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Derivative Instruments (Financial Information Related To Cash Flow Hedges) (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 29, 2012
Dec. 31, 2011
Sep. 29, 2012
Cash Flow Hedging [Member]
Oct. 01, 2011
Cash Flow Hedging [Member]
Derivative [Line Items]        
Unrealized losses on hedging transactions, Gross $ (1,244) $ 7,355 $ (8,599) $ 4,164
Unrealized losses on hedging transactions, Income tax expense (benefit) 311 (2,096) (2,407) 1,326
Unrealized losses on hedging transactions, Net $ (933) $ 5,259 $ (6,192) $ 2,838