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INCOME TAXES (Narrative) (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Income Tax [Line Items] |  |  |
Change in effective income tax rate during the period | 11.80%iart_EffectiveIncomeTaxRateReconciliationIncreaseDecreaseDuringPeriodPercent |  |
Income tax benefit for release of tax contingency reserve | $ 2.2 iart_IncreaseDecreasetoUncertainTaxAccrual | $ 2.7 iart_IncreaseDecreasetoUncertainTaxAccrual |
Tax Settlements | 1.1 us-gaap_TaxAdjustmentsSettlementsAndUnusualProvisions |  |
Income tax expense for repatriation of foreign earnings | 0.25 us-gaap_IncomeTaxReconciliationRepatriationOfForeignEarnings | (2.70)us-gaap_IncomeTaxReconciliationRepatriationOfForeignEarnings | (1.30)us-gaap_IncomeTaxReconciliationRepatriationOfForeignEarnings
Effective foreign income tax rate | 6.90%iart_EffectiveForeignIncomeTaxRateReconciliationContinuingOperations | (60.60%)iart_EffectiveForeignIncomeTaxRateReconciliationContinuingOperations | 7.80%iart_EffectiveForeignIncomeTaxRateReconciliationContinuingOperations
Change in effective foreign income tax rate during period | (66.00%)iart_EffectiveForeignIncomeTaxRateReconciliationIncreaseDecreaseDuringPeriodPercent | 83.00%iart_EffectiveForeignIncomeTaxRateReconciliationIncreaseDecreaseDuringPeriodPercent |
Undistributed Earnings of Foreign Subsidiaries | 223.5 us-gaap_UndistributedEarningsOfForeignSubsidiaries |  |
Estimated Tax Liability on Undistributed Earnings of Foreign Subsidiaries | 36.4 iart_EstimatedTaxLiabilityonUndistributedEarningsofForeignSubsidiaries |  |
Operating Loss Carryforwards, Not Subject to Expiration | 23.2 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsNotSubjectToExpiration |  |
Tax Deductions in Excess of Previously Recorded Benefits Based on Option Value at the Time of Grant |  |  | 0.1 iart_OperatingLossCarryforwardsTaxDeductionsInExcessOfPreviouslyRecordedBenefitsBasedOnOptionValueAtTimeOfGrant
Deferred Tax Assets, Valuation Allowance | 7.3 us-gaap_DeferredTaxAssetsValuationAllowance | 9.0 us-gaap_DeferredTaxAssetsValuationAllowance | 14.2 us-gaap_DeferredTaxAssetsValuationAllowance
Deferred Tax Assets, Gross | 103.7 us-gaap_DeferredTaxAssetsGross | 110.2 us-gaap_DeferredTaxAssetsGross | 110.5 us-gaap_DeferredTaxAssetsGross
Valuation Allowances and Reserves, Period Increase (Decrease) | (1.8)us-gaap_ValuationAllowancesAndReservesPeriodIncreaseDecrease | (5.2)us-gaap_ValuationAllowancesAndReservesPeriodIncreaseDecrease |
Unrecognized Tax Benefits that Would Impact Effective Tax Rate | 1.2 us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate |  |
Amount of Unrecorded Benefit Expected to be Recognized | 0.5 us-gaap_SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit |  |
Income Tax Penalties and Interest Expense | 0.2 us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense | 0.8 us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense | (0.1)us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense
Penalties and Interest Accrued | 0.1 us-gaap_IncomeTaxExaminationPenaltiesAndInterestAccrued | 0.4 us-gaap_IncomeTaxExaminationPenaltiesAndInterestAccrued | 1.4 us-gaap_IncomeTaxExaminationPenaltiesAndInterestAccrued
Valuation Allowance, Change in Amount |  |  | 0.5 us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
Audits Settled During Year |  |  | 2008 through 2010
Liability (Refund) Adjustment from Settlement with Taxing Authority |  |  | 2.1 us-gaap_IncomeTaxExaminationLiabilityRefundAdjustmentFromSettlementWithTaxingAuthority
Tax Settlement Amount |  |  | 0.2 us-gaap_IncomeTaxReconciliationTaxSettlementsDomestic
Uncertain Taxes Reclassified |  |  | 4.2 iart_UncertainTaxesReclassified
Internal Revenue Service (IRS) |  |  |
Income Tax [Line Items] |  |  |
Operating Loss Carryforwards | 42.3 us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = us-gaap_InternalRevenueServiceIRSMember |  |
Foreign Tax Authority |  |  |
Income Tax [Line Items] |  |  |
Operating Loss Carryforwards | 33.2 us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember |  |
Operating Loss Carryforwards, Subject to Expiration | 10.0 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember |  |
State and Local Jurisdiction |  |  |
Income Tax [Line Items] |  |  |
Operating Loss Carryforwards | $ 23.2 us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember |  |

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