v3.26.1
Property, Plant, and Equipment (Schedule of Property Plant and Equipment, Net) (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Sep. 30, 2025
Property, Plant and Equipment [Line Items]    
Property, plant, and equipment, gross $ 2,081,073 $ 1,927,878
Less accumulated depreciation (993,309) (941,255)
Property, plant, and equipment, net 1,087,764 986,623
Land and Land Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant, and equipment, gross 109,229 95,172
Building and Building Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant, and equipment, gross 645,588 626,144
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant, and equipment, gross 15,452 15,900
Machinery and Production Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant, and equipment, gross 917,660 885,473
Computer Equipment and Software [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant, and equipment, gross 122,624 116,706
Office Furniture and Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant, and equipment, gross 44,323 43,312
Other [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant, and equipment, gross 33,575 33,591
Construction in Progress [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant, and equipment, gross $ 192,622 $ 111,580