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COMMITMENTS AND CONTINGENCIES (Details)
$ in Millions
Sep. 30, 2015
USD ($)
multiple
executive_officer
Dec. 31, 2014
USD ($)
Feb. 26, 2014
opponent
Loss Contingencies [Line Items]      
Purchase Commitment, Remaining Minimum Amount Committed | $ $ 12.8 $ 9.1  
Opponents in Legal Case That File Timely Appeals     2
Opponents in Legal Case     3
Commitment With Executive Officers [Member]      
Loss Contingencies [Line Items]      
Number of executive officers under agreement | executive_officer 7    
Multiple of sum of average annual base salary and bonus agreement terms | multiple 2