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Fair Value of Financial Instruments (Details 3) (Derivatives designated as hedging instruments [Member], USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Other assets, net [Member]
Fair value of derivative instruments in the condensed consolidated balance sheets
Derivatives assets designated as hedging instruments	$ 0	$ 0
Other long-term liabilities [Member]
Fair value of derivative instruments in the condensed consolidated balance sheets
Derivatives liabilities designated as hedging instruments	$ 237,739	$ 254,228

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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- Definition

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

+ References+ Details