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ACQUISITIONS AND PRO FORMA RESULTS (Narrative) (Details) (USD $) | 12 Months Ended | 0 Months Ended | 3 Months Ended | 0 Months Ended | 3 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 05, 2014 | Oct. 27, 2014 | Jan. 15, 2014 | Sep. 30, 2014 intangible_asset | Jan. 24, 2013 | Jun. 30, 2014
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Additions during period | $ 22,008,000 us-gaap_BusinessCombinationContingentConsiderationLiability | $ 1,227,000 us-gaap_BusinessCombinationContingentConsiderationLiability |  |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired | 320,921,000 us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired | 2,980,000 us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired | 7,278,000 us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired |  |  |  |  |  |
Metasurg |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Consideration Transferred |  |  |  | 27,200,000 us-gaap_BusinessCombinationConsiderationTransferred1 / us-gaap_BusinessAcquisitionAxis = iart_MetasurgMember |  |  |  |  |
Payments to Acquire Business |  |  |  | 26,500,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = iart_MetasurgMember |  |  |  |  |
Additions during period |  |  |  | 650,000 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_BusinessAcquisitionAxis = iart_MetasurgMember |  |  |  |  |
Contingent Consideration Arrangements, Maximum Payout |  |  |  | 38,500,000 us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh / us-gaap_BusinessAcquisitionAxis = iart_MetasurgMember |  |  |  |  |
Discount Rate |  |  |  | 19.90%us-gaap_FairValueInputsDiscountRate / us-gaap_BusinessAcquisitionAxis = iart_MetasurgMember |  |  |  |  |
Net assets acquired | 27,150,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet / us-gaap_BusinessAcquisitionAxis = iart_MetasurgMember |  |  |  |  |  |  |  |
Medtronic MicroFrance |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Payments to Acquire Business |  |  |  |  | 61,600,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = iart_MedtronicMicroFranceMember |  |  |  |
Net assets acquired | 61,615,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet / us-gaap_BusinessAcquisitionAxis = iart_MedtronicMicroFranceMember |  |  |  |  |  |  |  |
Confluent Surgical, Inc. |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Additions during period |  |  |  |  |  | 20,895,000 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_BusinessAcquisitionAxis = iart_ConfluentSurgicalInc.Member |  |  |
Contingent Consideration Arrangements, Maximum Payout |  |  |  |  |  | 30,000,000 us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh / us-gaap_BusinessAcquisitionAxis = iart_ConfluentSurgicalInc.Member |  |  |
Discount Rate |  |  |  |  |  | 2.20%us-gaap_FairValueInputsDiscountRate / us-gaap_BusinessAcquisitionAxis = iart_ConfluentSurgicalInc.Member |  |  |
Net assets acquired |  |  |  |  |  | 255,895,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet / us-gaap_BusinessAcquisitionAxis = iart_ConfluentSurgicalInc.Member |  |  |
Payment for Business Interest |  |  |  |  |  | 231,000,000 iart_PaymentstoAcquireBusinessesPaymentforBusinessInterest / us-gaap_BusinessAcquisitionAxis = iart_ConfluentSurgicalInc.Member |  |  |
Payments for Transitional Supply Agreement |  |  |  |  |  | 4,000,000 iart_PaymentstoAcquireBusinessesPaymentsforTransitionalSupplyAgreement / us-gaap_BusinessAcquisitionAxis = iart_ConfluentSurgicalInc.Member |  |  |
Arrangement Extension Period |  |  |  |  |  | 2 years |  |  |
Required Number of Days for Extension |  |  |  |  |  | 180 days |  |  |
Period of Contingent Consideration Arrangement |  |  |  |  |  | 5 years |  |  |
Period of Transitional Supply Price Increases |  |  |  |  |  | 3 years |  |  |
Revenue Since Acquisition Date | 69,000,000 us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual / us-gaap_BusinessAcquisitionAxis = iart_ConfluentSurgicalInc.Member |  |  |  |  |  |  |  |
Number of Assets Impaired |  |  |  |  |  |  | 1 iart_ImpairmentofIntangibleAssetsFinitelivedNumberofAssetsImpaired / us-gaap_BusinessAcquisitionAxis = iart_ConfluentSurgicalInc.Member |  |
Impairment of Finite-lived Assets |  |  |  |  |  |  | 600,000 us-gaap_ImpairmentOfIntangibleAssetsFinitelived / us-gaap_BusinessAcquisitionAxis = iart_ConfluentSurgicalInc.Member |  |
Probability of Event |  |  |  |  |  | 95.00%iart_FairValueInputProbabilityofEvent / us-gaap_BusinessAcquisitionAxis = iart_ConfluentSurgicalInc.Member |  |  |
Incremental Increase in Liability |  |  |  |  |  | 300,000 iart_BusinessCombinationContingentConsiderationArrangementsRangeofOutcomesValueIncrementalIncreaseinLiability / us-gaap_BusinessAcquisitionAxis = iart_ConfluentSurgicalInc.Member |  |  |
Incremental Decrease in Liability |  |  |  |  |  | 400,000 iart_BusinessCombinationContingentConsiderationArrangementsRangeofOutcomesValueIncrementalDecreaseinLiability / us-gaap_BusinessAcquisitionAxis = iart_ConfluentSurgicalInc.Member |  |  |
Tarsus Medical, Inc. |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Payments to Acquire Business |  |  |  |  |  |  |  | 4,700,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = iart_TarsusMedicalIncMember |
Additions during period |  |  |  |  |  |  |  | 1,600,000 us-gaap_BusinessCombinationContingentConsiderationLiability / us-gaap_BusinessAcquisitionAxis = iart_TarsusMedicalIncMember |
Contingent Consideration Arrangements, Maximum Payout |  |  |  |  |  |  |  | 11,500,000 us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh / us-gaap_BusinessAcquisitionAxis = iart_TarsusMedicalIncMember |
Net assets acquired |  |  |  |  |  |  |  | 4,665,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet / us-gaap_BusinessAcquisitionAxis = iart_TarsusMedicalIncMember |
Payments to Acquire Businesses, Net of Cash Acquired |  |  |  |  |  |  |  | 3,100,000 us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired / us-gaap_BusinessAcquisitionAxis = iart_TarsusMedicalIncMember |
Adjustment on Consideration Transferred |  |  |  |  |  |  |  | 200,000 us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred / us-gaap_BusinessAcquisitionAxis = iart_TarsusMedicalIncMember |
Contingent Consideration, Low Estimate |  |  |  |  |  |  |  | 1,500,000 us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueLow / us-gaap_BusinessAcquisitionAxis = iart_TarsusMedicalIncMember |
Cash Consideration One | Confluent Surgical, Inc. |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Contingent Consideration Arrangements, Maximum Payout |  |  |  |  |  | 25,000,000 us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh / us-gaap_BusinessAcquisitionAxis = iart_ConfluentSurgicalInc.Member / us-gaap_ContingentConsiderationByTypeAxis = iart_CashConsiderationOneMember |  |  |
Cash Consideration One | Tarsus Medical, Inc. |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Discount Rate |  |  |  |  |  |  |  | 4.30%us-gaap_FairValueInputsDiscountRate / us-gaap_BusinessAcquisitionAxis = iart_TarsusMedicalIncMember / us-gaap_ContingentConsiderationByTypeAxis = iart_CashConsiderationOneMember |
Cash Consideration Two | Confluent Surgical, Inc. |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Contingent Consideration Arrangements, Maximum Payout |  |  |  |  |  | 5,000,000 us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh / us-gaap_BusinessAcquisitionAxis = iart_ConfluentSurgicalInc.Member / us-gaap_ContingentConsiderationByTypeAxis = iart_CashConsiderationTwoMember |  |  |
Cash Consideration Two | Tarsus Medical, Inc. |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Discount Rate |  |  |  |  |  |  |  | 16.50%us-gaap_FairValueInputsDiscountRate / us-gaap_BusinessAcquisitionAxis = iart_TarsusMedicalIncMember / us-gaap_ContingentConsiderationByTypeAxis = iart_CashConsiderationTwoMember |
Deferred Tax Liability | Confluent Surgical, Inc. |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |
Goodwill Adjustments |  |  |  |  |  |  |  |  | $ 12,400,000 us-gaap_GoodwillPurchaseAccountingAdjustments / us-gaap_BalanceSheetLocationAxis = iart_DeferredTaxLiabilityMember / us-gaap_BusinessAcquisitionAxis = iart_ConfluentSurgicalInc.Member

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