GEOGRAPHIC AND SEGMENT INFORMATION - NARRATIVE (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017 product_line segment	Sep. 30, 2016	Dec. 31, 2016 segment
Segment Reporting [Abstract]
Number of reportable segments (in segments)					1
Number of operating segments (in segments)			3
Number of product lines (in product lines) | product_line			4
Geographic concentration risk | Sales Revenue | International customers
Concentration Risk [Line Items]
Concentration receivable risk (as a percent)	14.60%	13.20%	14.00%	14.90%