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Condensed Consolidated Statements Of Equity (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Statement of Stockholders' Equity [Abstract]
Income tax effect related to hedge derivative contract settlements reclassified into earnings from accumulated other comprehensive income	$ (6,944)	$ (14,928)
Income tax effect related to net change in derivative fair value	$ 0	$ 33,802

Tax effect of the income statement impact of the reclassification adjustment of accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges realized in net income. Also includes reclassification adjustments of an entity's share of an equity investee's deferred hedging gain (loss) realized in net income.

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- Definition

Tax effect of the change in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Also includes an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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