Interim Financial Information (Details) (Reclassification Adjustment [Member], USD $) In Millions, unless otherwise specified	Dec. 31, 2012
Reclassification Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification of promotional, marketing and distribution rights	$ 143.6

Reclassification of Prior Year Assets, Promotional, Marketing and Distribution Rights

No definition available.

Name:	cnmd_ReclassificationofPriorYearAssetsPromotionalMarketingandDistributionRights
Namespace Prefix:	cnmd_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant