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TREASURY STOCK (Narrative) (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Oct. 28, 2014
Accelerated Share Repurchases [Line Items]      
Repurchase of common stock, shares 0us-gaap_TreasuryStockSharesAcquired 0us-gaap_TreasuryStockSharesAcquired  
2014 Share Repurchase Program      
Accelerated Share Repurchases [Line Items]      
Stock repurchase authorized amount     $ 75,000,000.0us-gaap_StockRepurchaseProgramAuthorizedAmount1
/ us-gaap_ShareRepurchaseProgramAxis
= iart_TwoThousandFourteenShareRepurchaseProgramMember
Amount available for share repurchase under this latest authorization 75,000,000.0us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1
/ us-gaap_ShareRepurchaseProgramAxis
= iart_TwoThousandFourteenShareRepurchaseProgramMember