Net Income Per Share - Schedule of Reconciliation of Basic and Diluted Share Counts (Detail) - shares	3 Months Ended		6 Months Ended
	Jun. 29, 2016	Jul. 01, 2015	Jun. 29, 2016	Jul. 01, 2015
Earnings Per Share [Abstract]
Weighted-average shares outstanding—basic	38,294,575	37,812,767	38,289,505	37,618,756
Dilutive effect of stock options and restricted shares	668,227	1,272,439	692,105	1,384,218
Weighted-average shares outstanding—diluted	38,962,802	39,085,206	38,981,610	39,002,974