The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121555522&loc=d3e12069-110248

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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- Details

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Namespace Prefix:
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- Details

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Namespace Prefix:
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- Details

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Namespace Prefix:
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- Details

Name:	dei_LegalEntityAxis=skt_TangerFactoryOutletCentersInc.Member
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Debt Guaranteed by the Company (Details) - Debt [Member] - USD ($) $ in Thousands	Sep. 30, 2021	Jul. 31, 2021	Dec. 31, 2020
Tanger Properties Limited Partnership [Member] \| Line of Credit [Member]
Line of Credit Facility [Line Items]
Line of credit borrowing capacity	$ 520,000	$ 520,000
Tanger Factory Outlet Centers, Inc. [Member] \| Line of Credit [Member]
Line of Credit Facility [Line Items]
Unsecured term loan or line of credit	0		$ 0
Tanger Factory Outlet Centers, Inc. [Member] \| Unsecured Term Loan [Member]
Line of Credit Facility [Line Items]
Unsecured term loan or line of credit	$ 300,000		$ 350,000