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

Subsequent Events (Details)

Subsequent Events (Details) - USD ($)	1 Months Ended					12 Months Ended	21 Months Ended
Subsequent Events (Details) - USD ($)	Feb. 22, 2018	Jan. 31, 2018	Dec. 31, 2017	Oct. 31, 2015	Apr. 30, 2015	Dec. 31, 2017	Sep. 30, 2015	Dec. 31, 2016
Tanger Factory Outlet Centers, Inc. [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Common Stock, Dividends, Per Share, Declared		$ 0.3425
Tanger Properties Limited Partnership [Member]
Subsequent Event [Line Items]
Principal			$ 1,780,562,000			$ 1,780,562,000		$ 1,705,998,000
Tanger Properties Limited Partnership [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Distributions Per Limited Partnership Unit Outstanding, Basic		$ 0.3425
Line of Credit [Member] \| Tanger Properties Limited Partnership [Member]
Subsequent Event [Line Items]
Maximum Borrowing Capacity			520,000,000			520,000,000
Line of Credit Facility, Syndicated Line, Potential Maximum Borrowings if Accordion Feature is Utilized			1,000,000,000.0			1,000,000,000.0
Principal			208,100,000			208,100,000		61,000,000
Line of Credit [Member] \| Tanger Properties Limited Partnership [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Term of debt extension		1 year
Line of Credit Facility, Syndicated Line, Potential Maximum Borrowings if Accordion Feature is Utilized		$ 1,200,000,000.0
Line of Credit [Member] \| Debt [Member] \| Tanger Properties Limited Partnership [Member]
Subsequent Event [Line Items]
Maximum Borrowing Capacity			$ 520,000,000			$ 520,000,000
Line of Credit [Member] \| Debt [Member] \| Tanger Properties Limited Partnership [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Maximum Borrowing Capacity		600,000,000
Loan origination costs		$ 2,300,000
London Interbank Offered Rate (LIBOR) [Member] \| Line of Credit [Member] \| Tanger Properties Limited Partnership [Member]
Subsequent Event [Line Items]
Basis spread on variable rate			0.90%	0.90%		0.90%	1.00%
London Interbank Offered Rate (LIBOR) [Member] \| Line of Credit [Member] \| Tanger Properties Limited Partnership [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Basis spread on variable rate		0.875%
Southaven [Member] \| Mortgages [Member] \| Tanger Properties Limited Partnership [Member]
Subsequent Event [Line Items]
Maximum Borrowing Capacity					$ 60,000,000
Term of debt extension					2 years
Principal			$ 60,000,000			$ 60,000,000		$ 59,277,000
Southaven [Member] \| Mortgages [Member] \| Tanger Properties Limited Partnership [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Term of debt extension	2 years
Principal	$ 51,400,000
Southaven [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| Mortgages [Member] \| Tanger Properties Limited Partnership [Member]
Subsequent Event [Line Items]
Basis spread on variable rate					1.75%	1.75%
Southaven [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| Mortgages [Member] \| Tanger Properties Limited Partnership [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Basis spread on variable rate	1.80%
Performance Shares [Member] \| Tanger Factory Outlet Centers, Inc. [Member]
Subsequent Event [Line Items]
Share-based Award Measurement Period						3 years
2018 OPP [Member] \| Performance Shares [Member] \| Tanger Factory Outlet Centers, Inc. [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Share-based Award Measurement Period	3 years
Year one [Member] \| Performance Shares [Member] \| Tanger Factory Outlet Centers, Inc. [Member]
Subsequent Event [Line Items]
Vesting Percentage			50.00%			50.00%
Year one [Member] \| 2018 OPP [Member] \| Performance Shares [Member] \| Tanger Factory Outlet Centers, Inc. [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Vesting Percentage	50.00%
Year two [Member] \| Performance Shares [Member] \| Tanger Factory Outlet Centers, Inc. [Member]
Subsequent Event [Line Items]
Vesting Percentage			50.00%			50.00%
Year two [Member] \| 2018 OPP [Member] \| Performance Shares [Member] \| Tanger Factory Outlet Centers, Inc. [Member] \| Subsequent Event [Member]
Subsequent Event [Line Items]
Vesting Percentage	50.00%