DEFERRED CHARGES AND OTHER ASSETS, NET (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Deferred turnaround costs, net	$ 722,700	$ 673,100
Catalyst, net	132,700	124,300
Environmental credits	37,800	37,800
Finance lease assets	24,200	0
Linefill	19,500	19,500
Pension plan assets	10,300	9,700
Intangible assets, net	500	500
Other	6,500	6,900
Total deferred charges and other assets, net	954,200	871,800
Amortization expense	256,800	207,200	$ 144,000
Intangible Assets, Net [Abstract]
Intangible assets - gross	4,000	4,000
Accumulated amortization	(3,500)	(3,500)
Intangible assets - net	500	500
Indefinitely-Lived Precious Metal [Member]
Catalyst, net	$ 74,500	$ 73,100