Property, Plant, and Equipment (Schedule of Property Plant and Equipment, Net) (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Sep. 30, 2024
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 1,866,366	$ 1,830,959
Less accumulated depreciation	(924,263)	(890,244)
Property, plant, and equipment, net	942,103	940,715
Land and Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	91,876	91,105
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	617,341	599,897
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	20,511	22,022
Machinery and Production Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	863,497	849,595
Computer Equipment and Software [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	114,743	120,185
Office Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	43,935	42,873
Other [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	33,508	33,392
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 80,955	$ 71,890