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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
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 $ 22,008,000us-gaap_BusinessCombinationContingentConsiderationLiability $ 1,227,000us-gaap_BusinessCombinationContingentConsiderationLiability              
Payments to Acquire Businesses, Net of Cash Acquired 320,921,000us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired 2,980,000us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired 7,278,000us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired            
Metasurg                  
Business Acquisition [Line Items]                  
Consideration Transferred       27,200,000us-gaap_BusinessCombinationConsiderationTransferred1
/ us-gaap_BusinessAcquisitionAxis
= iart_MetasurgMember
         
Payments to Acquire Business       26,500,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= iart_MetasurgMember
         
Additions during period       650,000us-gaap_BusinessCombinationContingentConsiderationLiability
/ us-gaap_BusinessAcquisitionAxis
= iart_MetasurgMember
         
Contingent Consideration Arrangements, Maximum Payout       38,500,000us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh
/ us-gaap_BusinessAcquisitionAxis
= iart_MetasurgMember
         
Discount Rate       19.90%us-gaap_FairValueInputsDiscountRate
/ us-gaap_BusinessAcquisitionAxis
= iart_MetasurgMember
         
Net assets acquired 27,150,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= iart_MetasurgMember
               
Medtronic MicroFrance                  
Business Acquisition [Line Items]                  
Payments to Acquire Business         61,600,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= iart_MedtronicMicroFranceMember
       
Net assets acquired 61,615,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= iart_MedtronicMicroFranceMember
               
Confluent Surgical, Inc.                  
Business Acquisition [Line Items]                  
Additions during period           20,895,000us-gaap_BusinessCombinationContingentConsiderationLiability
/ us-gaap_BusinessAcquisitionAxis
= iart_ConfluentSurgicalInc.Member
     
Contingent Consideration Arrangements, Maximum Payout           30,000,000us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh
/ us-gaap_BusinessAcquisitionAxis
= iart_ConfluentSurgicalInc.Member
     
Discount Rate           2.20%us-gaap_FairValueInputsDiscountRate
/ us-gaap_BusinessAcquisitionAxis
= iart_ConfluentSurgicalInc.Member
     
Net assets acquired           255,895,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= iart_ConfluentSurgicalInc.Member
     
Payment for Business Interest           231,000,000iart_PaymentstoAcquireBusinessesPaymentforBusinessInterest
/ us-gaap_BusinessAcquisitionAxis
= iart_ConfluentSurgicalInc.Member
     
Payments for Transitional Supply Agreement           4,000,000iart_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 69,000,000us-gaap_BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual
/ us-gaap_BusinessAcquisitionAxis
= iart_ConfluentSurgicalInc.Member
               
Number of Assets Impaired             1iart_ImpairmentofIntangibleAssetsFinitelivedNumberofAssetsImpaired
/ us-gaap_BusinessAcquisitionAxis
= iart_ConfluentSurgicalInc.Member
   
Impairment of Finite-lived Assets             600,000us-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           300,000iart_BusinessCombinationContingentConsiderationArrangementsRangeofOutcomesValueIncrementalIncreaseinLiability
/ us-gaap_BusinessAcquisitionAxis
= iart_ConfluentSurgicalInc.Member
     
Incremental Decrease in Liability           400,000iart_BusinessCombinationContingentConsiderationArrangementsRangeofOutcomesValueIncrementalDecreaseinLiability
/ us-gaap_BusinessAcquisitionAxis
= iart_ConfluentSurgicalInc.Member
     
Tarsus Medical, Inc.                  
Business Acquisition [Line Items]                  
Payments to Acquire Business               4,700,000us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= iart_TarsusMedicalIncMember
 
Additions during period               1,600,000us-gaap_BusinessCombinationContingentConsiderationLiability
/ us-gaap_BusinessAcquisitionAxis
= iart_TarsusMedicalIncMember
 
Contingent Consideration Arrangements, Maximum Payout               11,500,000us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh
/ us-gaap_BusinessAcquisitionAxis
= iart_TarsusMedicalIncMember
 
Net assets acquired               4,665,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= iart_TarsusMedicalIncMember
 
Payments to Acquire Businesses, Net of Cash Acquired               3,100,000us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
/ us-gaap_BusinessAcquisitionAxis
= iart_TarsusMedicalIncMember
 
Adjustment on Consideration Transferred               200,000us-gaap_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred
/ us-gaap_BusinessAcquisitionAxis
= iart_TarsusMedicalIncMember
 
Contingent Consideration, Low Estimate               1,500,000us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueLow
/ us-gaap_BusinessAcquisitionAxis
= iart_TarsusMedicalIncMember
 
Cash Consideration One | Confluent Surgical, Inc.                  
Business Acquisition [Line Items]                  
Contingent Consideration Arrangements, Maximum Payout           25,000,000us-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           5,000,000us-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                 $ 12,400,000us-gaap_GoodwillPurchaseAccountingAdjustments
/ us-gaap_BalanceSheetLocationAxis
= iart_DeferredTaxLiabilityMember
/ us-gaap_BusinessAcquisitionAxis
= iart_ConfluentSurgicalInc.Member