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Note D - Property, Plant and Equipment - Summary of Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
Sep. 27, 2025
Sep. 28, 2024
Total Property, plant and equipment, at cost $ 1,009,463 $ 1,012,043
Less accumulated depreciation and amortization 619,310 620,858
Property, plant and equipment, net 390,153 391,185
Land [Member]    
Total Property, plant and equipment, at cost 3,684 3,684
Building [Member]    
Total Property, plant and equipment, at cost 127,022 122,919
Machinery and Equipment [Member]    
Total Property, plant and equipment, at cost 488,771 475,194
Equipment [Member]    
Total Property, plant and equipment, at cost 309,371 317,269
Transportation Equipment [Member]    
Total Property, plant and equipment, at cost 16,720 15,796
Office Equipment [Member]    
Total Property, plant and equipment, at cost 49,996 48,589
Construction in Progress [Member]    
Total Property, plant and equipment, at cost $ 13,899 $ 28,592