Net Income Per Share - Schedule of Reconciliation of Basic and Diluted Share Counts (Detail) - shares	3 Months Ended		6 Months Ended
	Jul. 01, 2015	Jun. 25, 2014	Jul. 01, 2015	Jun. 25, 2014
Earnings Per Share [Abstract]
Weighted-average shares outstanding—basic	37,812,767	28,715,485	37,618,756	28,714,053
Dilutive effect of stock options and restricted shares	1,272,439	1,656,796	1,384,218	1,881,512
Weighted-average shares outstanding—diluted	39,085,206	30,372,281	39,002,974	30,595,565