Net Income Per Share - Schedule of Reconciliation of Basic and Diluted Share Counts (Detail) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 24, 2014	Sep. 30, 2015	Sep. 24, 2014
Earnings Per Share [Abstract]
Weighted-average shares outstanding—basic	38,275,317	34,221,829	37,837,610	30,549,979
Dilutive effect of stock options and restricted shares	831,924	2,599,266	1,206,778	1,900,252
Weighted-average shares outstanding—diluted	39,107,241	36,821,095	39,044,388	32,450,231