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SEGMENT AND GEOGRAPHIC INFORMATION (Revenue by Major Product Category) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues | $ 252,176 us-gaap_SalesRevenueGoodsNet | $ 229,719 us-gaap_SalesRevenueGoodsNet | $ 231,351 us-gaap_SalesRevenueGoodsNet | $ 215,059 us-gaap_SalesRevenueGoodsNet | $ 220,769 us-gaap_SalesRevenueGoodsNet | $ 213,246 us-gaap_SalesRevenueGoodsNet | $ 205,547 us-gaap_SalesRevenueGoodsNet | $ 196,652 us-gaap_SalesRevenueGoodsNet | $ 928,305 us-gaap_SalesRevenueGoodsNet | $ 836,214 us-gaap_SalesRevenueGoodsNet | $ 830,871 us-gaap_SalesRevenueGoodsNet
Orthopedics |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  | 370,082 us-gaap_SalesRevenueGoodsNet / us-gaap_ProductOrServiceAxis = iart_OrthopedicsMember | 370,359 us-gaap_SalesRevenueGoodsNet / us-gaap_ProductOrServiceAxis = iart_OrthopedicsMember | 364,714 us-gaap_SalesRevenueGoodsNet / us-gaap_ProductOrServiceAxis = iart_OrthopedicsMember
Neurosurgery |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  | 371,676 us-gaap_SalesRevenueGoodsNet / us-gaap_ProductOrServiceAxis = iart_NeurosurgeryMember | 278,672 us-gaap_SalesRevenueGoodsNet / us-gaap_ProductOrServiceAxis = iart_NeurosurgeryMember | 277,527 us-gaap_SalesRevenueGoodsNet / us-gaap_ProductOrServiceAxis = iart_NeurosurgeryMember
Instruments |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  |  |  |  | $ 186,547 us-gaap_SalesRevenueGoodsNet / us-gaap_ProductOrServiceAxis = iart_InstrumentsMember | $ 187,183 us-gaap_SalesRevenueGoodsNet / us-gaap_ProductOrServiceAxis = iart_InstrumentsMember | $ 188,630 us-gaap_SalesRevenueGoodsNet / us-gaap_ProductOrServiceAxis = iart_InstrumentsMember

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