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	Mar. 31, 2021 USD ($) ft²	Feb. 28, 2021 USD ($)	Jan. 31, 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 ($)	Dec. 31, 2021 USD ($) ft²	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												$ 3,400,000	$ 3,600,000
Square Feet \| ft²																				878,000
Net proceeds from 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 from 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												665,000	765,000
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 from sale of assets							$ 5,500,000
Gain on sale of assets							2,000,000
Our Share of Proceeds from Sale of Other Real Estate							2,800,000
Our share of Gain (Loss) on Disposal							1,000,000
Cookstown [Member]
Schedule of Equity Method Investments [Line Items]
Square Feet \| ft²																		308,000
Les Factoreries St. Sauveur Property [Member]
Schedule of Equity Method Investments [Line Items]
Square Feet \| ft²			116,000
Bromont Outlet Mall Property [Member]
Schedule of Equity Method Investments [Line Items]
Square Feet \| ft²												161,000
Net proceeds from 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] \| 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]
Schedule of Equity Method Investments [Line Items]
Gain on sale of assets																		$ 503,000	1,983,000	$ 0
Unconsolidated Properties [Member] \| Galveston/Houston [Member]
Schedule of Equity Method Investments [Line Items]
Partner capital contribution to joint venture				$ 7,000,000
Unconsolidated Properties [Member] \| RioCan Canada [Member]
Schedule of Equity Method Investments [Line Items]
Repayments of Debt									$ 8,300,000
Unconsolidated Properties [Member] \| Les Factoreries St. Sauveur Property [Member]
Schedule of Equity Method Investments [Line Items]
Net proceeds from sale of assets			$ 9,400,000
Gain on sale of assets			(3,700,000)
Our Share of Proceeds From Sale Of Other Real Estate			4,700,000
Foreign currency loss			$ (3,600,000)
Unconsolidated Properties [Member] \| Mortgages [Member] \| Charlotte [Member]
Schedule of Equity Method Investments [Line Items]
Principal														$ 100,000,000			$ 90,000,000
Stated Interest Rate(s)														4.30%
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	$ 85,000,000									$ 85,000,000			$ 71,000,000
Basis spread on variable rate						1.85%	1.65%									1.65%
Number of mortgage extensions \| Extension																2
Proceeds from joint venture debt																$ 84,200,000
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
Basis spread on variable rate		1.50%		1.85%	1.65%										1.65%
Number of mortgage extensions \| Extension		2
Proceeds from joint venture debt															$ 14,500,000
Term of debt extension								6 months	1 year
Borrowing capacity		$ 70,000,000		$ 64,500,000	$ 80,000,000										$ 80,000,000
Unconsolidated Properties [Member] \| Mortgages [Member] \| National Harbor [Member]
Schedule of Equity Method Investments [Line Items]
Principal	$ 87,000,000												$ 95,000,000
Stated Interest Rate(s)													4.60%
Basis spread on variable rate	1.65%
Proceeds from joint venture debt													$ 7,400,000