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Inventories (Tables)
9 Months Ended
Oct. 02, 2021
Notes To Financial Statements [Abstract]  
Schedule of Inventory, Current Inventories at October 2, 2021 and January 2, 2021 are as follows (in thousands): 
 Oct 2, 2021Jan 2, 2021
Raw materials and parts$369,221 $263,200 
Work-in-process68,360 55,104 
Finished goods248,462 221,894 
 $686,043 $540,198