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FAIR VALUE MEASUREMENTS (Details) (Fair Value, Measurements, Recurring, USD $)	Sep. 30, 2013	Dec. 31, 2012
Level 1
Fair value measurements
Fair value	$ 7,753,000	$ (7,570,000)
Level 1 \| Refined products \| Futures Contracts
Fair value measurements
Financial assets	7,770,000
Financial liabilities	(17,000)	(7,570,000)
Level 2
Fair value measurements
Fair value	(34,901,000)	(131,505,000)
Level 2 \| Physical Fixed Price Derivative Contracts
Fair value measurements
Financial assets	2,482,000	1,154,000
Financial liabilities	(1,874,000)	(2,042,000)
Level 2 fixed-price contracts assets, CVA	(100,000)	(100,000)
Level 2 \| Physical Index Derivative Contracts
Fair value measurements
Financial assets	81,000	565,000
Financial liabilities	(273,000)	(546,000)
Level 2 \| Interest rate contracts
Fair value measurements
Financial liabilities	$ (35,317,000)	$ (130,636,000)

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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- Definition

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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