DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Details 4) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Hedge Ineffectiveness
Ineffectiveness excluding the time value component on fair value hedging instruments, net gain (loss) in income:
Ineffectiveness excluding the time value component on fair value hedging instruments	$ (800)	$ (2,765)	$ (505)	$ (3,477)
Derivatives NOT Designated as Hedging Instruments \| Product sales \| Physical Fixed Price Derivative Contracts
Gains (losses), derivative instruments
Gains (losses) on derivative instruments recognized in income	2,795	3,791	3,376	2,898
Derivatives NOT Designated as Hedging Instruments \| Product sales \| Physical Index Derivative Contracts
Gains (losses), derivative instruments
Gains (losses) on derivative instruments recognized in income	700	258	1,109	360
Derivatives NOT Designated as Hedging Instruments \| Cost of product sales and natural gas storage services \| Physical Fixed Price Derivative Contracts
Gains (losses), derivative instruments
Gains (losses) on derivative instruments recognized in income	(359)	784	(445)	(603)
Derivatives NOT Designated as Hedging Instruments \| Cost of product sales and natural gas storage services \| Physical Index Derivative Contracts
Gains (losses), derivative instruments
Gains (losses) on derivative instruments recognized in income	(541)	4	(544)	(39)
Derivatives NOT Designated as Hedging Instruments \| Cost of product sales and natural gas storage services \| Refined products \| Futures Contracts
Gains (losses), derivative instruments
Gains (losses) on derivative instruments recognized in income	1,457	1,960	5,797	5,331
Derivatives Designated as Hedging Instruments \| Cost of product sales and natural gas storage services \| Hedge Ineffectiveness
Ineffectiveness excluding the time value component on fair value hedging instruments, net gain (loss) in income:
Fair value hedge ineffectiveness (excluding time value)	(5,212)	172	(3,627)	(560)
Time value excluded from hedge assessment	4,412	(2,937)	3,122	(2,917)
Derivatives Designated as Hedging Instruments \| Cost of product sales and natural gas storage services \| Refined products
Derivatives designated as fair value hedging instruments:
Physical inventory - hedged items	(8,959)	(17,301)	(9,440)	11,157
Derivatives Designated as Hedging Instruments \| Cost of product sales and natural gas storage services \| Refined products \| Futures Contracts
Derivatives designated as fair value hedging instruments:
Future contracts for refined petroleum products	$ 8,159	$ 14,536	$ 8,935	$ (14,635)

Amount of gain (loss) from the increase (decrease) in fair value of derivative and nonderivative instruments designated as fair value hedging instruments recognized in the income statement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 25

-Section 50

-Paragraph 1

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Amount of the increase (decrease) in fair value of the hedged item in a fair value hedge recognized in the income statement.

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Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

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The portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

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-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959

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Net gain (loss) relating to components of the gain (loss) on the fair value hedging instrument excluded from the assessment of fair value hedge effectiveness. Recognized in earnings.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Amount of gain (loss)recognized in the income statement from the hedging ineffectiveness of a fair value hedge.

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