Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Jan. 02, 2021	Dec. 28, 2019
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 265,879	$ 249,532
Less: Accumulated depreciation	(130,724)	(121,333)
Property, plant and equipment, net	135,155	128,199
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	6,664	6,664
Building and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	85,434	77,860
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	113,500	112,046
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	17,374	14,799
Software [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	30,423	24,047
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 12,484	$ 14,116