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Commitments and Contingencies (Details) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Other Commitments [Line Items] |  |  |  |
Operating Leases, Rent Expense |  | $ 8,100,000 us-gaap_LeaseAndRentalExpense | $ 5,500,000 us-gaap_LeaseAndRentalExpense | $ 4,800,000 us-gaap_LeaseAndRentalExpense
Proceeds from sale-leaseback transactions | 24,000,000 us-gaap_SaleLeasebackTransactionGrossProceedsInvestingActivities | 5,521,000 us-gaap_SaleLeasebackTransactionGrossProceedsInvestingActivities | 24,000,000 us-gaap_SaleLeasebackTransactionGrossProceedsInvestingActivities | 0 us-gaap_SaleLeasebackTransactionGrossProceedsInvestingActivities
Lessee Leasing Arrangements, Operating Leases, Term of Contract | 19 years 10 months | 7 years |  |
Irish Grants Related to Research and Development, Training and Hiring |  | 0 mmsi_GrantsRelatedtoResearchandDevelopmentTrainingandHiring | 1,200,000 mmsi_GrantsRelatedtoResearchandDevelopmentTrainingandHiring | 424,000 mmsi_GrantsRelatedtoResearchandDevelopmentTrainingandHiring
Deferred Credits and Other Liabilities | 3,100,000 us-gaap_DeferredCreditsAndOtherLiabilities | 2,900,000 us-gaap_DeferredCreditsAndOtherLiabilities | 3,100,000 us-gaap_DeferredCreditsAndOtherLiabilities |
Irish Grants Related to Purchased Property Plant and Equipment |  | 175,000 mmsi_IrishGrantsRelatedToPurchasedPropertyPlantAndEquipment | 139,000 mmsi_IrishGrantsRelatedToPurchasedPropertyPlantAndEquipment | 174,000 mmsi_IrishGrantsRelatedToPurchasedPropertyPlantAndEquipment
Refundable Irish Grants if Operations Cease |  | $ 4,400,000 mmsi_RefundableIrishGrantsIfOperationsCease |  |
Remaining grant liability period |  | 4 years |  |
Minimum |  |  |  |
Other Commitments [Line Items] |  |  |  |
Grant liability period |  | 5 years |  |
Maximum |  |  |  |
Other Commitments [Line Items] |  |  |  |
Grant liability period |  | 8 years |  |

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- Definition Irish Government Grants related to research and development, training and hiring. + References No definition available. + Details
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- Definition Irish Grants Related to Purchased Property Plant and Equipement + References No definition available. + Details
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- Definition Other Commitment, Foreign Government, Grant Liability Period + References No definition available. + Details
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- Definition Refundable Irish Grants if Operations Cease + References No definition available. + Details
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- Definition Total carrying amount as of the balance sheet date of unearned revenue or income, not otherwise specified in the taxonomy, which is expected to be taken into income in future periods and obligations not separately disclosed in the balance sheet (other liabilities). + References No definition available. + Details
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- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
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- Definition Term of the lessee's leasing arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Details
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- Definition Amount of cash inflow before closing and deferred financing costs received by a seller-lessee in a sale-leaseback recognized in investing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 55 -Paragraph 51 -URI http://asc.fasb.org/extlink&oid=28365400&loc=d3e51840-112757 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 55 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=28365400&loc=d3e51831-112757 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 40 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=28365400&loc=d3e51843-112757 + Details
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