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STOCK-BASED COMPENSATION (Details)
$ in Millions
3 Months Ended 6 Months Ended
Jul. 02, 2015
USD ($)
Mar. 31, 2016
USD ($)
plan
shares
Dec. 31, 2015
USD ($)
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   $ 4.2  
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   $ 23.7  
Weighted-average period for cost recognition, in years   2 years  
Awards granted during period | shares   124,123  
Performance shares      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Awards granted during period | 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 $ 0.2 $ 3.3
Total unrecognized compensation costs   $ 0.9  
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