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CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares | Sep. 30, 2018 | Dec. 31, 2017
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Tanger Factory Outlet Centers, Inc. [Member] |  |
Common shares, par value (in dollars per share) | $ 0.01 | $ 0.01
Common shares, authorized (in shares) | 300,000,000 | 300,000,000
Common shares, issued (in shares) | 93,907,034 | 94,560,536
Common shares, outstanding (in shares) | 93,907,034 | 94,560,536
Tanger Properties Limited Partnership [Member] |  |
General partner units, outstanding (in units) | 1,000,000 | 1,000,000
Tanger Properties Limited Partnership [Member] | Class A Limited Partnership Units [Member] |  |
Limited partners units, outstanding (in units) | 4,995,433 | 4,995,433
Tanger Properties Limited Partnership [Member] | Class B Limited Partnership Units [Member] |  |
Limited partners units, outstanding (in units) | 92,907,034 | 93,560,536

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- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. + 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(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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