Tanger Inc. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Debt of the Operating Partnership (Narrative) (Details)

Debt of the Operating Partnership (Narrative) (Details)	1 Months Ended					6 Months Ended
Debt of the Operating Partnership (Narrative) (Details)	Jul. 31, 2020 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Feb. 29, 2020 USD ($)	Jan. 31, 2020	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	May 31, 2020	Dec. 31, 2019 USD ($)
Debt Instrument [Line Items]
Maximum thresholds for total leverage and unsecured leverage		0.65				0.65		0.60
Netting of cash balances in excess		$ 30,000,000.0				$ 30,000,000.0
Property Management Fee, Percent Fee		3.00%
LIBOR floor interest rate		0.25%				0.25%
Repayments of Long-term Lines of Credit		$ 200,000,000.0
Minimum [Member]
Debt Instrument [Line Items]
Percent of guaranty of completion and principal guaranty		5.00%				5.00%
Maximum [Member]
Debt Instrument [Line Items]
Percent of guaranty of completion and principal guaranty		100.00%				100.00%
Tanger Properties Limited Partnership [Member]
Debt Instrument [Line Items]
Proceeds from revolving credit facility						$ 634,030,000	$ 207,500,000
Repayments of Long-term Lines of Credit						234,200,000	334,100,000
Tanger Properties Limited Partnership [Member] \| Mortgages [Member]
Debt Instrument [Line Items]
Net book value of collateral for mortgages payable		$ 169,500,000				169,500,000
Tanger Properties Limited Partnership [Member] \| Line of Credit [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Liquidity Line, Maximum Borrowings, Included in Total Line of Credit Maximum Borrowings		20,000,000.0				20,000,000.0
Line of Credit Facility, Syndicated Line, Maximum Borrowings, Included in Total Line of Credit Maximum Borrowings		580,000,000.0				580,000,000.0
Line of Credit Facility, Syndicated Line, Potential Maximum Borrowings if Accordion Feature is Utilized		1,200,000,000				$ 1,200,000,000
Percentage of funds from operations allowed on a cumulative basis to pay dividends						95.00%
Proceeds from revolving credit facility			$ 599,800,000
Line of Credit Facility, Commitment Fee Percentage				0.20%	0.15%
Tanger Properties Limited Partnership [Member] \| Debt [Member] \| Line of Credit [Member]
Debt Instrument [Line Items]
Line of credit borrowing capacity		600,000,000.0	$ 600,000,000.0	$ 600,000,000.0		$ 600,000,000.0
Tanger Factory Outlet Centers, Inc. [Member]
Debt Instrument [Line Items]
Proceeds from revolving credit facility						634,030,000	207,500,000
Repayments of Long-term Lines of Credit						234,200,000	$ 334,100,000
Tanger Factory Outlet Centers, Inc. [Member] \| Debt [Member] \| Mortgages [Member]
Debt Instrument [Line Items]
Maximum amount of unconsolidated joint venture debt guaranteed by the Company		16,400,000				16,400,000
Tanger Factory Outlet Centers, Inc. [Member] \| Debt [Member] \| Line of Credit [Member]
Debt Instrument [Line Items]
Maximum amount of unconsolidated joint venture debt guaranteed by the Company		399,830,000				399,830,000			$ 0
Tanger Factory Outlet Centers, Inc. [Member] \| Debt [Member] \| Unsecured Term Loan [Member]
Debt Instrument [Line Items]
Maximum amount of unconsolidated joint venture debt guaranteed by the Company		$ 350,000,000				$ 350,000,000			$ 350,000,000
London Interbank Offered Rate (LIBOR) [Member] \| Tanger Properties Limited Partnership [Member] \| Line of Credit [Member]
Debt Instrument [Line Items]
Basis spread on variable rate				1.00%	0.875%	1.00%
London Interbank Offered Rate (LIBOR) [Member] \| Tanger Properties Limited Partnership [Member] \| Unsecured Term Loan [Member]
Debt Instrument [Line Items]
Basis spread on variable rate				1.00%	0.90%	1.00%
Subsequent Event [Member]
Debt Instrument [Line Items]
Repayments of Long-term Lines of Credit	$ 320,000,000.0