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SELECTED QUARTERLY INFORMATION - UNAUDITED (Narrative) (Details) (USD $)
 3 Months Ended 12 Months Ended 1 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Jul. 31, 2013
Segment Reporting Information [Line Items]                
Goodwill impairment charge         $ 0us-gaap_GoodwillImpairmentLoss $ 46,738,000us-gaap_GoodwillImpairmentLoss $ 0us-gaap_GoodwillImpairmentLoss  
Global ERP implementation costs 5,600,000iart_GlobalErpImplementationCosts 5,000,000iart_GlobalErpImplementationCosts 7,600,000iart_GlobalErpImplementationCosts 6,100,000iart_GlobalErpImplementationCosts        
FDA remediation costs 400,000iart_FdaRemediationCosts 2,800,000iart_FdaRemediationCosts 3,000,000iart_FdaRemediationCosts 2,100,000iart_FdaRemediationCosts        
U.S. Spine                
Segment Reporting Information [Line Items]                
Goodwill impairment charge               $ 46,700,000us-gaap_GoodwillImpairmentLoss
/ us-gaap_StatementBusinessSegmentsAxis
= iart_U.S.SpineMember