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

Investments in Unconsolidated Real Estate Joint Ventures - Management, Leasing and Marketing Fees (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]
Management, leasing and other services	$ 5,419	$ 4,995	$ 3,664
Management and Marketing Fee [Member]
Schedule of Equity Method Investments [Line Items]
Management, leasing and other services	2,308	2,334	2,310
Leasing and other fees [Member]
Schedule of Equity Method Investments [Line Items]
Management, leasing and other services	126	162	142
Expense reimbursements from joint ventures [Member]
Schedule of Equity Method Investments [Line Items]
Management, leasing and other services	$ 2,985	$ 2,499	$ 1,212