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SUMMARY OF SIGNIFICANT ACCOUNT POLICIES (Narrative) (Details) (USD $)
 12 Months Ended 1 Months Ended 3 Months Ended
Dec. 31, 2014
Segment
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Jul. 31, 2013
Dec. 31, 2013
Dec. 31, 2012
Sep. 30, 2014
Summary Of Significant Accounting Policies [Line Items]                  
Provision (benefit) for income taxes $ 8,975,000us-gaap_IncomeTaxExpenseBenefit $ (10,235,000)us-gaap_IncomeTaxExpenseBenefit $ 10,825,000us-gaap_IncomeTaxExpenseBenefit            
Capitalized interest     2,100,000us-gaap_InterestCostsCapitalized 1,400,000us-gaap_InterestCostsCapitalized 400,000us-gaap_InterestCostsCapitalized        
Number of reportable segments 5us-gaap_NumberOfReportableSegments                
Inventory, Capitalized Expenses 0iart_InventoryCapitalizedExpenses 0iart_InventoryCapitalizedExpenses              
Depreciation expense 30,200,000us-gaap_Depreciation 27,600,000us-gaap_Depreciation 27,500,000us-gaap_Depreciation            
Interest expense capitalized to property, plant, and equipment 2,600,000us-gaap_InterestCostsCapitalizedAdjustment 3,200,000us-gaap_InterestCostsCapitalizedAdjustment              
Goodwill impairment charge 0us-gaap_GoodwillImpairmentLoss 46,738,000us-gaap_GoodwillImpairmentLoss 0us-gaap_GoodwillImpairmentLoss            
Impairment of Indefinite-lived Assets 0us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill                
Amortization expense 31,800,000us-gaap_AdjustmentForAmortization 19,400,000us-gaap_AdjustmentForAmortization 25,100,000us-gaap_AdjustmentForAmortization            
Annual amortization expense expected to approximate in 2015 32,100,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths                
Annual amortization expense expected to approximate in 2016 29,900,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo                
Annual amortization expense expected to approximate in 2017 27,800,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree                
Annual amortization expense expected to approximate in 2018 27,500,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour                
Annual amortization expense expected to approximate in 2019 26,700,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive                
Charitable contributions 600,000iart_CharitableContributions 600,000iart_CharitableContributions 1,000,000iart_CharitableContributions            
Undistributed Earnings of Foreign Subsidiaries 223,500,000us-gaap_UndistributedEarningsOfForeignSubsidiaries                
Amount of Unrecognized Deferred Tax Liability 36,400,000us-gaap_DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfForeignSubsidiaries                
Distribution and handling costs 14,300,000us-gaap_ShippingHandlingAndTransportationCosts 14,100,000us-gaap_ShippingHandlingAndTransportationCosts 13,600,000us-gaap_ShippingHandlingAndTransportationCosts            
Extended warranties, in years 2 years                
Accrued warranty expense 300,000us-gaap_ProductWarrantyAccrual 300,000us-gaap_ProductWarrantyAccrual         300,000us-gaap_ProductWarrantyAccrual    
Capitalized research and development costs 200,000us-gaap_IndefinitelivedIntangibleAssetsAcquired 300,000us-gaap_IndefinitelivedIntangibleAssetsAcquired              
Pension contributions 900,000us-gaap_PensionContributions 800,000us-gaap_PensionContributions 800,000us-gaap_PensionContributions            
Interest paid 10,900,000us-gaap_InterestPaid 9,500,000us-gaap_InterestPaid 12,000,000us-gaap_InterestPaid            
Interest paid, capitalized 2,600,000us-gaap_InterestPaidCapitalized 3,200,000us-gaap_InterestPaidCapitalized 2,100,000us-gaap_InterestPaidCapitalized            
Income taxes paid 10,900,000us-gaap_IncomeTaxesPaid 7,600,000us-gaap_IncomeTaxesPaid 12,700,000us-gaap_IncomeTaxesPaid            
Capital expenditures incurred but not yet paid 3,600,000us-gaap_CapitalExpendituresIncurredButNotYetPaid 8,600,000us-gaap_CapitalExpendituresIncurredButNotYetPaid 9,500,000us-gaap_CapitalExpendituresIncurredButNotYetPaid            
Europe                  
Summary Of Significant Accounting Policies [Line Items]                  
Accounts receivables from certain European countries customers 6,200,000us-gaap_AccountsReceivableNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember		 6,100,000us-gaap_AccountsReceivableNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember		         6,100,000us-gaap_AccountsReceivableNet
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember		    
Accounts receivable reserved from certain European countries 300,000us-gaap_AllowanceForDoubtfulAccountsReceivable
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember		 700,000us-gaap_AllowanceForDoubtfulAccountsReceivable
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember		         700,000us-gaap_AllowanceForDoubtfulAccountsReceivable
/ us-gaap_StatementGeographicalAxis
= us-gaap_EuropeMember		    
In-Process Research And Development                  
Summary Of Significant Accounting Policies [Line Items]                  
Impairment charges 200,000us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_InProcessResearchAndDevelopmentMember		 400,000us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_InProcessResearchAndDevelopmentMember		 100,000us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_InProcessResearchAndDevelopmentMember		            
Technology                  
Summary Of Significant Accounting Policies [Line Items]                  
Amortization expense, included in cost of product revenues 19,300,000us-gaap_CostOfGoodsSoldAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= iart_TechnologyMember		 6,700,000us-gaap_CostOfGoodsSoldAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= iart_TechnologyMember		 6,600,000us-gaap_CostOfGoodsSoldAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= iart_TechnologyMember		            
U.S. Spine                  
Summary Of Significant Accounting Policies [Line Items]                  
Goodwill impairment charge           46,700,000us-gaap_GoodwillImpairmentLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iart_U.S.SpineMember		      
Goodwill Tax Deductible Amount             16,200,000iart_GoodwillTaxDeductibleAmount
/ us-gaap_StatementBusinessSegmentsAxis
= iart_U.S.SpineMember		    
Computer Equipment                  
Summary Of Significant Accounting Policies [Line Items]                  
Capital Leased Assets, Gross 2,000,000us-gaap_CapitalLeasedAssetsGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ComputerEquipmentMember		 1,600,000us-gaap_CapitalLeasedAssetsGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ComputerEquipmentMember		         1,600,000us-gaap_CapitalLeasedAssetsGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ComputerEquipmentMember		    
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation 700,000us-gaap_CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ComputerEquipmentMember		 100,000us-gaap_CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ComputerEquipmentMember		         100,000us-gaap_CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ComputerEquipmentMember		    
Out-of-period Adjustment                  
Summary Of Significant Accounting Policies [Line Items]                  
Provision (benefit) for income taxes   (2,422,000)us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementScenarioAxis
= us-gaap_RestatementAdjustmentMember		         1,000,000us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_StatementScenarioAxis
= us-gaap_RestatementAdjustmentMember		    
Capitalized interest               3,300,000us-gaap_InterestCostsCapitalized
/ us-gaap_StatementScenarioAxis
= us-gaap_RestatementAdjustmentMember		  
First Three Quarters of 2012 | Out-of-period Adjustment                  
Summary Of Significant Accounting Policies [Line Items]                  
Capitalized interest               1,500,000us-gaap_InterestCostsCapitalized
/ iart_AffectedAdjustmentPeriodAxis
= iart_FirstThreeQuartersOf2012Member
/ us-gaap_StatementScenarioAxis
= us-gaap_RestatementAdjustmentMember		  
Full Year 2011 | Out-of-period Adjustment                  
Summary Of Significant Accounting Policies [Line Items]                  
Capitalized interest               1,400,000us-gaap_InterestCostsCapitalized
/ iart_AffectedAdjustmentPeriodAxis
= iart_FullYear2011Member
/ us-gaap_StatementScenarioAxis
= us-gaap_RestatementAdjustmentMember		  
Last Quarter of 2010 | Out-of-period Adjustment                  
Summary Of Significant Accounting Policies [Line Items]                  
Capitalized interest               400,000us-gaap_InterestCostsCapitalized
/ iart_AffectedAdjustmentPeriodAxis
= iart_LastQuarterOf2010Member
/ us-gaap_StatementScenarioAxis
= us-gaap_RestatementAdjustmentMember		  
Sales Revenue, Net                  
Summary Of Significant Accounting Policies [Line Items]                  
Concentration risk, percentage 10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember		 10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember		 10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember		            
Concentration Risk, Number of Customers Over Benchmark 0iart_ConcentrationRiskNumberofCustomersOverBenchmark
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember		 0iart_ConcentrationRiskNumberofCustomersOverBenchmark
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember		 0iart_ConcentrationRiskNumberofCustomersOverBenchmark
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember		            
Deferred tax accounts in 2011 error | Out-of-period Adjustment                  
Summary Of Significant Accounting Policies [Line Items]                  
Provision (benefit) for income taxes             900,000us-gaap_IncomeTaxExpenseBenefit
/ us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementByRestatementPeriodAndAmountAxis
= iart_DeferredTaxAccountsin2011ErrorMember
/ us-gaap_StatementScenarioAxis
= us-gaap_RestatementAdjustmentMember		    
Confluent Surgical, Inc.                  
Summary Of Significant Accounting Policies [Line Items]                  
Impairment of Finite-lived Assets                 $ 600,000us-gaap_ImpairmentOfIntangibleAssetsFinitelived
/ us-gaap_BusinessAcquisitionAxis
= iart_ConfluentSurgicalInc.Member