DERIVATIVES (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014 Crude Oil and Feedstock Inventory [Member] Fair Value Hedging [Member] bbl	Dec. 31, 2013 Crude Oil and Feedstock Inventory [Member] Fair Value Hedging [Member] bbl	Mar. 31, 2014 Intermediates and Refined Products Inventory [Member] Not Designated as Hedging Instrument [Member] bbl	Dec. 31, 2013 Intermediates and Refined Products Inventory [Member] Not Designated as Hedging Instrument [Member] bbl	Mar. 31, 2014 Intermediates and Refined Products Inventory [Member] Fair Value Hedging [Member] bbl	Dec. 31, 2013 Intermediates and Refined Products Inventory [Member] Fair Value Hedging [Member] bbl	Mar. 31, 2014 Crude Oil Commodity Contract [Member] Not Designated as Hedging Instrument [Member] bbl	Dec. 31, 2013 Crude Oil Commodity Contract [Member] Not Designated as Hedging Instrument [Member] bbl	Mar. 31, 2014 Refined Product Commodity Contract [Member] Not Designated as Hedging Instrument [Member] bbl	Dec. 31, 2013 Refined Product Commodity Contract [Member] Not Designated as Hedging Instrument [Member] bbl
Derivative [Line Items]
Derivative, notional amount, volume			697,550	838,829	0	0	3,511,926	3,274,047	91,730,000	43,199,000	0	0
Loss on fair value hedge ineffectiveness	$ 0	$ 4,863