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Earnings Per Share - Additional Information (Detail)
3 Months Ended
Mar. 28, 2015
Mar. 29, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Stock options excluded from calculation of diluted earnings per share, antidilutive 0us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 0us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount