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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Details 2) (USD $)	3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Effect of derivative instruments on the Condensed Consolidated Balance Sheet
Fair Value Asset	$ 4,215,000	$ 50,824,000
Fair Value Liability	(29,899,000)	(192,000)
Unrealized (losses) gains included in Accumulated Other Comprehensive Income, pretax	(25,700,000)	50,600,000
Unrealized (losses) gains included in Accumulated Other Comprehensive Income, net of tax	(15,600,000)	30,700,000
Expected reclassification of income from commodity hedges over the next 12 months	13,300,000
Derivatives Designated as Hedging Instruments
Effect of derivative instruments on the Condensed Consolidated Balance Sheet
Fair Value Asset	4,215,000	50,824,000
Fair Value Liability	(29,899,000)	(192,000)
Derivatives Designated as Hedging Instruments | Commodity contracts | Current Assets
Effect of derivative instruments on the Condensed Consolidated Balance Sheet
Fair Value Asset	4,215,000	50,824,000
Derivatives Designated as Hedging Instruments | Commodity contracts | Current Liabilities
Effect of derivative instruments on the Condensed Consolidated Balance Sheet
Fair Value Liability	(26,100,000)	(192,000)
Derivatives Designated as Hedging Instruments | Commodity contracts | Non Current Liabilities
Effect of derivative instruments on the Condensed Consolidated Balance Sheet
Fair Value Liability	$ (3,799,000)

X

- Definition

Accumulated pretax change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges.

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Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses.

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The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

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Fair values as of the balance sheet date of all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.

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