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Taxes (Details 3) (USD $)
 12 Months Ended
Dec. 29, 2012
Dec. 31, 2011
Jan. 01, 2011
Income tax contingency      
Deferred income tax expense $ 6,858,000 $ 21,480,000 $ 15,352,000
U.S. income tax
      
Income tax contingency      
Tax benefit from exercise of non-qualified stock options and stock appreciation rights and vesting of restricted stock and restricted stock units 15,100,000 11,200,000 12,500,000
Foreign income tax
      
Income tax contingency      
Tax benefit from exercise of non-qualified stock options and stock appreciation rights and vesting of restricted stock and restricted stock units $ 500,000 $ 1,700,000 $ 1,700,000