XML 101 R71.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Revolving Credit Facility and Long-Term Debt - Financial Covenants (Details) - Credit Agreement $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 USD ($)
Debt Instrument [Line Items] |
Consolidated Total Leverage Ratio | 4.0
Consolidated Interest Coverage Ratio | 3.0
Facility Capital Expenditures | $ 50

X
- Definition Line of Credit Facility, Covenant Terms, Facility Capital Expenditures, Next Twelve Months, Maximum + References No definition available. + Details
Name: | mmsi_LineOfCreditFacilityCovenantTermsFacilityCapitalExpendituresNextTwelveMonthsMaximum
Namespace Prefix: | mmsi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line of Credit Facility, Covenant Terms, Consolidated Ebitda To Fixed Charges Ratio, Minimum2 + References No definition available. + Details
Name: | mmsi_LineofCreditFacilityCovenantTermsConsolidatedEbitdaToFixedChargesRatioMinimum2
Namespace Prefix: | mmsi_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line of Credit Facility, Covenant Terms, Consolidated Total Leverage Ratio, Maximum + References No definition available. + Details
Name: | mmsi_LineofCreditFacilityCovenantTermsConsolidatedTotalLeverageRatioMaximum
Namespace Prefix: | mmsi_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DebtInstrumentAxis=mmsi_CreditAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |