Quarterly report pursuant to Section 13 or 15(d)

Derivative Financial Instruments And Hedging Activities (Current Or Noncurrent Derivative Assets And Liabilities) (Details)

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Derivative Financial Instruments And Hedging Activities (Current Or Noncurrent Derivative Assets And Liabilities) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2012
Dec. 31, 2011
Apr. 02, 2011
Derivative Financial Instruments And Hedging Activities [Abstract]      
Other current assets $ 23,874 $ 39,076 $ 16,936
Accrued current liabilities (13,315) (19,326) (50,265)
Other assets (noncurrent) 2,161 7,252 1,835
Other liabilities (noncurrent) $ (1,618) $ (4,187) $ (5,204)