Tanger Inc. Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Equity of the Company (Narrative) (Details) - USD ($)	1 Months Ended	3 Months Ended		6 Months Ended
	Feb. 28, 2019	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018	May 31, 2017
Tanger Factory Outlet Centers, Inc. [Member]
Authorized repurchase amount	$ 100,000,000.0						$ 125,000,000.0
Remaining amount authorized to be repurchase		$ 90,000,000.0		$ 90,000,000.0		$ 55,700,000
Additional amount authorized	$ 44,300,000
Expiration of the plan	2 years
Total number of shares purchased (in shares)		558,399	475,549	558,399	919,249
Average price paid per share		$ 17.89	$ 21.01	$ 17.89	$ 21.74
Shares repurchased exclusive of commissions and related fees		$ 9,989,000	$ 9,990,000	$ 9,989,000	$ 19,980,000
Tanger Properties Limited Partnership [Member]
Total number of shares purchased (in shares)		558,399	475,549	558,399	919,249