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Net Income per Share (Details) (USD $) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Mar. 31, 2012 | Mar. 31, 2011 | Dec. 31, 2011
Allocation of net income available to common shareholders using the two-class method |  |  |
Net income | $ 19,637,038 | $ 14,057,634 | $ 62,722,419
Net income available to Noncontrolling interests | (2,428) |  |
Net income attributable to Mercadolibre, Inc corresponding to common stock before changes in non-controlling interest | 19,634,610 | 14,057,634 |
Change in redeemable amount of noncontrolling interest | 316,298 |  | (610,853)
Net income attributable to MercadoLibre, Inc. corresponding to common stock, Diluted | $ 19,950,908 | $ 14,057,634 |

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