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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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