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ACQUISITIONS Purchase Price (Details)
$ in Thousands
Jul. 01, 2016
USD ($)
refinery
Sep. 30, 2016
refinery
Business Acquisition [Line Items]    
Number Of Operating Refineries | refinery 5 4
Torrance Refinery [Member]    
Business Acquisition [Line Items]    
Gross purchase price $ 537,500  
Working capital 450,582  
Business Combination, Consideration Transferred, Post Close Purchase Price Adjustments (16,150)  
Consideration transferred $ 971,932