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Derivative Instruments and Hedging Activities (Details 2) (USD $)	3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Effect of derivative instruments on the Consolidated Balance Sheet
Fair Value Asset		$ 3,019,000
Fair Value Liability	73,428,000	13,912,000
Unrealized losses included in accumulated other comprehensive income, pretax	73,400,000	10,900,000
Unrealized gain (loss) included in accumulated other comprehensive income, net of tax	(44,200,000)	6,600,000
Expected reclassification of income (loss) from commodity hedges over the next 9 months	44,200,000
Derivatives Designated as Hedging Instruments \| Commodity contracts \| Other current assets
Effect of derivative instruments on the Consolidated Balance Sheet
Fair Value Asset		3,019,000
Derivatives Designated as Hedging Instruments \| Commodity contracts \| Derivative instruments (current liabilities)
Effect of derivative instruments on the Consolidated Balance Sheet
Fair Value Liability	$ 73,428,000	$ 13,912,000

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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- Definition

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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