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v2.4.1.9

Segment Reporting and Foreign Operations - Foreign Sales (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Segment Reporting Information [Line Items] |  |  |
Foreign Sales Percent of Total Sales | 39.00%mmsi_ForeignSalesPercentOfTotalSales | 37.00%mmsi_ForeignSalesPercentOfTotalSales | 37.00%mmsi_ForeignSalesPercentOfTotalSales
Foreign Sales |  |  |
Segment Reporting Information [Line Items] |  |  |
Revenue, Net | $ 198.3 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = mmsi_ForeignSalesMember | $ 165.8 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = mmsi_ForeignSalesMember | $ 146.3 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = mmsi_ForeignSalesMember

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- Definition Foreign Sales Percent of Total Sales + References No definition available. + Details
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Namespace Prefix: | mmsi_
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Balance Type: | na
Period Type: | instant

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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
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Data Type: | xbrli:stringItemType
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Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |