XML 58 R45.htm IDEA: XBRL DOCUMENT
v3.8.0.1

GOODWILL AND OTHER INTANGIBLE ASSETS - Components of Company's Identifiable Intangible Assets (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2018 | Dec. 31, 2016 | Dec. 31, 2017
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Cost | $ 1,422,020 |  | $ 1,416,615
Accumulated Amortization | (274,066) |  | (256,988)
Net | 1,147,954 |  | 1,159,627
Trade Names |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Cost | 162,900 |  | 162,900
Net | 162,900 |  | 162,900
In Process Research and Development |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Other indefinite-lived intangible assets | $ 1,000 |  | 1,000
Completed technology |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Weighted Average Life | 19 years | 19 years |
Cost | $ 873,943 |  | 869,174
Accumulated Amortization | (135,897) |  | (124,096)
Net | $ 738,046 |  | 745,078
Customer relationships |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Weighted Average Life | 13 years | 13 years |
Cost | $ 233,922 |  | 233,430
Accumulated Amortization | (95,942) |  | (91,961)
Net | $ 137,980 |  | 141,469
Trademarks/brand names |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Weighted Average Life | 28 years | 28 years |
Cost | $ 105,187 |  | 104,879
Accumulated Amortization | (23,258) |  | (22,293)
Net | $ 81,929 |  | 82,586
Supplier relationships |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Weighted Average Life | 27 years | 27 years |
Cost | $ 34,721 |  | 34,721
Accumulated Amortization | (15,449) |  | (15,092)
Net | $ 19,272 |  | 19,629
All other |  |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |  |
Weighted Average Life | 4 years | 4 years |
Cost | $ 11,347 |  | 11,511
Accumulated Amortization | (3,520) |  | (3,546)
Net | $ 7,827 |  | $ 7,965

X
- Definition Cost Of Definite And Indefinite Lived Intangible Assets Gross Excluding Goodwill. + References No definition available. + Details
Name: | iart_CostOfDefiniteAndIndefiniteLivedIntangibleAssetsGrossExcludingGoodwill
Namespace Prefix: | iart_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Definite And Indefinite Lived Intangible Assets Net Excluding Goodwill. + References No definition available. + Details
Name: | iart_DefiniteAndIndefiniteLivedIntangibleAssetsNetExcludingGoodwill
Namespace Prefix: | iart_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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_AcquiredFiniteLivedIntangibleAssetsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount after impairment of indefinite-lived intangible assets classified as other. Excludes financial assets and goodwill. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
Name: | us-gaap_OtherIndefiniteLivedIntangibleAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TradeNamesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_InProcessResearchAndDevelopmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=iart_CompletedTechnologyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CustomerRelationshipsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=iart_TrademarksBrandNamesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=iart_SupplierRelationShipsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=iart_AllOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |