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Property and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 02, 2021	Sep. 26, 2020	Oct. 02, 2021	Sep. 26, 2020	Jan. 02, 2021
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 426,081		$ 426,081		$ 406,647
Accumulated depreciation	(151,152)		(151,152)		(134,136)
Property and equipment, net	274,929		274,929		272,511
Depreciation	6,500	$ 5,800	18,800	$ 16,000
Building and building improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	141,990		141,990		122,310
Machinery, equipment and tooling
Property, Plant and Equipment [Line Items]
Total property and equipment	101,833		101,833		90,843
Land
Property, Plant and Equipment [Line Items]
Total property and equipment	56,938		56,938		57,151
Transportation, vehicles and other
Property, Plant and Equipment [Line Items]
Total property and equipment	33,114		33,114		33,175
Computer equipment and software
Property, Plant and Equipment [Line Items]
Total property and equipment	32,131		32,131		24,693
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	20,885		20,885		19,295
Furniture and office equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	14,186		14,186		13,567
Demonstration units
Property, Plant and Equipment [Line Items]
Total property and equipment	1,049		1,049		1,024
Construction-in-progress (CIP)
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 23,955		$ 23,955		$ 44,589

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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