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Organization and Summary of Significant Accounting Policies - Other Assets (Details) | Dec. 31, 2014 investment
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Accounting Policies [Abstract] |
Other Assets, Deferred Compensation Plan, Number of Investments, Cost Method | 2 mmsi_OtherAssetsDeferredCompensationPlanNumberofInvestmentsCostMethod

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- Definition Other Assets, Deferred Compensation Plan, Number of Investments, Cost Method + References No definition available. + Details
Name: | mmsi_OtherAssetsDeferredCompensationPlanNumberofInvestmentsCostMethod
Namespace Prefix: | mmsi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration