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INCOME TAXES - Narrative (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Income Tax [Line Items]    
Reported tax rate 33.50%us-gaap_EffectiveIncomeTaxRateContinuingOperations 44.50%us-gaap_EffectiveIncomeTaxRateContinuingOperations
Minimum    
Income Tax [Line Items]    
Effective tax rate estimate 29.00%iart_EffectiveTaxRateEstimate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
 
Maximum    
Income Tax [Line Items]    
Effective tax rate estimate 30.00%iart_EffectiveTaxRateEstimate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
 
Foreign tax authority    
Income Tax [Line Items]    
Income tax reconciliation, settlements with tax authority   0.8us-gaap_IncomeTaxReconciliationTaxSettlements
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_ForeignCountryMember