Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Dec. 30, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 179,266	$ 171,774
Less: Accumulated depreciation	(95,133)	(87,565)
Property, plant and equipment, net	84,133	84,209
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	6,298	6,298
Building and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	53,703	51,681
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	79,015	79,421
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	12,914	11,415
Software [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	19,989	16,640
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 7,347	$ 6,319