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Inventories
 12 Months Ended
Dec. 29, 2018
Inventory Disclosure [Abstract]  
Inventories
Inventories
 
The components of inventories at December 29, 2018 and December 30, 2017 are as follows:
 
(in thousands)
2018
 
2017
Raw materials
$
69,883

 
$
39,030

Work in process
88,505

 
27,454

Finished goods
99,840

 
74,305

Total
$
258,228


$
140,789