Leases - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 29, 2019	Jun. 29, 2019	Dec. 30, 2018
Lease expense	$ 1,500	$ 3,000
Operating Lease, Liability	41,554	41,554
Lease, cost	1,200	2,300
Short-term lease expense	300	700
Operating lease right of use asset	$ 36,779	$ 36,779
Accounting Standards Update 2016-02 [Member]
Operating Lease, Liability			$ 31,500
Operating lease right of use asset			$ 27,000