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Inventories (Tables)
12 Months Ended
Dec. 30, 2017
Inventory Disclosure [Abstract]  
Schedule of Inventories
(In thousands)
December 30, 2017
 
December 31, 2016
Work in progress
$
49,642

 
$
50,688

Finished goods
30,261

 
28,480

Total inventories
$
79,903

 
$
79,168