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Equity-Based Compensation of the Operating Partnership Restricted Unit Activity (Details) (Tanger Properties Limited Partnership [Member], USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012 Units | Dec. 31, 2011 Units | Dec. 31, 2010
Schedule of Restricted Unit Activity [Line Items] |  |  |
Equity Based Compensation Arrangement by Equity-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value | $ 10.6 | $ 7.1 | $ 4.7
Equity Based Compensation Arrangement by Equity-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number | 261,998 | 197,834 |
Equity Based Compensation Arrangement by Equity-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value | 97.56 | 83.70 |
Equity Based Compensation Arrangement by Equity-based Payment Award, Equity Instruments Other than Options, Grants in Period | 142,750 |  |
Equity Based Compensation Arrangement by Equity-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value | 111.59 |  |
Equity Based Compensation Arrangement by Equity-based Payment Award, Equity Instruments Other than Options, Vested in Period | (77,336) |  |
Equity Based Compensation Arrangement by Equity-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value | 87.69 |  |
Equity Based Compensation Arrangement by Equity-based Payment Award, Equity Instruments Other than Options, Forfeited in Period | (1,250) |  |
Equity Based Compensation Arrangement by Equity-based Payment Award, Equity Instruments Other than Options, Forfeited in Period, Weighted Average Grant Date Fair Value | 118.00 |  |
Fully Vested [Member] | Restricted Units [Member] |  |  |
Schedule of Restricted Unit Activity [Line Items] |  |  |
Number of Restricted Units Granted to CEO | 11,250 |  |

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