Equity - Additional Information (Detail) - USD ($) shares in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016	Nov. 21, 2013
Equity, Class of Treasury Stock [Line Items]
Stock repurchase authorized amount					$ 30,000,000
Stock repurchase remained available for future stock repurchase	$ 1,500,000		$ 1,500,000
Stock repurchased	0	0	0	0