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Cash Dividend Distribution (Additional Information) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 0 Months Ended | 1 Months Ended | 3 Months Ended | 12 Months Ended
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Feb. 24, 2015 | Oct. 31, 2014 | Jul. 31, 2014 | Apr. 30, 2014 | Feb. 28, 2014 | Mar. 31, 2015 | Mar. 31, 2014 | Dec. 31, 2014
Dividends Payable [Line Items] |  |  |  |  |  |  |  |
Cash dividend distribution | $ 4,548 meli_CashDividendDistribution | $ 7,330 meli_CashDividendDistribution | $ 7,330 meli_CashDividendDistribution | $ 7,330 meli_CashDividendDistribution | $ 7,330 meli_CashDividendDistribution |  |  | $ 29,318 meli_CashDividendDistribution
Cash dividend distribution, per share | $ 0.103 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.166 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.166 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.166 us-gaap_CommonStockDividendsPerShareCashPaid | $ 0.166 us-gaap_CommonStockDividendsPerShareCashPaid |  |  | $ 0.664 us-gaap_CommonStockDividendsPerShareCashPaid
Cash dividend declared, per share |  |  |  |  |  | $ 0.103 us-gaap_CommonStockDividendsPerShareDeclared | $ 0.166 us-gaap_CommonStockDividendsPerShareDeclared |
First Quarter Previous Year [Member] |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |
Dividend payable date |  |  |  |  |  | Apr. 15, 2015 |  |
Dividends payment, date of record |  |  |  |  |  | Mar. 29, 2015 |  |
Second Quarter Previous Year [Member] |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |
Dividend payable date |  |  |  |  |  | Jul. 15, 2015 |  |
Dividends payment, date of record |  |  |  |  |  | Jun. 30, 2015 |  |
Third Quarter Previous Year [Member] |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |
Dividend payable date |  |  |  |  |  | Oct. 15, 2014 |  |
Dividends payment, date of record |  |  |  |  |  | Sep. 30, 2015 |  |
Fourth Quarter Previous Year [Member] |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |
Dividend payable date |  |  |  |  |  | Jan. 15, 2015 |  |
Dividends payment, date of record |  |  |  |  |  | Dec. 31, 2014 |  |
Fourth Quarter [Member] |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |
Dividend payable date |  |  |  |  |  | Jan. 15, 2015 |  |
Dividends payment, date of record |  |  |  |  |  | Dec. 31, 2014 |  |
First Quarter [Member] |  |  |  |  |  |  |  |
Dividends Payable [Line Items] |  |  |  |  |  |  |  |
Dividend payable date |  |  |  |  |  | Apr. 15, 2015 |  |
Dividends payment, date of record |  |  |  |  |  | Mar. 31, 2015 |  |

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- Definition Aggregate dividends paid during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Definition Date the declared dividend will be paid, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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