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Property, Plant, and Equipment, net
 3 Months Ended
Mar. 27, 2021
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment, net Property, Plant and Equipment, net
Property, plant and equipment, net consisted of the following (in thousands):

March 27,
2021		December 26,
2020
Land$4,751 $4,751 
Machinery and equipment 233,357 226,185 
Computer equipment and software43,839 36,361 
Furniture and fixtures 6,925 6,894 
Leasehold improvements 80,011 79,144 
Sub-total 368,883 353,335 
Less: Accumulated depreciation and amortization (298,865)(294,468)
Net, property, plant and equipment 70,018 58,867 
Construction-in-process42,294 45,236 
Total$112,312 $104,103