INVENTORIES (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Jun. 30, 2015	Dec. 31, 2014
Inventory [Line Items]
Crude oil and feedstocks	$ 976,032		$ 976,032			$ 979,878
Refined products and blendstocks	855,517		855,517			775,767
Warehouse stock and other	40,890		40,890			36,726
Inventory, Gross	1,872,439		1,872,439			1,792,371
Lower of cost or market reserve	(771,257)		(771,257)		$ 562,944	(690,110)
Inventories	1,101,182		1,101,182			1,102,261
Operating Income (Loss)	65,073	$ 271,003	468,736	$ 613,283
Titled Inventory [Member]
Inventory [Line Items]
Crude oil and feedstocks	954,744		954,744			918,756
Refined products and blendstocks	545,279		545,279			520,308
Warehouse stock and other	40,890		40,890			36,726
Inventory, Gross	1,540,913		1,540,913			1,475,790
Lower of cost or market reserve	(662,638)		(662,638)			(609,774)
Inventories	878,275		878,275			866,016
Inventory Supply and Offtake Arrangements [Member]
Inventory [Line Items]
Crude oil and feedstocks	21,288		21,288			61,122
Refined products and blendstocks	310,238		310,238			255,459
Warehouse stock and other	0		0			0
Inventory, Gross	331,526		331,526			316,581
Lower of cost or market reserve	(108,619)		(108,619)			(80,336)
Inventories	222,907		222,907			$ 236,245
Scenario, Adjustment [Member]
Inventory [Line Items]
Operating Income (Loss)	$ (208,313)		$ (81,147)