Property, Plant, and Equipment (Schedule of Property Plant and Equipment, Net) (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Sep. 30, 2023
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 1,773,646	$ 1,745,203
Less accumulated depreciation	(852,291)	(832,109)
Property, plant, and equipment, net	921,355	913,094
Land and Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	89,899	89,352
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	591,225	589,735
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	21,445	21,079
Machinery and Production Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	808,980	807,244
Computer Equipment and Software [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	117,694	120,290
Office Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	41,303	41,943
Other [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	38,253	20,073
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 64,847	$ 55,487