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Derivative Financial Instruments (Details 1) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Apr. 02, 2011
Prepaid expenses and other current assets
   
Derivative Instruments located on Condensed Consolidated Balance sheet    
Asset Derivatives, Fair Value $ 183 $ 5,205
Other accrued liabilities
   
Derivative Instruments located on Condensed Consolidated Balance sheet    
Liability Derivatives, Fair Value $ 7,241 $ 71