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					3 Months Ended	12 Months Ended
	Nov. 30, 2016 USD ($) Extension	Aug. 31, 2016	Feb. 28, 2015 USD ($)	Nov. 30, 2014 USD ($) ft²	Jul. 31, 2013 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2016 USD ($) ft²	Dec. 31, 2015 USD ($) ft²	Dec. 31, 2014 USD ($)	May 31, 2016 ft²	Mar. 31, 2016 ft²	Oct. 31, 2014 USD ($)
Schedule of Equity Method Investments [Line Items]
Difference in basis							$ 3,700,000	$ 3,900,000
Charlotte [Member]
Schedule of Equity Method Investments [Line Items]
Square Feet \| ft²							398,000	398,000
Ownership %							50.00%	50.00%
Columbus [Member]
Schedule of Equity Method Investments [Line Items]
Square Feet \| ft²							355,000	0
Company portion of contributed capital to the joint venture							$ 47,500,000
Partner's Portion of Contributed Capital to the Joint Venture							$ 47,500,000
Ownership %							50.00%	50.00%
Galveston/Houston [Member]
Schedule of Equity Method Investments [Line Items]
Square Feet \| ft²							353,000	353,000
Ownership %							50.00%	50.00%
National Harbor [Member]
Schedule of Equity Method Investments [Line Items]
Square Feet \| ft²							341,000	339,000
Ownership %							50.00%	50.00%
RioCan Canada [Member]
Schedule of Equity Method Investments [Line Items]
Square Feet \| ft²							901,000	870,000
Ownership %							50.00%	50.00%
Impairment of Real Estate							$ 5,800,000
Impairment Losses Related to Real Estate Partnerships							$ 2,900,000
Cookstown [Member]
Schedule of Equity Method Investments [Line Items]
Square Feet \| ft²							308,000
Estimated square feet of expansion \| ft²				149,000
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
Ottawa [Member]
Schedule of Equity Method Investments [Line Items]
Square Feet \| ft²							316,000
Square feet of anchor tenant \| ft²											28,000
Estimated square feet of expansion \| ft²							40,000
Savannah [Member]
Schedule of Equity Method Investments [Line Items]
Economic interest percentage in joint venture								98.00%
Square Feet \| ft²								377,000		419,000
Ownership %								50.00%
Estimated square feet of expansion \| ft²										42,000
Wisconsin Dells [Member]
Schedule of Equity Method Investments [Line Items]
Net sales price from sale of joint venture			$ 15,600,000
Company's share of sales price of sale of joint venture			27,700,000
Company's share of joint venture debt			$ 12,100,000
Gain on sale of assets and interests in unconsolidated entities						$ 13,700,000
Mortgages [Member] \| Savannah [Member]
Schedule of Equity Method Investments [Line Items]
Basis spread on variable rate		1.65%
Joint Venture Interest [Member]
Schedule of Equity Method Investments [Line Items]
Impairment of Real Estate							$ 5,838,000	$ 0	$ 0
Joint Venture Interest [Member] \| Mortgages [Member]
Schedule of Equity Method Investments [Line Items]
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net							1,600,000	3,300,000
Joint Venture Interest [Member] \| Mortgages [Member] \| Charlotte [Member]
Schedule of Equity Method Investments [Line Items]
Principal				$ 90,000,000
Basis spread on variable rate				1.45%
Term of mortgage extension				1 year
Proceeds from joint venture debt				$ 89,400,000
Joint Venture Interest [Member] \| Mortgages [Member] \| Columbus [Member]
Schedule of Equity Method Investments [Line Items]
Principal	$ 85,000,000
Basis spread on variable rate	1.65%
Number of mortgage extensions \| Extension	2
Term of mortgage extension	1 year
Proceeds from joint venture debt	$ 84,200,000
Joint Venture Interest [Member] \| Mortgages [Member] \| Galveston/Houston [Member]
Schedule of Equity Method Investments [Line Items]
Principal					$ 70,000,000
Basis spread on variable rate					1.50%
Term of mortgage extension					1 year
Proceeds from joint venture debt				19,000,000	$ 65,000,000
Joint Venture Interest [Member] \| Mortgages [Member] \| National Harbor [Member]
Schedule of Equity Method Investments [Line Items]
Principal							87,000,000
Maximum Borrowing Capacity				$ 87,000,000								$ 62,000,000
Tanger Factory Outlet Centers, Inc [Member]
Schedule of Equity Method Investments [Line Items]
Gain on sale of assets and interests in unconsolidated entities							$ 6,305,000	$ 120,447,000	$ 7,513,000
National Harbor [Member] \| Joint Venture Interest [Member] \| Mortgages [Member]
Schedule of Equity Method Investments [Line Items]
Basis spread on variable rate				1.65%