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SEGMENT AND GEOGRAPHIC INFORMATION (Narrative) (Details) | 3 Months Ended | 12 Months Ended | 30 Months Ended
--- | --- | --- | ---
Mar. 31, 2015 Segment | Dec. 31, 2017 Segment product | Dec. 31, 2017 Segment
Segment Reporting Information [Line Items] |  |  |
Number of reportable segments | Segment | 3 | 2 | 2
Codman Specialty Surgical |  |  |
Segment Reporting Information [Line Items] |  |  |
Number of products offered (more than) | product |  | 60,000 |

X
- Definition Number of products sold by a segment + References No definition available. + Details
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Namespace Prefix: | iart_
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Balance Type: | na
Period Type: | duration

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
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Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=iart_CodmanSpecialtySurgicalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |