DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Detail 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Derivatives, Fair Value
Derivative Asset, Collateral, Obligation to Return Cash, Offset	$ (58)
Futures Contracts
Derivatives, Fair Value
Unrealized gain (loss) on inventory hedges	1,600
Physical Fixed Price Derivative Contracts
Derivatives, Fair Value
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	32
Refined petroleum products | Futures Contracts
Derivatives, Fair Value
Derivative Asset, Collateral, Obligation to Return Cash, Offset	(26)
Derivative Carrying Value
Derivatives, Fair Value
Net derivative assets	13,299	67,686
Derivative Carrying Value | Physical Fixed Price Derivative Contracts
Derivatives, Fair Value
Net derivative assets	(34)
Carrying Value
Derivatives, Fair Value
Net derivative assets	13,299	67,686
Carrying Value | Physical Fixed Price Derivative Contracts
Derivatives, Fair Value
Net derivative assets	(2)
Derivatives NOT Designated as Hedging Instruments
Derivatives, Fair Value
Net derivative assets	11,674
Derivatives NOT Designated as Hedging Instruments | Physical Fixed Price Derivative Contracts
Derivatives, Fair Value
Net derivative assets	(34)
Derivatives NOT Designated as Hedging Instruments | Carrying Value
Derivatives, Fair Value
Net derivative assets		36,984
Derivatives Designated as Hedging Instruments
Derivatives, Fair Value
Net derivative assets	1,625
Derivatives Designated as Hedging Instruments | Carrying Value
Derivatives, Fair Value
Net derivative assets		30,702
Current derivative assets
Derivatives, Fair Value
Derivative Asset, Collateral, Obligation to Return Cash, Offset	(45,082)	(153,982)
Current derivative assets | Physical Fixed Price Derivative Contracts
Derivatives, Fair Value
Derivative Asset, Collateral, Obligation to Return Cash, Offset	1,066	(12)
Current derivative assets | Physical Index Derivative Contracts
Derivatives, Fair Value
Derivative Asset, Collateral, Obligation to Return Cash, Offset	(55)	(59)
Current derivative assets | Refined petroleum products | Futures Contracts
Derivatives, Fair Value
Derivative Asset, Collateral, Obligation to Return Cash, Offset	(46,093)	(153,911)
Current derivative assets | Derivative Carrying Value
Derivatives, Fair Value
Net derivative assets	66,816	223,171
Current derivative assets | Derivative Carrying Value | Physical Fixed Price Derivative Contracts
Derivatives, Fair Value
Net derivative assets	20,628	42,005
Current derivative assets | Derivative Carrying Value | Physical Index Derivative Contracts
Derivatives, Fair Value
Net derivative assets	95	112
Current derivative assets | Derivative Carrying Value | Refined petroleum products | Futures Contracts
Derivatives, Fair Value
Net derivative assets	46,093	181,054
Current derivative assets | Carrying Value
Derivatives, Fair Value
Net derivative assets	21,734	69,189
Current derivative assets | Carrying Value | Physical Fixed Price Derivative Contracts
Derivatives, Fair Value
Net derivative assets	21,694	41,993
Current derivative assets | Carrying Value | Physical Index Derivative Contracts
Derivatives, Fair Value
Net derivative assets	40	53
Current derivative assets | Carrying Value | Refined petroleum products | Futures Contracts
Derivatives, Fair Value
Net derivative assets		27,143
Current derivative assets | Derivatives NOT Designated as Hedging Instruments
Derivatives, Fair Value
Net derivative assets	65,186	192,469
Current derivative assets | Derivatives NOT Designated as Hedging Instruments | Physical Fixed Price Derivative Contracts
Derivatives, Fair Value
Net derivative assets	20,628	42,005
Current derivative assets | Derivatives NOT Designated as Hedging Instruments | Physical Index Derivative Contracts
Derivatives, Fair Value
Net derivative assets	95	112
Current derivative assets | Derivatives NOT Designated as Hedging Instruments | Refined petroleum products | Futures Contracts
Derivatives, Fair Value
Net derivative assets	44,463	150,352
Current derivative assets | Derivatives Designated as Hedging Instruments
Derivatives, Fair Value
Net derivative assets	1,630	30,702
Current derivative assets | Derivatives Designated as Hedging Instruments | Refined petroleum products | Futures Contracts
Derivatives, Fair Value
Net derivative assets	1,630	30,702
Non-current derivative assets | Derivative Carrying Value
Derivatives, Fair Value
Net derivative assets	647	2,919
Non-current derivative assets | Derivative Carrying Value | Physical Fixed Price Derivative Contracts
Derivatives, Fair Value
Net derivative assets	621	2,919
Non-current derivative assets | Derivative Carrying Value | Refined petroleum products | Futures Contracts
Derivatives, Fair Value
Net derivative assets	26
Non-current derivative assets | Carrying Value
Derivatives, Fair Value
Net derivative assets	589	2,919
Non-current derivative assets | Carrying Value | Physical Fixed Price Derivative Contracts
Derivatives, Fair Value
Net derivative assets	589	2,919
Non-current derivative assets | Derivatives NOT Designated as Hedging Instruments
Derivatives, Fair Value
Net derivative assets	647	2,919
Non-current derivative assets | Derivatives NOT Designated as Hedging Instruments | Physical Fixed Price Derivative Contracts
Derivatives, Fair Value
Net derivative assets	621	2,919
Non-current derivative assets | Derivatives NOT Designated as Hedging Instruments | Refined petroleum products | Futures Contracts
Derivatives, Fair Value
Net derivative assets	26
Current derivative liabilities
Derivatives, Fair Value
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	45,082	153,982
Current derivative liabilities | Physical Fixed Price Derivative Contracts
Derivatives, Fair Value
Net derivative assets		12
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	(1,066)
Current derivative liabilities | Physical Index Derivative Contracts
Derivatives, Fair Value
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	55	59
Current derivative liabilities | Refined petroleum products | Futures Contracts
Derivatives, Fair Value
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	46,093	153,911
Current derivative liabilities | Derivative Carrying Value
Derivatives, Fair Value
Net derivative assets	(53,301)	(155,784)
Current derivative liabilities | Derivative Carrying Value | Physical Fixed Price Derivative Contracts
Derivatives, Fair Value
Net derivative assets	(2,319)	(1,502)
Current derivative liabilities | Derivative Carrying Value | Physical Index Derivative Contracts
Derivatives, Fair Value
Net derivative assets	(107)	(371)
Current derivative liabilities | Derivative Carrying Value | Refined petroleum products | Futures Contracts
Derivatives, Fair Value
Net derivative assets	(50,875)	(153,911)
Current derivative liabilities | Carrying Value
Derivatives, Fair Value
Net derivative assets	(8,219)	(1,802)
Current derivative liabilities | Carrying Value | Physical Fixed Price Derivative Contracts
Derivatives, Fair Value
Net derivative assets	(3,385)	(1,490)
Current derivative liabilities | Carrying Value | Physical Index Derivative Contracts
Derivatives, Fair Value
Net derivative assets	(52)	(312)
Current derivative liabilities | Carrying Value | Refined petroleum products | Futures Contracts
Derivatives, Fair Value
Net derivative assets	(4,782)
Current derivative liabilities | Derivatives NOT Designated as Hedging Instruments
Derivatives, Fair Value
Net derivative assets	(53,296)	(155,784)
Current derivative liabilities | Derivatives NOT Designated as Hedging Instruments | Physical Fixed Price Derivative Contracts
Derivatives, Fair Value
Net derivative assets	(2,319)	(1,502)
Current derivative liabilities | Derivatives NOT Designated as Hedging Instruments | Physical Index Derivative Contracts
Derivatives, Fair Value
Net derivative assets	(107)	(371)
Current derivative liabilities | Derivatives NOT Designated as Hedging Instruments | Refined petroleum products | Futures Contracts
Derivatives, Fair Value
Net derivative assets	(50,870)	(153,911)
Current derivative liabilities | Derivatives Designated as Hedging Instruments
Derivatives, Fair Value
Net derivative assets	(5)
Current derivative liabilities | Derivatives Designated as Hedging Instruments | Refined petroleum products | Futures Contracts
Derivatives, Fair Value
Net derivative assets	(5)
Non-current derivative liabilities
Derivatives, Fair Value
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	58
Non-current derivative liabilities | Refined petroleum products | Futures Contracts
Derivatives, Fair Value
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	26
Non-current derivative liabilities | Derivative Carrying Value
Derivatives, Fair Value
Net derivative assets	(863)	(2,620)
Non-current derivative liabilities | Derivative Carrying Value | Physical Fixed Price Derivative Contracts
Derivatives, Fair Value
Net derivative assets		(5)
Non-current derivative liabilities | Derivative Carrying Value | Refined petroleum products | Futures Contracts
Derivatives, Fair Value
Net derivative assets	(829)	(2,615)
Non-current derivative liabilities | Carrying Value
Derivatives, Fair Value
Net derivative assets	(805)	(2,620)
Non-current derivative liabilities | Carrying Value | Physical Fixed Price Derivative Contracts
Derivatives, Fair Value
Net derivative assets		(5)
Non-current derivative liabilities | Carrying Value | Refined petroleum products | Futures Contracts
Derivatives, Fair Value
Net derivative assets	(803)	(2,615)
Non-current derivative liabilities | Derivatives NOT Designated as Hedging Instruments
Derivatives, Fair Value
Net derivative assets	(863)	(2,620)
Non-current derivative liabilities | Derivatives NOT Designated as Hedging Instruments | Physical Fixed Price Derivative Contracts
Derivatives, Fair Value
Net derivative assets		(5)
Non-current derivative liabilities | Derivatives NOT Designated as Hedging Instruments | Refined petroleum products | Futures Contracts
Derivatives, Fair Value
Net derivative assets	$ (829)	$ (2,615)