
Foreign Currency [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(24,680)	$ (26,463)
Other comprehensive income (loss) before reclassifications	1,009	(7,733)
Reclassification out of accumulated other comprehensive income (loss) into other income (expense) for foreign currency and interest expense for cash flow hedges	3,630
Ending Balance	(20,041)	(34,196)
Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(3,359)	(425)
Other comprehensive income (loss) before reclassifications	1,584	(5,674)
Reclassification out of accumulated other comprehensive income (loss) into other income (expense) for foreign currency and interest expense for cash flow hedges	414	(2)
Ending Balance	(1,361)	(6,101)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(28,039)	(26,888)
Other comprehensive income (loss) before reclassifications	2,593	(13,407)
Reclassification out of accumulated other comprehensive income (loss) into other income (expense) for foreign currency and interest expense for cash flow hedges	4,044	(2)
Ending Balance	$ (21,402)	$ (40,297)