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v2.4.1.9

Segment Reporting and Foreign Operations - Operating Income (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
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
Segment Reporting Information [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
Operating expenses |  |  |  |  |  |  |  |  | 185,056 us-gaap_OperatingExpenses | 166,523 us-gaap_OperatingExpenses | 152,351 us-gaap_OperatingExpenses
Operating income (loss) |  |  |  |  |  |  |  |  | 40,166 us-gaap_OperatingIncomeLoss | 27,844 us-gaap_OperatingIncomeLoss | 29,641 us-gaap_OperatingIncomeLoss
Total other expense - net |  |  |  |  |  |  |  |  | (8,594)us-gaap_NonoperatingIncomeExpense | (8,005)us-gaap_NonoperatingIncomeExpense | (2,023)us-gaap_NonoperatingIncomeExpense
Income tax expense | 3,680 us-gaap_IncomeTaxExpenseBenefit | 2,489 us-gaap_IncomeTaxExpenseBenefit | 1,366 us-gaap_IncomeTaxExpenseBenefit | 1,063 us-gaap_IncomeTaxExpenseBenefit | 1,642 us-gaap_IncomeTaxExpenseBenefit | 833 us-gaap_IncomeTaxExpenseBenefit | 1,253 us-gaap_IncomeTaxExpenseBenefit | (459)us-gaap_IncomeTaxExpenseBenefit | 8,598 us-gaap_IncomeTaxExpenseBenefit | 3,269 us-gaap_IncomeTaxExpenseBenefit | 7,908 us-gaap_IncomeTaxExpenseBenefit
NET INCOME |  |  |  |  |  |  |  |  | 22,974 us-gaap_ProfitLoss | 16,570 us-gaap_ProfitLoss | 19,710 us-gaap_ProfitLoss
Cardiovascular Segment |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [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
Operating expenses |  |  |  |  |  |  |  |  | 175,152 us-gaap_OperatingExpenses / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember | 157,479 us-gaap_OperatingExpenses / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember | 142,089 us-gaap_OperatingExpenses / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember
Operating income (loss) |  |  |  |  |  |  |  |  | 38,601 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember | 26,597 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember | 30,411 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = mmsi_CardiovascularSegmentMember
Endoscopy Segment |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [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
Operating expenses |  |  |  |  |  |  |  |  | 9,904 us-gaap_OperatingExpenses / us-gaap_StatementBusinessSegmentsAxis = mmsi_EndoscopySegmentMember | 9,044 us-gaap_OperatingExpenses / us-gaap_StatementBusinessSegmentsAxis = mmsi_EndoscopySegmentMember | 10,262 us-gaap_OperatingExpenses / us-gaap_StatementBusinessSegmentsAxis = mmsi_EndoscopySegmentMember
Operating income (loss) |  |  |  |  |  |  |  |  | $ 1,565 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = mmsi_EndoscopySegmentMember | $ 1,247 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = mmsi_EndoscopySegmentMember | $ (770)us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = mmsi_EndoscopySegmentMember

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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Income Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=6515339 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 + Details
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