Earnings Per Share - Summary of Basic and Diluted Weighted-Average Shares Outstanding (Detail) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2016	Jul. 04, 2015	Jul. 02, 2016	Jul. 04, 2015
Earnings Per Share [Abstract]
Weighted average shares - Basic (in shares)	25,444	25,415	25,500	25,363
Net effect of dilutive stock options (in shares)	840	846	839	880
Weighted average shares - Diluted (in shares)	26,284	26,261	26,339	26,243
Number of shares out-of-the-money (in shares)			230