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GEOGRAPHIC AND SEGMENT INFORMATION - NARRATIVE (Details) - segment
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Concentration Risk [Line Items]      
Number of reportable segments 1    
Number of operating segments 3    
Net Revenue      
Concentration Risk [Line Items]      
Concentration receivable risk (as a percent) 54.40% 58.30% 61.00%
Customer concentration risk | Net Revenue | International customers      
Concentration Risk [Line Items]      
Concentration receivable risk (as a percent) 12.50% 16.90% 15.80%