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v2.4.1.9

Segment Reporting and Foreign Operations - Sales by Business Segment (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 132,780 us-gaap_SalesRevenueGoodsNet | $ 128,808 us-gaap_SalesRevenueGoodsNet | $ 128,865 us-gaap_SalesRevenueGoodsNet | $ 119,236 us-gaap_SalesRevenueGoodsNet | $ 120,016 us-gaap_SalesRevenueGoodsNet | $ 115,210 us-gaap_SalesRevenueGoodsNet | $ 109,875 us-gaap_SalesRevenueGoodsNet | $ 103,948 us-gaap_SalesRevenueGoodsNet | $ 509,689 us-gaap_SalesRevenueGoodsNet | $ 449,049 us-gaap_SalesRevenueGoodsNet | $ 394,288 us-gaap_SalesRevenueGoodsNet
% Change | 14.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear |  |  |  | 14.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear |  |  |  | 14.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear | 14.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear | 10.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear
Cardiovascular Segment |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 491,706 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember | 432,124 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember | 378,493 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember
% Change | 14.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember |  |  |  | 14.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember |  |  |  | 14.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember | 14.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember | 9.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember
Cardiovascular Segment | Stand Alone Devices |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 143,712 us-gaap_SalesRevenueGoodsNet / us-gaap_ProductOrServiceAxis = mmsi_StandAloneDevicesMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember | 125,445 us-gaap_SalesRevenueGoodsNet / us-gaap_ProductOrServiceAxis = mmsi_StandAloneDevicesMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember | 114,242 us-gaap_SalesRevenueGoodsNet / us-gaap_ProductOrServiceAxis = mmsi_StandAloneDevicesMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember
% Change | 15.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_ProductOrServiceAxis = mmsi_StandAloneDevicesMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember |  |  |  | 10.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_ProductOrServiceAxis = mmsi_StandAloneDevicesMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember |  |  |  | 15.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_ProductOrServiceAxis = mmsi_StandAloneDevicesMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember | 10.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_ProductOrServiceAxis = mmsi_StandAloneDevicesMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember | 12.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_ProductOrServiceAxis = mmsi_StandAloneDevicesMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember
Cardiovascular Segment | Custom Kit And Procedures Trays |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 111,076 us-gaap_SalesRevenueGoodsNet / us-gaap_ProductOrServiceAxis = mmsi_CustomKitAndProceduresTraysMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember | 103,700 us-gaap_SalesRevenueGoodsNet / us-gaap_ProductOrServiceAxis = mmsi_CustomKitAndProceduresTraysMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember | 94,586 us-gaap_SalesRevenueGoodsNet / us-gaap_ProductOrServiceAxis = mmsi_CustomKitAndProceduresTraysMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember
% Change | 7.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_ProductOrServiceAxis = mmsi_CustomKitAndProceduresTraysMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember |  |  |  | 10.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_ProductOrServiceAxis = mmsi_CustomKitAndProceduresTraysMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember |  |  |  | 7.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_ProductOrServiceAxis = mmsi_CustomKitAndProceduresTraysMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember | 10.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_ProductOrServiceAxis = mmsi_CustomKitAndProceduresTraysMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember | 3.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_ProductOrServiceAxis = mmsi_CustomKitAndProceduresTraysMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember
Cardiovascular Segment | Inflation Devices |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 72,538 us-gaap_SalesRevenueGoodsNet / us-gaap_ProductOrServiceAxis = mmsi_InflationDevicesMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember | 66,182 us-gaap_SalesRevenueGoodsNet / us-gaap_ProductOrServiceAxis = mmsi_InflationDevicesMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember | 68,979 us-gaap_SalesRevenueGoodsNet / us-gaap_ProductOrServiceAxis = mmsi_InflationDevicesMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember
% Change | 10.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_ProductOrServiceAxis = mmsi_InflationDevicesMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember |  |  |  | (4.00%)mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_ProductOrServiceAxis = mmsi_InflationDevicesMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember |  |  |  | 10.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_ProductOrServiceAxis = mmsi_InflationDevicesMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember | (4.00%)mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_ProductOrServiceAxis = mmsi_InflationDevicesMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember | 2.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_ProductOrServiceAxis = mmsi_InflationDevicesMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember
Cardiovascular Segment | Catheters |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 87,550 us-gaap_SalesRevenueGoodsNet / us-gaap_ProductOrServiceAxis = mmsi_CathetersMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember | 75,131 us-gaap_SalesRevenueGoodsNet / us-gaap_ProductOrServiceAxis = mmsi_CathetersMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember | 64,878 us-gaap_SalesRevenueGoodsNet / us-gaap_ProductOrServiceAxis = mmsi_CathetersMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember
% Change | 17.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_ProductOrServiceAxis = mmsi_CathetersMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember |  |  |  | 16.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_ProductOrServiceAxis = mmsi_CathetersMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember |  |  |  | 17.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_ProductOrServiceAxis = mmsi_CathetersMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember | 16.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_ProductOrServiceAxis = mmsi_CathetersMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember | 17.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_ProductOrServiceAxis = mmsi_CathetersMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember
Cardiovascular Segment | Embolization Devices |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 43,855 us-gaap_SalesRevenueGoodsNet / us-gaap_ProductOrServiceAxis = mmsi_EmbolizationDevicesMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember | 33,395 us-gaap_SalesRevenueGoodsNet / us-gaap_ProductOrServiceAxis = mmsi_EmbolizationDevicesMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember | 33,870 us-gaap_SalesRevenueGoodsNet / us-gaap_ProductOrServiceAxis = mmsi_EmbolizationDevicesMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember
% Change | 31.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_ProductOrServiceAxis = mmsi_EmbolizationDevicesMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember |  |  |  | (1.00%)mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_ProductOrServiceAxis = mmsi_EmbolizationDevicesMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember |  |  |  | 31.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_ProductOrServiceAxis = mmsi_EmbolizationDevicesMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember | (1.00%)mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_ProductOrServiceAxis = mmsi_EmbolizationDevicesMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember | 8.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_ProductOrServiceAxis = mmsi_EmbolizationDevicesMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember
Cardiovascular Segment | Electrophysiology |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 32,975 us-gaap_SalesRevenueGoodsNet / us-gaap_ProductOrServiceAxis = mmsi_ElectrophysiologyMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember | 28,271 us-gaap_SalesRevenueGoodsNet / us-gaap_ProductOrServiceAxis = mmsi_ElectrophysiologyMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember | 1,938 us-gaap_SalesRevenueGoodsNet / us-gaap_ProductOrServiceAxis = mmsi_ElectrophysiologyMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember
% Change | 17.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_ProductOrServiceAxis = mmsi_ElectrophysiologyMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember |  |  |  | 1359.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_ProductOrServiceAxis = mmsi_ElectrophysiologyMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember |  |  |  | 17.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_ProductOrServiceAxis = mmsi_ElectrophysiologyMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember | 1359.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_ProductOrServiceAxis = mmsi_ElectrophysiologyMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember | 0.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_ProductOrServiceAxis = mmsi_ElectrophysiologyMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember
Endoscopy Segment |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 17,983 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = mmsi_EndoscopySegmentMember | 16,925 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = mmsi_EndoscopySegmentMember | 15,795 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = mmsi_EndoscopySegmentMember
Endoscopy Segment | Endoscopy Devices |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 17,983 us-gaap_SalesRevenueGoodsNet / us-gaap_ProductOrServiceAxis = mmsi_EndoscopyDevicesMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_EndoscopySegmentMember | $ 16,925 us-gaap_SalesRevenueGoodsNet / us-gaap_ProductOrServiceAxis = mmsi_EndoscopyDevicesMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_EndoscopySegmentMember | $ 15,795 us-gaap_SalesRevenueGoodsNet / us-gaap_ProductOrServiceAxis = mmsi_EndoscopyDevicesMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_EndoscopySegmentMember
% Change | 6.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_ProductOrServiceAxis = mmsi_EndoscopyDevicesMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_EndoscopySegmentMember |  |  |  | 7.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_ProductOrServiceAxis = mmsi_EndoscopyDevicesMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_EndoscopySegmentMember |  |  |  | 6.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_ProductOrServiceAxis = mmsi_EndoscopyDevicesMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_EndoscopySegmentMember | 7.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_ProductOrServiceAxis = mmsi_EndoscopyDevicesMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_EndoscopySegmentMember | 31.00%mmsi_SalesByBusinessSegmentChangeCurrentYearVsPriorYear / us-gaap_ProductOrServiceAxis = mmsi_EndoscopyDevicesMember / us-gaap_StatementBusinessSegmentsAxis = mmsi_EndoscopySegmentMember

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