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Business Combinations, Goodwill and Intangible Assets (Additional Information) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 0 Months Ended |
--- | --- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Apr. 08, 2014 | Dec. 15, 2014 | Dec. 31, 2014
Business Acquisition [Line Items] |  |  |  |  |
Fair value of contingent consideration | $ 4,875 us-gaap_BusinessCombinationContingentConsiderationAsset |  |  |  | $ 4,833 us-gaap_BusinessCombinationContingentConsiderationAsset
Amount of Trademarks, customer lists, software and non-solicitation agreements | 22,801 us-gaap_IntangibleAssetsNetExcludingGoodwill |  |  |  | 23,171 us-gaap_IntangibleAssetsNetExcludingGoodwill
Total aggregate amortization expense for intangible assets | 510 us-gaap_AmortizationOfIntangibleAssets | 159 us-gaap_AmortizationOfIntangibleAssets |  |  |
Online Classifieds Advertisement Companies in Chile and Mexico [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Percentage of acquisition |  |  | 100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = meli_OnlineClassifiedsAdvertisementCompaniesInChileAndMexicoMember |  |
Total purchase price |  |  | 37,990 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet / us-gaap_BusinessAcquisitionAxis = meli_OnlineClassifiedsAdvertisementCompaniesInChileAndMexicoMember |  |
Business acquisition, cash paid |  |  | 32,148 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = meli_OnlineClassifiedsAdvertisementCompaniesInChileAndMexicoMember |  |
Cash held in escrows |  |  | 1,000 meli_CashHeldInEscrows / us-gaap_BusinessAcquisitionAxis = meli_OnlineClassifiedsAdvertisementCompaniesInChileAndMexicoMember |  |
Additional cash considerations in escrows |  |  | 4,621 meli_BusinessAcquisitionCashWithheldAsIndemnification / us-gaap_BusinessAcquisitionAxis = meli_OnlineClassifiedsAdvertisementCompaniesInChileAndMexicoMember |  |
Additional price adjustment escrow |  |  | 221 meli_AdditionalEscrowAccount / us-gaap_BusinessAcquisitionAxis = meli_OnlineClassifiedsAdvertisementCompaniesInChileAndMexicoMember |  |
Amount of Trademarks, customer lists, software and non-solicitation agreements |  |  | 19,036 us-gaap_IntangibleAssetsNetExcludingGoodwill / us-gaap_BusinessAcquisitionAxis = meli_OnlineClassifiedsAdvertisementCompaniesInChileAndMexicoMember |  |
Online Classifieds Advertisement Companies in Chile and Mexico [Member] | Customer Lists [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Intangible assets amortized period |  |  | 10 years |  |
Online Classifieds Advertisement Companies in Chile and Mexico [Member] | Non Solicitation Agreement [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Intangible assets amortized period |  |  | 4 years |  |
Online Classifieds Advertisement Companies in Chile and Mexico [Member] | Software [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Intangible assets amortized period |  |  | 3 years |  |
Business Vision S.A. [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Percentage of acquisition |  |  |  | 100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = meli_BusinessVisionS.a.Member |
Total purchase price |  |  |  | 4,768 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet / us-gaap_BusinessAcquisitionAxis = meli_BusinessVisionS.a.Member |
Business acquisition, cash paid |  |  |  | 3,804 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = meli_BusinessVisionS.a.Member |
Business combination net of negative working capital adjustments amount |  |  |  | 111 meli_BusinessCombinationNetOfNegativeWorkingCapitalAdjustmentsAmount / us-gaap_BusinessAcquisitionAxis = meli_BusinessVisionS.a.Member |
Business Vision S.A. [Member] | 24-Months Period [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Escrow amount covering unexpected adjustments to initial aggregate purchase price |  |  |  | 250 meli_BusinessCombinationEscrowDepositsToCoverUnexpectedAdjustmentsToInitialAggregatePurchasePrice / us-gaap_BusinessAcquisitionAxis = meli_BusinessVisionS.a.Member / us-gaap_StatementScenarioAxis = meli_TwentyFourMonthsPeriodMember |
Percentage of amount in escrow account |  |  |  | 50.00%meli_BusinessCombinationEscrowDepositsAmountsInPercentage / us-gaap_BusinessAcquisitionAxis = meli_BusinessVisionS.a.Member / us-gaap_StatementScenarioAxis = meli_TwentyFourMonthsPeriodMember |
Business Vision S.A. [Member] | 12-Months Period [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Percentage of amount in escrow account |  |  |  | 50.00%meli_BusinessCombinationEscrowDepositsAmountsInPercentage / us-gaap_BusinessAcquisitionAxis = meli_BusinessVisionS.a.Member / us-gaap_StatementScenarioAxis = meli_TwelveMonthsPeriodMember |
Business Vision S.A. [Member] | 12-Months Period and 24-Months Period [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Amount in escrow account |  |  |  | $ 735 us-gaap_EscrowDeposit / us-gaap_BusinessAcquisitionAxis = meli_BusinessVisionS.a.Member / us-gaap_StatementScenarioAxis = meli_TwelveMonthsPeriodAndTwentyFourMonthsPeriodMember |

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- Definition Additional Escrow Account + References No definition available. + Details
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- Definition Business Acquisition Cash Withheld As Indemnification. + References No definition available. + Details
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- Definition Business Combination Escrow Deposits Amounts In Percentage + References No definition available. + Details
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- Definition Business combination escrow deposits to cover unexpected adjustments to initial aggregate purchase price. + References No definition available. + Details
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- Definition Business combination net of negative working capital adjustments amount. + References No definition available. + Details
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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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- Definition Amount of asset recognized arising from contingent consideration in a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 35 -Paragraph 1 -Subparagraph b -URI http://asc.fasb.org/extlink&oid=6911338&loc=d3e6819-128478 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6411-128476 + Details
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- Definition Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472 + Details
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- Definition The designation of funds furnished by a borrower to a lender to assure future payments of the borrower's real estate taxes and insurance obligations with respect to a mortgaged property. Escrow deposits may be made for a variety of other purposes such as earnest money and contingent payments. This element excludes replacement reserves which are an escrow separately provided for within the US GAAP taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.10) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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