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Organization and Summary of Significant Accounting Policies - Other Assets (Details)	Dec. 31, 2013 investment
Accounting Policies [Abstract]
Other Assets, Deferred Compensation Plan, Number of Investments, Cost Method	2

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- Definition

Other Assets, Deferred Compensation Plan, Number of Investments, Cost Method

+ References

No definition available.

+ Details

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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