Leases - Additional Information (Detail) - USD ($)	6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019
Lessee Lease Description [Line Items]
Financing leases	$ 0
Cash paid for operating leases	4,000,000.0	$ 2,500,000
Portland, Tennessee [Member]
Lessee Lease Description [Line Items]
Operating lease right-of-use asset and lease liability	$ 6,400,000
Minimum [Member]
Lessee Lease Description [Line Items]
Operating lease remaining lease term	1 year
Maximum [Member]
Lessee Lease Description [Line Items]
Operating lease remaining lease term	11 years