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Earnings Per Share - Additional Information (Detail) (Stock Options [Member])
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 27, 2014
Sep. 28, 2013
Sep. 27, 2014
Sep. 28, 2013
Stock Options [Member]
       
Stockholders Equity Note [Line Items]        
Antidilutive securities excluded from the computation of EPS 310 0 736 569