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Weighted Average Number of Shares Outstanding Excluded from Computation of Diluted Earnings (Detail) (Stock Options And Restricted Stock Units)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 28, 2013
Sep. 29, 2012
Sep. 28, 2013
Sep. 29, 2012
Stock Options And Restricted Stock Units
       
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Stock options and stock units 219 1,012 612 1,015