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Derivatives (Details Textual) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jul. 01, 2011
Jul. 02, 2010
Jul. 01, 2011
Jul. 02, 2010
Derivative Instruments, Gain (Loss) [Line Items]        
Gain on derivatives recognized in other comprehensive income, net of taxes (Effective portion) $ 2,812   $ 8,412  
Derivatives (Details Textual) [Abstract]        
Minimum percentage changes in fair value or cash flows hedged     80.00%  
Maximum percentage changes in fair value or cash flows hedged     125.00%  
Reclassification of pre-tax gains     6,717  
Amount by which the prior year gain on derivatives recognized in other comprehensive income was increased (decreased) to conform to the current period presentation   (4,546)   1,054
Scenario, Previously Reported [Member]
       
Derivative Instruments, Gain (Loss) [Line Items]        
Gain on derivatives recognized in other comprehensive income, net of taxes (Effective portion)   $ 7,358   $ 7,358