The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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Property, Plant and Equipment, Net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 25, 2022	Jun. 26, 2021	Jun. 25, 2022	Jun. 26, 2021	Dec. 25, 2021
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 216,792		$ 216,792		$ 213,911
Accumulated depreciation	(169,114)		(169,114)		(165,253)
Property, plant and equipment, net	47,678		47,678		48,658
Depreciation	1,975	$ 3,974	2,200	$ 4,535
Land and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	3,422		3,422		3,422
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	51,430		51,430		51,430
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	158,457		158,457		158,248
Assets under construction
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 3,483		$ 3,483		$ 811