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Inventories
3 Months Ended
Mar. 30, 2024
Notes To Financial Statements [Abstract]  
Inventories Inventories
Inventories are composed of material, labor and overhead and are stated at the lower of cost or net realizable value. Costs for inventory have been determined using the first-in, first-out ("FIFO") method. The company estimates reserves for inventory obsolescence and shrinkage based on its judgment of future realization. Inventories at March 30, 2024 and December 30, 2023 are as follows (in thousands): 
 Mar 30, 2024Dec 30, 2023
Raw materials and parts$498,418 $495,488 
Work-in-process80,496 80,102 
Finished goods364,765 360,277 
 $943,679 $935,867