COMMITMENTS AND CONTINGENCIES (Fair Value Supply Agreement) (Details) - Level 3 - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Accrued Expenses And Other Current Liabilities | Supply Agreement Liability, Short-term
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Transfer from long-term to current potion	$ 0
Accrued Expenses And Other Current Liabilities | Supply Agreement Liability, Short-term | Selling, general and administrative
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loss from increase in fair value	0
Other Noncurrent Liabilities | Supply Agreement Liability, Long-term
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Payments	0
Transfer from long-term to current potion	0
Commitments | Accrued Expenses And Other Current Liabilities | Supply Agreement Liability, Short-term
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	166	$ 1,991
Payments	(166)	(2,000)
Transfer from long-term to current potion		161
Balance, End of Period	0	166
Commitments | Accrued Expenses And Other Current Liabilities | Supply Agreement Liability, Short-term | Selling, general and administrative
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loss from increase in fair value		14
Commitments | Accrued Expenses And Other Current Liabilities | Supply Agreement Liability, Short-term | Goodwill
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Other		0
Commitments | Accrued Expenses And Other Current Liabilities | Above Market Supply Agreement Liability, Short-term
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	0	0
Payments	(113)
Transfer from long-term to current potion	3,273
Loss from increase in fair value	(519)
Balance, End of Period	2,641	0
Commitments | Other Noncurrent Liabilities | Supply Agreement Liability, Long-term
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	0	161
Transfer from long-term to current potion		(161)
Balance, End of Period	0	0
Commitments | Other Noncurrent Liabilities | Above Market Supply Agreement Liability, Long-term
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	2,648	931
Payments	(415)	(47)
Transfer from long-term to current potion	(3,273)
Balance, End of Period	0	2,648
Commitments | Other Noncurrent Liabilities | Above Market Supply Agreement Liability, Long-term | Selling, general and administrative
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loss from increase in fair value	$ 1,040	1,083
Commitments | Other Noncurrent Liabilities | Above Market Supply Agreement Liability, Long-term | Goodwill
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Other		$ 681