DISCONTINUED OPERATIONS (Narrative) (Details)		12 Months Ended			30 Months Ended
	Jul. 02, 2015 director	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2017 USD ($)	Jul. 01, 2015 USD ($)	Oct. 29, 2014 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income or expense after separation		$ 0	$ 0	$ (10,370,000)
SeaSpine Inc. | Supply Agreement Liability - Current
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue, SeaSpine		700,000	800,000	6,200,000
Cost of goods sold, SeaSpine		300,000	700,000	3,800,000
SeaSpine Inc. | Information Technology and Administrative Support
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue, SeaSpine			$ 300,000	2,700,000
SeaSpine Inc. | Discontinued Operations, Disposed of by Means Other than Sale, Spinoff
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Distribution of spinoff shares	100.00%
Shares of Integra for share of SeaSpine	0.3333
Cash following distribution						$ 47,178,000	$ 47,000,000
Gain (loss) recognized as result of distribution		$ 0
Income or expense after separation				$ (10,370,000)	$ 0
SeaSpine Inc. | Discontinued Operations, Disposed of by Means Other than Sale, Spinoff | Director
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of shared board members | director	3