COMMITMENTS AND CONTINGENCIES - Other (Details) $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($) customer
Short-term commitments
Short-term commitments for purchase of raw materials and production of finished goods | $	$ 143.7
Account receivable | Credit concentration | Three customers
Concentration risk
Number of customers | customer	3
Concentration risk (as a percent)	47.50%
Account receivable | Credit concentration | Customer one | Minimum
Concentration risk
Concentration risk (as a percent)	10.00%
Account receivable | Credit concentration | Customer two | Minimum
Concentration risk
Concentration risk (as a percent)	10.00%
Account receivable | Credit concentration | Customer three | Minimum
Concentration risk
Concentration risk (as a percent)	10.00%