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INCOME TAXES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2015
Income Tax Contingency [Line Items]
Reported tax rate	694.60%	18.00%	119.70%	28.40%
Tax rate, excluding valuation allowance	29.80%	18.00%	33.10%	28.60%
Change in tax expense due to filing with tax authorities	$ 0.3		$ 0.9
Benefit in tax due to lapse of statue of limitations		$ 1.6		$ 1.9
SeaSpine Inc. | Spinoff
Income Tax Contingency [Line Items]
Increase in deferred tax valuation	$ 35.6		$ 35.6
Forecast
Income Tax Contingency [Line Items]
Reported tax rate					87.00%
Tax rate, excluding valuation allowance					32.00%

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