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Derivative Financial Instruments - Amounts Recognized in Earnings (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 29, 2013
Jun. 30, 2012
Jun. 29, 2013
Jun. 30, 2012
Derivative Instruments and Hedging Activities Disclosure [Abstract]        
Net gain (loss) recognized in earnings $ 10,267 $ 12,410 $ 29,361 $ (8,108)