Net Income per Share (Tables)

9 Months Ended

Sep. 30, 2011

Net Income per Share [Abstract]

Allocation of net income available to common shareholders using the two-class method

	Three Months Ended September 30,
	2011				2010
	Basic		Diluted		Basic		Diluted
Net income	$	26,296,447	$	26,296,447	$	18,790,963	$	18,790,963
Net income attributable to MercadoLibre, Inc. corresponding to unvested restricted shares		—		—		—		—
Net income attributable to Noncontrolling interests		522		522		—		—
Net income attributable to MercadoLibre, Inc. corresponding to common stock	$	26,295,925	$	26,295,925	$	18,790,963	$	18,790,963

	Nine Months Ended September 30,
	2011				2010
	Basic		Diluted		Basic		Diluted
Net income	$	55,174,909	$	55,174,909	$	40,085,526	$	40,085,526
Net income attributable to MercadoLibre, Inc. corresponding to unvested restricted shares		—		—		4,474		4,474
Net income attributable to Noncontrolling interests		522		522		—		—
Net income attributable to MercadoLibre, Inc. corresponding to common stock	$	55,174,387	$	55,174,387	$	40,081,052	$	40,081,052

Net income per share of common stock

	Three Months Ended September 30,
	2011				2010
	Basic		Diluted		Basic		Diluted
Net income attributable to MercadoLibre, Inc. per common share	$	0.60	$	0.60	$	0.43	$	0.43
Numerator:
Net income attributable to MercadoLibre, Inc.	$	26,295,925	$	26,295,925	$	18,790,963	$	18,790,963
Denominator:
Weighted average of common stock outstanding for Basic earnings per share		44,141,925		44,141,925		44,129,762		44,129,762
Adjustment for stock options		—		4,513		—		12,949
Adjustment for shares granted under LTRP		—		4,780		—		8,656
Adjusted weighted average of common stock outstanding for Diluted earnings per share		44,141,925		44,151,218		44,129,762		44,151,367

	Nine Months Ended September 30,
	2011				2010
	Basic		Diluted		Basic		Diluted
Net income attributable to MercadoLibre, Inc. per common share	$	1.25	$	1.25	$	0.91	$	0.91
Numerator:
Net income attributable to MercadoLibre, Inc.	$	55,174,387	$	55,174,387	$	40,081,052	$	40,081,052
Denominator:
Weighted average of common stock outstanding for Basic earnings per share		44,137,176		44,137,176		44,121,539		44,121,539
Adjustment for stock options		—		8,894		—		14,821
Adjustment for shares granted under LTRP		—		4,802		—		8,318
Adjusted weighted average of common stock outstanding for Diluted earnings per share		44,137,176		44,150,872		44,121,539		44,144,678