XML 75 R90.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Employee Benefit Plans (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Defined Contribution Plan Disclosure [Line Items] |  |  |
Minimum age for participation (in years) | 18 years |  |
Minimum time at the company for participation (in days) | 90 days |  |
Total paid into 401(k) | $ 3.1 | $ 3.5 | $ 2.4
Foreign Plan |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Total paid into 401(k) | $ 3.5 | $ 3.0 | $ 2.3
Foreign Plan | Minimum |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Employer matching, percent of gross pay | 2.00% |  |
Foreign Plan | Maximum |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Employer matching, percent of gross pay | 32.00% |  |
Foreign Plan | Management | Minimum |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Employer matching, percent of gross pay | 2.00% |  |
Foreign Plan | Management | Maximum |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Employer matching, percent of gross pay | 32.00% |  |

X
- Definition US Full Time Employees Minimum Years Of Age + References No definition available. + Details
Name: | mmsi_DefinedContributionPlanMinimumAgeRequirement
Namespace Prefix: | mmsi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The Plan has a 90 day minimum service requirement + References No definition available. + Details
Name: | mmsi_DefinedContributionPlanMinimumServiceRequirement
Namespace Prefix: | mmsi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of cost for defined contribution plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
Name: | us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_DefinedContributionPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RetirementPlanSponsorLocationAxis=us-gaap_ForeignPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_TitleOfIndividualAxis=srt_ManagementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |