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Long Term Retention Plan (Long Term Retention Plans Accrued Compensation Expense) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Long Term Retention Plan 2009 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Long term retention plan	$ (12)us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount / us-gaap_PlanNameAxis = meli_LongTermRetentionPlanTwoZeroZeroNineMember	$ (351)us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount / us-gaap_PlanNameAxis = meli_LongTermRetentionPlanTwoZeroZeroNineMember
Long Term Retention Plan 2010 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Long term retention plan	120us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount / us-gaap_PlanNameAxis = meli_LongTermRetentionPlanTwoZeroOneZeroMember	(183)us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount / us-gaap_PlanNameAxis = meli_LongTermRetentionPlanTwoZeroOneZeroMember
Long Term Retention Plan 2011 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Long term retention plan	142us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount / us-gaap_PlanNameAxis = meli_LongTermRetentionPlanTwoZeroOneOneMember	(101)us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount / us-gaap_PlanNameAxis = meli_LongTermRetentionPlanTwoZeroOneOneMember
Long Term Retention Plan 2012 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Long term retention plan	185us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount / us-gaap_PlanNameAxis = meli_LongTermRetentionPlanTwoZeroOneTwoMember	(1)us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount / us-gaap_PlanNameAxis = meli_LongTermRetentionPlanTwoZeroOneTwoMember
Long Term Retention Plan 2013 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Long term retention plan	842us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount / us-gaap_PlanNameAxis = meli_LongTermRetentionPlanTwoZeroOneThreeMember	604us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount / us-gaap_PlanNameAxis = meli_LongTermRetentionPlanTwoZeroOneThreeMember
Long Term Retention Plan 2014 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Long term retention plan	$ 1,059us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount / us-gaap_PlanNameAxis = meli_LongTermRetentionPlanTwoZeroOneFourMember	$ 798us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount / us-gaap_PlanNameAxis = meli_LongTermRetentionPlanTwoZeroOneFourMember

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- Definition

Represents the compensation cost capitalized during the period arising from equity-based compensation arrangements (for example, shares of stock, units, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(1)(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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