Quarterly Results of Operations - Summary of Quarterly Results of Operations (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 29, 2018		Sep. 29, 2018		Jun. 30, 2018		Mar. 31, 2018		Dec. 30, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 260,341	[1]	$ 247,954	[1]	$ 238,147	[1]	$ 227,262	[1]	$ 227,719	$ 224,615	$ 229,262	$ 221,625	$ 973,705	$ 903,221	$ 859,604
Income from operations	44,637	[1]	43,733	[1]	42,780	[1]	39,994	[1]	43,409	42,790	44,999	45,042	171,143	176,240	168,601
Net income	$ 34,599		$ 34,017		$ 34,339		$ 30,647		$ 21,967	$ 27,008	$ 28,437	$ 29,187	$ 133,602	$ 106,599	$ 106,049
Diluted earnings per share	$ 1.05		$ 1.03		$ 1.03		$ 0.93		$ 0.65	$ 0.80	$ 0.83	$ 0.85	$ 4.02	$ 3.13	$ 3.07

[1] Quarterly information does not add to year to date information due to rounding