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ACQUISITIONS AND PRO FORMA RESULTS (Roll Forward of Contingent Consideration Liability for Purchase of Tarsus Medical) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Jan. 15, 2014 | Dec. 05, 2014
Business Acquisition, Contingent Consideration [Roll Forward] |  |  |  |
Beginning of Period |  | $ 1,227 us-gaap_BusinessCombinationContingentConsiderationLiability |  |
Additions during period | 22,008 us-gaap_BusinessCombinationContingentConsiderationLiability | 1,227 us-gaap_BusinessCombinationContingentConsiderationLiability |  |
Ending of Period | 22,008 us-gaap_BusinessCombinationContingentConsiderationLiability | 1,227 us-gaap_BusinessCombinationContingentConsiderationLiability |  |
Confluent Surgical, Inc. |  |  |  |
Business Acquisition, Contingent Consideration [Roll Forward] |  |  |  |
Beginning of Period |  |  | 20,895 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_BusinessAcquisitionAxis = iart_ConfluentSurgicalInc.Member |
Additions during period |  |  | 20,895 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_BusinessAcquisitionAxis = iart_ConfluentSurgicalInc.Member |
Ending of Period |  |  | 20,895 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_BusinessAcquisitionAxis = iart_ConfluentSurgicalInc.Member |
Metasurg |  |  |  |
Business Acquisition, Contingent Consideration [Roll Forward] |  |  |  |
Beginning of Period |  |  |  | 650 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_BusinessAcquisitionAxis = iart_MetasurgMember
Additions during period |  |  |  | 650 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_BusinessAcquisitionAxis = iart_MetasurgMember
Ending of Period |  |  |  | 650 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_BusinessAcquisitionAxis = iart_MetasurgMember
Selling, General and Administrative Expenses |  |  |  |
Business Acquisition, Contingent Consideration [Roll Forward] |  |  |  |
(Gain)/Loss from decrease in fair value of contingent consideration liability | $ (764)us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 / us-gaap_IncomeStatementLocationAxis = us-gaap_SellingGeneralAndAdministrativeExpensesMember |  |  |

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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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