CONCENTRATIONS, SIGNIFICANT CUSTOMERS, COMMITMENTS AND CONTINGENCIES -Narrative (Details)			12 Months Ended
	Jun. 15, 2016	Feb. 12, 2016 lawsuit	Dec. 31, 2018 independent_director
Long-term Purchase Commitment [Line Items]
Marketing, sales, and logistical duties agreement, term of contract	5 years
Number of independent directors in related party committee | independent_director			2
Vertex Refining LA, LLC
Long-term Purchase Commitment [Line Items]
Number of lawsuits filed against subsidiary | lawsuit		5