SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017 customer	Jun. 30, 2016	Dec. 31, 2016 USD ($)
Concentration risk by major customer
Concentration of Major Customers
Number of major customers | customer			3
Net revenue | Concentration risk by major customer
Concentration of Major Customers
Percentage of revenue from customers to total revenue	89.00%	85.00%	89.00%	87.00%
Net revenue | Concentration risk by major customer | Largest customer
Concentration of Major Customers
Percentage of revenue from customers to total revenue	35.00%	32.00%	35.00%	32.00%
Net revenue | Concentration risk by major customer | Second largest customer
Concentration of Major Customers
Percentage of revenue from customers to total revenue	29.00%	27.00%	29.00%	28.00%
Net revenue | Concentration risk by major customer | Third largest customer
Concentration of Major Customers
Percentage of revenue from customers to total revenue	25.00%	26.00%	25.00%	27.00%
Long-term debt
Concentration of Major Customers
Debt issuance costs reclassified (from) to | $					$ 0.0