Leases - Summary of Balances Related to Lease Portfolio within Condensed Consolidated Statement of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 27, 2020	Sep. 29, 2019	Sep. 27, 2020	Sep. 29, 2019
Lessee Disclosure [Line Items]
Total lease cost	$ 12,253	$ 10,883	$ 33,756	$ 30,305
Cost of sales
Lessee Disclosure [Line Items]
Operating lease costs	1,397	1,356	4,167	4,039
Short-term and variable leases	3,711	2,814	9,368	7,393
Depreciation expense from financing leases	643	353	1,350	1,060
Total lease cost	5,751	4,523	14,885	12,492
SD&A expenses
Lessee Disclosure [Line Items]
Operating lease costs	4,846	3,717	14,225	9,639
Short-term and variable leases	271	838	1,612	2,676
Depreciation expense from financing leases	772	1,139	1,914	3,415
Total lease cost	5,889	5,694	17,751	15,730
Interest expense, net
Lessee Disclosure [Line Items]
Interest expense on financing lease obligations	613	666	1,120	2,083
Total lease cost	$ 613	$ 666	$ 1,120	$ 2,083