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Earnings Per Share - Additional Information (Detail) - shares
shares in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Oct. 01, 2016
Sep. 30, 2017
Oct. 01, 2016
Earnings Per Share [Abstract]        
Anti-dilutive common stock equivalents excluded from the calculation of diluted earnings per share 1,862 1,921 1,230 1,448