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Inventories
 6 Months Ended
Jun. 27, 2020
Inventory Disclosure [Abstract]  
Inventories Inventories
Inventories are stated at the lower of cost or net realizable value. Finished goods and work-in-process inventories include material, labor and manufacturing overhead costs.
(amounts in thousands)
June 27,
2020
 
December 31,
2019
Raw materials
$
388,863

 
$
372,289

Work in process
37,223

 
38,432

Finished goods
110,656

 
94,357

Total inventories
$
536,742

 
$
505,078