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

Annual report pursuant to Section 13 and 15(d)

Investments in Unconsolidated Real Estate Joint Ventures - Narrative (Details)

Investments in Unconsolidated Real Estate Joint Ventures - Narrative (Details)			1 Months Ended												5 Months Ended	12 Months Ended
	Nov. 30, 2018 USD ($)	Jun. 30, 2017 USD ($) Extension	Feb. 23, 2021 USD ($)	Dec. 31, 2020 USD ($) ft²	Nov. 30, 2020 USD ($)	Jun. 30, 2020	May 31, 2020 USD ($)	Oct. 31, 2019	Jul. 31, 2019 USD ($) ft²	May 31, 2019 USD ($) ft²	Dec. 31, 2018 USD ($)	Jun. 30, 2018 USD ($)	Jul. 31, 2017 USD ($)	Nov. 30, 2016 USD ($) Extension	May 31, 2018 USD ($)	Dec. 31, 2020 USD ($) ft²	Dec. 31, 2019 USD ($) ft²	Dec. 31, 2017 ft²	Dec. 31, 2016 ft²	Jul. 31, 2014 ft²	Nov. 30, 2013 ft²	Oct. 31, 2012 ft²
Schedule of Equity Method Investments [Line Items]
Difference in basis				$ 3,600,000												$ 3,600,000	$ 3,800,000
Square Feet \| ft²				878,000												878,000
Net proceeds on sale of assets																$ 128,505,000
Gain on sale of assets																$ 43,422,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] \| Land outparcel [Member]
Schedule of Equity Method Investments [Line Items]
Square Feet \| ft²									0
Net proceeds on sale of assets									$ 257,000
Gain on sale of assets									$ 0
Charlotte [Member]
Schedule of Equity Method Investments [Line Items]
Square Feet \| ft²				399,000												399,000	399,000			398,000
Ownership %				50.00%												50.00%	50.00%
Columbus [Member]
Schedule of Equity Method Investments [Line Items]
Square Feet \| ft²				355,000												355,000	355,000		355,000
Ownership %				50.00%												50.00%	50.00%
Galveston/Houston [Member]
Schedule of Equity Method Investments [Line Items]
Square Feet \| ft²				353,000												353,000	353,000					353,000
Ownership %				50.00%												50.00%	50.00%
National Harbor [Member]
Schedule of Equity Method Investments [Line Items]
Square Feet \| ft²				341,000												341,000	341,000				341,000
Ownership %				50.00%												50.00%	50.00%
RioCan Canada [Member]
Schedule of Equity Method Investments [Line Items]
Square Feet \| ft²				765,000												765,000	764,000
Ownership %				50.00%												50.00%	50.00%
Ottawa [Member]
Schedule of Equity Method Investments [Line Items]
Square Feet \| ft²																		357,000
Estimated square feet of expansion \| ft²																			39,000
Ottawa [Member] \| Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] \| Land outparcel [Member]
Schedule of Equity Method Investments [Line Items]
Net proceeds on sale of assets					$ 5,500,000
Gain on sale of assets					2,000,000.0
Our Share of Proceeds from Sale of Other Real Estate					2,800,000
Our share of Gain (Loss) on Disposal					1,000,000.0
Cookstown [Member]
Schedule of Equity Method Investments [Line Items]
Square Feet \| ft²				308,000												308,000
Les Factoreries St. Sauveur Property [Member]
Schedule of Equity Method Investments [Line Items]
Square Feet \| ft²				116,000												116,000
Bromont Outlet Mall Property [Member]
Schedule of Equity Method Investments [Line Items]
Square Feet \| ft²										161,000
Net proceeds on sale of assets										$ 6,400,000
Our Share of Proceeds from Sale of Other Real Estate										3,200,000
Foreign currency loss										$ 3,600,000
Mortgages [Member] \| Debt [Member]
Schedule of Equity Method Investments [Line Items]
Guarantor obligations, current carrying value				$ 21,900,000												$ 21,900,000
Mortgages [Member] \| Columbus [Member] \| Debt [Member]
Schedule of Equity Method Investments [Line Items]
Guarantor obligations, current carrying value				11,900,000	6,400,000											11,900,000
Unconsolidated Properties [Member] \| RioCan Canada [Member]
Schedule of Equity Method Investments [Line Items]
Repayments of Debt							$ 8,300,000
Unconsolidated Properties [Member] \| Mortgages [Member] \| Charlotte [Member]
Schedule of Equity Method Investments [Line Items]
Stated Interest Rate(s)												4.30%
Principal												$ 100,000,000.0			$ 90,000,000.0
Basis spread on variable rate															1.45%
Proceeds from joint venture debt												$ 9,300,000
Unconsolidated Properties [Member] \| Mortgages [Member] \| Columbus [Member]
Schedule of Equity Method Investments [Line Items]
Principal				$ 71,000,000.0	$ 85,000,000.0									$ 85,000,000.0		71,000,000.0
Basis spread on variable rate				1.85%	1.65%									1.65%
Proceeds from joint venture debt														$ 84,200,000
Number of mortgage extensions \| Extension														2
Term of debt extension								1 year						1 year
Unconsolidated Properties [Member] \| Mortgages [Member] \| Galveston/Houston [Member]
Schedule of Equity Method Investments [Line Items]
Principal		$ 65,000,000.0
Basis spread on variable rate		1.50%		1.65%									1.65%
Proceeds from joint venture debt													$ 14,500,000
Number of mortgage extensions \| Extension		2
Term of debt extension						6 months	1 year
Borrowing capacity		$ 70,000,000.0		$ 80,000,000.0									$ 80,000,000.0			$ 80,000,000.0
Unconsolidated Properties [Member] \| Mortgages [Member] \| Galveston/Houston [Member] \| Subsequent Event [Member]
Schedule of Equity Method Investments [Line Items]
Basis spread on variable rate			1.85%
Borrowing capacity			$ 64,500,000
Unconsolidated Properties [Member] \| Mortgages [Member] \| National Harbor [Member]
Schedule of Equity Method Investments [Line Items]
Stated Interest Rate(s)											4.60%
Principal	$ 87,000,000.0										$ 95,000,000.0
Basis spread on variable rate	1.65%
Proceeds from joint venture debt											$ 7,400,000