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COMMITMENTS AND CONTINGENCIES - Additional Information (Details)
$ in Millions
Aug. 04, 2017
USD ($)
Sep. 07, 2012
lawsuit
Jun. 30, 2017
USD ($)
Commitments and Contingencies Disclosure [Abstract]      
Purchase obligation     $ 32.9
Shareholder Class Action      
Loss Contingencies [Line Items]      
Number of lawsuits | lawsuit   2  
Subsequent event | Shareholder Class Action      
Loss Contingencies [Line Items]      
Litigation settlement, amount awarded to other party $ (6.8)