Goodwill and Intangible Assets - Schedule of Goodwill (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
Balance at beginning of period	$ 65,999	$ 28,146
Goodwill acquired	6,800	37,853
Measurement period adjustment	(193)
Balance at end of period	$ 72,606	$ 65,999