ACQUISITIONS (Additional Information) (Details) - USD ($)		6 Months Ended	12 Months Ended
	Jul. 01, 2016	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Net income			$ 102,944,000	$ 457,200,000	$ 235,886,000
Acquisition costs			0	488,000	13,622,000
Torrance Refinery [Member]
Business Acquisition [Line Items]
Net cash	$ 521,350,000		$ 0	$ 0	$ 971,932,000
Revenues		$ 1,977,204,000
Net income		$ 86,394,000