Property, Plant and Equipment - Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Sep. 27, 2025	Dec. 31, 2024
Property, Plant and Equipment [Line Items]
Finance leases	$ 113,680	$ 5,167
Total property, plant and equipment	374,817	285,369
Less: accumulated depreciation and amortization	120,430	100,482
Property, plant and equipment, net	254,387	184,887
Manufacturing equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	154,884	165,626
Research and development equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	20,502	20,816
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	16,968	18,165
Building
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	29,545	27,155
Software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	2,685	2,742
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	903	941
Vehicles
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	595	594
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	5,544	5,416
Assets not yet placed in service
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 29,511	$ 38,747