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Inventories
3 Months Ended
Apr. 01, 2023
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 April 1, 2023 and December 31, 2022 are as follows (in thousands): 
 Apr 1, 2023Dec 31, 2022
Raw materials and parts$595,595 $595,325 
Work-in-process100,248 86,083 
Finished goods420,521 396,321 
 $1,116,364 $1,077,729