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FAIR VALUE MEASUREMENTS - Narrative (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2016
Dec. 31, 2015
Discounted cash flows | Recurring | Level 3 | Contingent consideration    
Derivative [Line Items]    
Decrease to fair value measurement as a result of 100 basis point increase $ 0.2  
Increase to fair value measurement as a result of 100 basis point decrease 0.2  
Not designated as hedging instrument | Foreign exchange forward    
Derivative [Line Items]    
Notional amount of foreign currency $ 0.7 $ 2.4