BASIS OF PRESENTATION - Narrative (Details) $ in Thousands	Jan. 01, 2018 USD ($)
New Accounting Pronouncement, Early Adoption [Line Items]
Reclassification of stranded tax effect	$ 532
Accounting Standards Update 2018-02 \| New Accounting Pronouncement, Early Adoption, Effect
New Accounting Pronouncement, Early Adoption [Line Items]
Reclassification of stranded tax effect	$ 500

Amount of increase (decrease) in accumulated other comprehensive income (AOCI) for reclassification to retained earnings of tax effect from remeasurement of deferred tax pursuant to Tax Cuts and Jobs Act of 2017.

No definition available.

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Namespace Prefix:	iart_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration