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CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY (UNAUDITED) (Parenthetical) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2013 | Dec. 31, 2012
Tanger Properties Limited Partnership [Member] |  |
Common distributions (in dollars per share) | 0.84 | 3.32
Common units issued upon exercise of options | 1,800 | 9,425
Restricted units granted, net of forfeitures | 84,343 | 141,500
Tanger Factory Outlet Centers, Inc [Member] |  |
Issuance of common shares upon exercise of options | 7,200 | 37,700
Grant of restricted shares, net of forfeitures | 337,373 | 566,000
Dividends paid per common share (in dollars per share) | $ 0.21 | $ 0.8300
Exchange of Operating Partnership units for common shares | 3,545 | 6,730,028
Common shares issued in exchange for Operating Partnership units | 14,180 | 1,682,507

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