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Earnings Per Share - Additional Information (Detail)
3 Months Ended 9 Months Ended
Sep. 27, 2014
Sep. 28, 2013
Sep. 27, 2014
Sep. 28, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Stock options excluded from calculation of diluted earnings per share, antidilutive 0 149,000 0 149,000