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ACQUISITIONS AND PRO FORMA RESULTS (Schedule of Assets Acquired and Liabilities Assumed) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended | 0 Months Ended |  |
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Dec. 31, 2014 | Jan. 24, 2013 | Dec. 31, 2013 | Jan. 15, 2014
Business Acquisition [Line Items] |  |  |  |
Goodwill | 363,888 us-gaap_Goodwill |  | $ 249,764 us-gaap_Goodwill |
Metasurg |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Inventory | 4,730 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory / us-gaap_BusinessAcquisitionAxis = iart_MetasurgMember |  |  |
Property, plant, and equipment | 1,171 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / us-gaap_BusinessAcquisitionAxis = iart_MetasurgMember |  |  |
Goodwill | 469 us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = iart_MetasurgMember |  |  |
Net assets acquired | 27,150 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet / us-gaap_BusinessAcquisitionAxis = iart_MetasurgMember |  |  |
Metasurg | Technology-Based Intangible Assets |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Technology | 20,590 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles / us-gaap_BusinessAcquisitionAxis = iart_MetasurgMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TechnologyBasedIntangibleAssetsMember |  |  |
Medtronic MicroFrance |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Inventory | 3,765 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedInventory / us-gaap_BusinessAcquisitionAxis = iart_MedtronicMicroFranceMember |  |  |
Property, plant, and equipment | 3,675 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / us-gaap_BusinessAcquisitionAxis = iart_MedtronicMicroFranceMember |  |  |
Goodwill | 17,435 us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = iart_MedtronicMicroFranceMember |  |  |
Cash | 2,195 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents / us-gaap_BusinessAcquisitionAxis = iart_MedtronicMicroFranceMember |  |  |
Prepaid expenses | 620 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets / us-gaap_BusinessAcquisitionAxis = iart_MedtronicMicroFranceMember |  |  |
Other current assets | 5,025 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther / us-gaap_BusinessAcquisitionAxis = iart_MedtronicMicroFranceMember |  |  |
Total assets acquired | 67,415 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets / us-gaap_BusinessAcquisitionAxis = iart_MedtronicMicroFranceMember |  |  |
Accounts payable and other liabilities | 5,800 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther / us-gaap_BusinessAcquisitionAxis = iart_MedtronicMicroFranceMember |  |  |
Net assets acquired | 61,615 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet / us-gaap_BusinessAcquisitionAxis = iart_MedtronicMicroFranceMember |  |  |
Medtronic MicroFrance | Technology-Based Intangible Assets |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Technology | 4,580 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles / us-gaap_BusinessAcquisitionAxis = iart_MedtronicMicroFranceMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TechnologyBasedIntangibleAssetsMember |  |  |
Medtronic MicroFrance | Trade Name |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Technology | 11,990 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles / us-gaap_BusinessAcquisitionAxis = iart_MedtronicMicroFranceMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TradeNamesMember |  |  |
Medtronic MicroFrance | Customer Relationships |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Technology | 18,130 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles / us-gaap_BusinessAcquisitionAxis = iart_MedtronicMicroFranceMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember |  |  |
Confluent Surgical, Inc. |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Property, plant, and equipment |  |  |  | 438 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment / us-gaap_BusinessAcquisitionAxis = iart_ConfluentSurgicalInc.Member
Goodwill |  |  |  | 105,331 us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = iart_ConfluentSurgicalInc.Member
Prepaid expenses |  |  |  | 4,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets / us-gaap_BusinessAcquisitionAxis = iart_ConfluentSurgicalInc.Member
Deferred tax asset - long term |  |  |  | 12 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssetsNoncurrent / us-gaap_BusinessAcquisitionAxis = iart_ConfluentSurgicalInc.Member
Total assets acquired |  |  |  | 349,981 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets / us-gaap_BusinessAcquisitionAxis = iart_ConfluentSurgicalInc.Member
Contingent supply liability |  |  |  | 5,891 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedContingentLiability / us-gaap_BusinessAcquisitionAxis = iart_ConfluentSurgicalInc.Member
Accounts payable and other liabilities |  |  |  | 731 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther / us-gaap_BusinessAcquisitionAxis = iart_ConfluentSurgicalInc.Member
Deferred tax liability |  |  |  | 87,464 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent / us-gaap_BusinessAcquisitionAxis = iart_ConfluentSurgicalInc.Member
Net assets acquired |  |  |  | 255,895 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet / us-gaap_BusinessAcquisitionAxis = iart_ConfluentSurgicalInc.Member
Confluent Surgical, Inc. | Developed Technology Rights |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Technology |  |  |  | 239,800 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles / us-gaap_BusinessAcquisitionAxis = iart_ConfluentSurgicalInc.Member / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_DevelopedTechnologyRightsMember
Confluent Surgical, Inc. | Other Intangible Assets |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Technology |  |  |  | 400 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles / us-gaap_BusinessAcquisitionAxis = iart_ConfluentSurgicalInc.Member / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_OtherIntangibleAssetsMember
Tarsus Medical, Inc. |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Goodwill |  | 116 us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = iart_TarsusMedicalIncMember |  |
Cash |  | 85 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents / us-gaap_BusinessAcquisitionAxis = iart_TarsusMedicalIncMember |  |
Prepaid expenses |  | 13 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets / us-gaap_BusinessAcquisitionAxis = iart_TarsusMedicalIncMember |  |
Deferred tax asset - long term |  | 1,334 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxAssetsNoncurrent / us-gaap_BusinessAcquisitionAxis = iart_TarsusMedicalIncMember |  |
Total assets acquired |  | 6,928 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets / us-gaap_BusinessAcquisitionAxis = iart_TarsusMedicalIncMember |  |
Accounts payable and other liabilities |  | 111 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther / us-gaap_BusinessAcquisitionAxis = iart_TarsusMedicalIncMember |  |
Deferred tax liability |  | 2,152 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent / us-gaap_BusinessAcquisitionAxis = iart_TarsusMedicalIncMember |  |
Net assets acquired |  | 4,665 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet / us-gaap_BusinessAcquisitionAxis = iart_TarsusMedicalIncMember |  |
Tarsus Medical, Inc. | Technology-Based Intangible Assets |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Technology |  | 5,040 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles / us-gaap_BusinessAcquisitionAxis = iart_TarsusMedicalIncMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TechnologyBasedIntangibleAssetsMember |  |
In-Process Research And Development | Metasurg |  |  |  |
Business Acquisition [Line Items] |  |  |  |
In-process research and development | 190 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets / us-gaap_BusinessAcquisitionAxis = iart_MetasurgMember / us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_InProcessResearchAndDevelopmentMember |  |  |
In-Process Research And Development | Tarsus Medical, Inc. |  |  |  |
Business Acquisition [Line Items] |  |  |  |
In-process research and development |  | 340 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets / us-gaap_BusinessAcquisitionAxis = iart_TarsusMedicalIncMember / us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_InProcessResearchAndDevelopmentMember |  |
Maximum | Metasurg | Technology-Based Intangible Assets |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Wtd. Avg. Life: | 14 years |  |  |
Maximum | Medtronic MicroFrance | Technology-Based Intangible Assets |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Wtd. Avg. Life: | 16 years |  |  |
Maximum | Medtronic MicroFrance | Trade Name |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Wtd. Avg. Life: | 20 years |  |  |
Maximum | Medtronic MicroFrance | Customer Relationships |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Wtd. Avg. Life: | 16 years |  |  |
Maximum | Confluent Surgical, Inc. | Technology-Based Intangible Assets |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Wtd. Avg. Life: | 20 years |  |  |
Maximum | Tarsus Medical, Inc. | Technology-Based Intangible Assets |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Wtd. Avg. Life: |  | 14 years |  |
Minimum | Metasurg | Technology-Based Intangible Assets |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Wtd. Avg. Life: | 8 years |  |  |
Minimum | Medtronic MicroFrance | Technology-Based Intangible Assets |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Wtd. Avg. Life: | 15 years |  |  |
Minimum | Medtronic MicroFrance | Customer Relationships |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Wtd. Avg. Life: | 12 years |  |  |
Minimum | Confluent Surgical, Inc. | Technology-Based Intangible Assets |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Wtd. Avg. Life: | 3 years |  |  |
Minimum | Tarsus Medical, Inc. | Technology-Based Intangible Assets |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Wtd. Avg. Life: |  | 10 years |  |

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