DEFERRED CHARGES AND OTHER ASSETS, NET (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Deferred turnaround costs, net	$ 177,236	$ 204,987
Catalyst	77,725	77,322
Linefill	13,504	10,230
Restricted cash	1,500	1,521
Intangible assets, net	219	357
Other	20,529	5,972
Deferred charges and other assets	290,713	300,389
Amortization expense	102,636	65,452	$ 32,066
Intangible Assets, Net [Abstract]
Gross amount	3,597	3,599
Accumulated amortization	(3,378)	(3,242)
Net amount	$ 219	$ 357