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Goodwill and Other Intangible Assets (Other Intangible Assets) (Details) (USD $) In Millions, unless otherwise specified | 0 Months Ended | 3 Months Ended | 0 Months Ended |
--- | --- | --- | --- | ---
Jan. 03, 2012 | Mar. 31, 2015 | Mar. 31, 2014 | Jan. 03, 2013 | Jan. 03, 2014 | Jan. 05, 2015 | Oct. 17, 2014 | Apr. 13, 2015 | Jul. 30, 2014
Other Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |
Up-front payment | $ 63.0 cnmd_JointDevelopmentAndDistributionAgreementUpFrontPayment |  |  |  |  |  |  |  |
Additional contingent cash payment | 84.0 cnmd_JointDevelopmentAndDistributionAgreementConditionalPaymentAmount |  |  |  |  |  |  |  |
Contingent payment period | 4 years |  |  |  |  |  |  |  |
Amortization expense |  | 3.2 us-gaap_AmortizationOfIntangibleAssets | 3.3 us-gaap_AmortizationOfIntangibleAssets |  |  |  |  |  |
Weighted average amortization period (in years) |  | 27 years |  |  |  |  |  |  |
Customer Relationships [Member] |  |  |  |  |  |  |  |  |
Other Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |
Weighted average amortization period (in years) |  | 33 years |  |  |  |  |  |  |
Promotional, Marketing and Distribution Rights [Member] |  |  |  |  |  |  |  |  |
Other Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |
Weighted average amortization period (in years) |  | 25 years |  |  |  |  |  |  |
Patents and Other Intangible Assets [Member] |  |  |  |  |  |  |  |  |
Other Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |
Weighted average amortization period (in years) |  | 14 years |  |  |  |  |  |  |
After One Year of Meeting Supply Target [Member] |  |  |  |  |  |  |  |  |
Other Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |
Conditional payment, amount paid |  |  |  | 34.0 cnmd_JointDevelopmentAndDistributionAgreementConditionalPaymentAmountPaid / cnmd_SupplyTargetAxis = cnmd_AfterOneYearOfMeetingSupplyTargetMember |  |  |  |  |
After Two Year of Meeting Supply Target [Member] |  |  |  |  |  |  |  |  |
Other Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |
Conditional payment, amount paid |  |  |  |  | 16.7 cnmd_JointDevelopmentAndDistributionAgreementConditionalPaymentAmountPaid / cnmd_SupplyTargetAxis = cnmd_AfterTwoYearofMeetingSupplyTargetMember |  |  |  |
After Year Three of Meeting Supply Target [Member] |  |  |  |  |  |  |  |  |
Other Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |
Conditional payment, amount paid |  |  |  |  |  | 16.7 cnmd_JointDevelopmentAndDistributionAgreementConditionalPaymentAmountPaid / cnmd_SupplyTargetAxis = cnmd_AfterYearThreeofMeetingSupplyTargetMember |  |  |
After Year Four of Meeting Supply Target [Member] |  |  |  |  |  |  |  |  |
Other Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |
Additional contingent cash payment |  | 16.7 cnmd_JointDevelopmentAndDistributionAgreementConditionalPaymentAmount / cnmd_SupplyTargetAxis = cnmd_AfterYearFourofMeetingSupplyTargetMember |  |  |  |  |  |  |
EndoDynamix, Inc. [Member] |  |  |  |  |  |  |  |  |
Other Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |
Contractual obligations for acquisitions of a business |  | 10.2 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_BusinessAcquisitionAxis = cnmd_EndoDynamixInc.Member |  |  |  |  |  |  | 13.9 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_BusinessAcquisitionAxis = cnmd_EndoDynamixInc.Member
Milestone based payments | EndoDynamix, Inc. [Member] |  |  |  |  |  |  |  |  |
Other Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |
Contractual obligations for acquisitions of a business |  |  |  |  |  |  |  |  | 10.3 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_BusinessAcquisitionAxis = cnmd_EndoDynamixInc.Member / us-gaap_ContingentConsiderationByTypeAxis = cnmd_MilestoneBasedPaymentObligationMember
Decrease in contingent liability |  |  |  |  |  |  | 3.7 us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 / us-gaap_BusinessAcquisitionAxis = cnmd_EndoDynamixInc.Member / us-gaap_ContingentConsiderationByTypeAxis = cnmd_MilestoneBasedPaymentObligationMember |  |
Royalty Agreements [Member] | EndoDynamix, Inc. [Member] |  |  |  |  |  |  |  |  |
Other Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |
Contractual obligations for acquisitions of a business |  |  |  |  |  |  |  |  | 3.6 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_BusinessAcquisitionAxis = cnmd_EndoDynamixInc.Member / us-gaap_ContingentConsiderationByTypeAxis = us-gaap_RoyaltyAgreementsMember
Subsequent Event [Member] | Milestone based payments | EndoDynamix, Inc. [Member] |  |  |  |  |  |  |  |  |
Other Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |
Decrease in contingent liability |  |  |  |  |  |  |  | $ 2.4 us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 / us-gaap_BusinessAcquisitionAxis = cnmd_EndoDynamixInc.Member / us-gaap_ContingentConsiderationByTypeAxis = cnmd_MilestoneBasedPaymentObligationMember / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember |

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- Definition Joint Development and Distribution Agreement, Conditional Payment Amount + References No definition available. + Details
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- Definition Joint Development and Distribution Agreement, Conditional Payment, Amount Paid + References No definition available. + Details
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- Definition Joint Development and Distribution Agreement, Conditional Payment Period + References No definition available. + Details
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- Definition The cash outflow related to the up front payment for the rights and certain assets under the joint development and distribution agreement. + References No definition available. + Details
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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 + Details
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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7008-128479 + Details
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- Definition Amount of liability recognized arising from contingent consideration in a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 35 -Paragraph 1 -Subparagraph b -URI http://asc.fasb.org/extlink&oid=6911338&loc=d3e6819-128478 + Details
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