ACCRUED LIABILITIES (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Payables and Accruals [Abstract]
Sales, excise, property and income taxes	$ 3,276	$ 5,002
Current portion of business acquisition obligation	2,843	2,702
Purchase of intangible assets	2,500	0
Logistics	2,486	3,185
Deferred compensation	1,540	1,341
Salaries and other employee-related	1,096	4,048
Accrued interest	947	407
Derivative contract liability	624	422
Sand purchases and royalties	520	659
Current portion of contract termination	135	0
Mining	0	951
Deferred revenue	0	127
Construction	0	3,379
Other	2,434	2,188
Total	$ 18,401	$ 24,411