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Derivative Instruments (Financial Information Related To Cash Flow Hedges) (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Jun. 30, 2012
Cash Flow Hedging [Member]
Jul. 02, 2011
Cash Flow Hedging [Member]
Derivative [Line Items]        
Unrealized losses on hedging transactions, Gross $ 4,017 $ 7,355 $ (3,338) $ (4,453)
Unrealized losses on hedging transactions, Income tax expense (benefit) 1,004 2,096 (1,092) (1,676)
Unrealized losses on hedging transactions, Net $ 3,013 $ 5,259 $ (2,246) $ (2,777)