Quarterly Results of Operations - Summary of Quarterly Results of Operations (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 26, 2015	Sep. 26, 2015	Jun. 27, 2015	Mar. 28, 2015	Dec. 27, 2014	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Dec. 26, 2015	Dec. 27, 2014	Dec. 28, 2013
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 204,834	$ 210,928	$ 198,721	$ 188,474	$ 173,981	$ 197,796	$ 196,187	$ 183,512	$ 802,957	$ 751,476	$ 664,466
Income from operations	34,370	41,240	36,895	33,652	28,611	38,476	36,700	36,947	146,157	140,734	127,939
Net income	$ 21,787	$ 26,060	$ 23,143	$ 21,339	$ 18,656	$ 24,536	$ 23,244	$ 23,551	$ 92,329	$ 89,987	$ 81,920
Diluted earnings per share	$ 0.62	$ 0.73	$ 0.65	$ 0.60	$ 0.52	$ 0.68	$ 0.64	$ 0.64	$ 2.60	$ 2.49	$ 2.24