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

Accumulated Other Comprehensive Loss of the Company - Balances of Each Component of AOCI (Details)

Accumulated Other Comprehensive Loss of the Company - Balances of Each Component of AOCI (Details) - Tanger Factory Outlet Centers, Inc. [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ 505,535	$ 612,302	$ 705,441
Ending balance	456,109	505,535	612,302
Interest rate swap gain (loss) to be reclassified within twelve months	(344)
Foreign Currency Tanger Factory Outlet Centers, Inc. Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(32,610)	(24,360)	(32,087)
Other comprehensive income (loss) before reclassifications	4,062	(8,250)	7,727
Reclassification out of accumulated other comprehensive income into interest expense	3,454	0	0
Ending balance	(25,094)	(32,610)	(24,360)
Cash flow hedges Tanger Factory Outlet Centers, Inc. Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Other comprehensive income (loss) before reclassifications	(3,755)
Reclassification out of accumulated other comprehensive income into interest expense	(2,105)
Ending balance	(401)
Cash flow hedges Tanger Factory Outlet Centers, Inc. Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	5,459	5,075	3,792
Other comprehensive income (loss) before reclassifications		2,335	1,020
Reclassification out of accumulated other comprehensive income into interest expense		(1,951)	263
Ending balance		5,459	5,075
Total Tanger Factory Outlet Centers, Inc. Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(27,151)	(19,285)	(28,295)
Other comprehensive income (loss) before reclassifications	307	(5,915)	8,747
Reclassification out of accumulated other comprehensive income into interest expense	1,349	(1,951)	263
Ending balance	(25,495)	(27,151)	(19,285)
Foreign Currency noncontrolling interest [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(1,770)	(1,329)	(1,740)
Other comprehensive income (loss) before reclassifications	217	(441)	411
Reclassification out of accumulated other comprehensive income into interest expense	184	0	0
Ending balance	(1,369)	(1,770)	(1,329)
Cash Flow Hedges noncontrolling interest [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	290	269	201
Other comprehensive income (loss) before reclassifications		126	55
Reclassification out of accumulated other comprehensive income into interest expense		(105)	13
Ending balance		290	269
Cash Flow Hedges noncontrolling interest [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Other comprehensive income (loss) before reclassifications	(202)
Reclassification out of accumulated other comprehensive income into interest expense	(112)
Ending balance	(24)
Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(1,480)	(1,060)	(1,539)
Other comprehensive income (loss) before reclassifications	15	(315)	466
Reclassification out of accumulated other comprehensive income into interest expense	72	(105)	13
Ending balance	$ (1,393)	$ (1,480)	$ (1,060)