Summary of Significant Accounting Policies - Equity Method Investment and Unit Split (Details) (USD $) In Millions, unless otherwise specified			1 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Aug. 31, 2013 Tanger Properties Limited Partnership [Member]	Dec. 31, 2013 Westgate [Member]	Dec. 31, 2012 Westgate [Member]
Equity method investments	$ 140.2	$ 126.6		$ 16.1	$ 19.1
Stock split, conversion ratio			4
Exchange ratio of partnership units for common shares			1
Partnership unit exchange ratio			4

Exchange Ratio of Partnership Units for Common Shares, Number of common shares a holder of a partnership unit would receive in exchange for that partnership unit.

No definition available.

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- Definition

Partnership Unit Exchange Ratio - The number of common shares that would have been received in exchange for one partnership unit, prior to the four for one split in August 2013.

+ References

No definition available.

+ Details

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- Definition

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.12)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=16385135&loc=d3e33749-111570

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- Definition

Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Stock Split

-URI http://asc.fasb.org/extlink&oid=6525746

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 4

-Subparagraph (SAB TOPIC 4.C)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187143-122770

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