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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 consists of the following:
March 27,
2021		December 26,
2020
Land and improvements$3,422 $3,422 
Buildings and improvements51,479 51,479 
Machinery and equipment182,575 181,642 
Assets under construction762 1,167 
238,238 237,710 
Accumulated depreciation(182,259)(179,806)
Property, plant and equipment, net$55,979 $57,904 

Depreciation of property, plant and equipment, including amounts for finance leases, totaled $2,527 in the three months ended March 27, 2021 and $2,980 in the three months ended March 28, 2020.