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STOCK-BASED COMPENSATION (Details)
$ in Millions
3 Months Ended 6 Months Ended 9 Months Ended
Jul. 02, 2015
USD ($)
Sep. 30, 2016
USD ($)
Dec. 31, 2015
USD ($)
Sep. 30, 2016
USD ($)
plan
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation arrangement by share-based payment award, number of plans | plan       3
Grants in period, net of forfeitures (in shares) | shares       111,662
Requisite service periods of awards, in years       3 years
Stock options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options exercisable, vesting period, in years       4 years
Total unrecognized compensation costs   $ 3.4   $ 3.4
Weighted-average period for cost recognition, in years       2 years
Restricted stock awards/stock units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options exercisable, vesting period, in years       3 years
Total unrecognized compensation costs   17.8   $ 17.8
Weighted-average period for cost recognition, in years       2 years
Awards granted during the period (in shares) | shares       157,131
Performance shares        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Awards granted during the period (in shares) | shares       78,177
SeaSpine Inc. | Spinoff        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Incremental increase in stock based award expense after spinoff $ 4.4 0.1 $ 3.3 $ 0.5
Total unrecognized compensation costs   $ 0.6   $ 0.6
Employee | Stock options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Expiration period, in years       8 years
Directors and certain executive officers | Minimum | Stock options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Expiration period, in years       8 years
Directors and certain executive officers | Maximum | Stock options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Expiration period, in years       10 years