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

Annual report pursuant to Section 13 and 15(d)

Debt of the Operating Partnership - Narrative (Details)

Debt of the Operating Partnership - Narrative (Details) - USD ($)				1 Months Ended					12 Months Ended
	Sep. 30, 2018	Jan. 31, 2018	Dec. 31, 2017	Oct. 31, 2018	Feb. 28, 2018	Jan. 31, 2018	Aug. 31, 2017	Jul. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Mar. 31, 2018	Nov. 30, 2017
Tanger Properties Limited Partnership [Member]
Debt Instrument [Line Items]
Principal balance of debt									$ 1,582,309,000	$ 1,730,779,000
Debt retirement make whole premium									0	0	$ 34,143,000
Tanger Properties Limited Partnership [Member] \| Mortgages [Member]
Debt Instrument [Line Items]
Collateral for mortgages payable									174,200,000
Tanger Properties Limited Partnership [Member] \| Mortgages [Member] \| Southaven [Member]
Debt Instrument [Line Items]
Term of debt extension					2 years
Principal balance of debt		$ 60,000,000.0			$ 51,400,000	$ 60,000,000.0			$ 51,400,000	51,400,000
Tanger Properties Limited Partnership [Member] \| Mortgages [Member] \| Southaven [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Basis spread on variable rate		1.75%			1.80%				1.80%
Tanger Properties Limited Partnership [Member] \| Mortgages [Member] \| Foxwoods [Member]
Debt Instrument [Line Items]
Principal balance of debt													$ 70,300,000
Tanger Properties Limited Partnership [Member] \| Line of Credit [Member]
Debt Instrument [Line Items]
Term of debt extension						1 year
Liquidity Line, Maximum Borrowings									$ 20,000,000.0
Syndicated Line, Maximum Borrowings									580,000,000.0
Line of Credit Facility, Syndicated Line, Potential Maximum Borrowings if Accordion Feature is Utilized		$ 1,200,000,000	$ 1,000,000,000.0			$ 1,200,000,000			1,200,000,000		1,000,000,000.0
Letters of Credit Outstanding, Amount									$ 170,000
Percentage of funds from operations allowed on a cumulative basis required for debt covenants									95.00%
Principal balance of debt									$ 0	145,100,000
Tanger Properties Limited Partnership [Member] \| Line of Credit [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Basis spread on variable rate			0.90%			0.875%			0.875%
Tanger Properties Limited Partnership [Member] \| Unsecured Term Loan [Member]
Debt Instrument [Line Items]
Principal balance of debt	$ 325,000,000.0			$ 350,000,000.0					$ 350,000,000	350,000,000
Proceeds from debt				$ 25,000,000.0
Tanger Properties Limited Partnership [Member] \| Unsecured Term Loan [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Basis spread on variable rate	0.95%			0.90%					0.90%
Tanger Properties Limited Partnership [Member] \| Senior Notes [Member] \| 3.875% 2027 Senior Notes [Member]
Debt Instrument [Line Items]
Principal balance of debt								$ 300,000,000.0	$ 300,000,000	$ 300,000,000
Stated Interest Rate(s)								3.875%	3.875%
Notes price at percentage of the principal amount								99.579%
Yield to maturity								3.926%
Proceeds from Issuance of Long-term Debt								$ 295,900,000
Tanger Properties Limited Partnership [Member] \| Senior Notes [Member] \| 6.125% 2020 Senior Notes [Member]
Debt Instrument [Line Items]
Principal balance of debt							$ 300,000,000.0
Stated Interest Rate(s)							6.125%
Debt retirement make whole premium							$ 34,100,000
Write off of debt discount and deferred debt issuance costs							$ 1,500,000
Tanger Properties Limited Partnership [Member] \| Debt [Member] \| Line of Credit [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity		600,000,000.0	$ 520,000,000.0			$ 600,000,000.0			$ 600,000,000.0		$ 520,000,000.0
Loan origination costs		$ 2,300,000				$ 2,300,000
Designated as Hedging Instrument [Member]
Debt Instrument [Line Items]
Notional Amount									$ 390,000,000
Designated as Hedging Instrument [Member] \| Southaven [Member]
Debt Instrument [Line Items]
Derivative, Fixed Interest Rate												2.47%
Notional Amount												$ 40,000,000.0