Property, Plant, and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Property, Plant and Equipment [Abstract]
Machinery, vehicles, and equipment	$ 127,242	$ 98,708
Buildings and storage tanks	71,616	69,791
Land	9,664	9,546
Leasehold improvements	6,523	5,701
Construction in progress	7,958	15,405
Assets held for sale	4	4
Total property, plant, and equipment	223,007	199,155
Less: accumulated depreciation	68,096	59,168
Property, plant, and equipment - net	154,911	139,987
Equipment at customers	77,914	73,075
Less: accumulated depreciation	53,682	49,261
Equipment at customers - net	24,232	23,814
Depreciation expense	$ 14,600	$ 13,100	$ 14,700