Property, Plant, and Equipment (Schedule of Property Plant and Equipment, Net) (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Sep. 30, 2023
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 1,786,909	$ 1,745,203
Less accumulated depreciation	(869,179)	(832,109)
Property, plant, and equipment, net	917,730	913,094
Land and Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	89,819	89,352
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	591,415	589,735
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	21,171	21,079
Machinery and Production Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	818,103	807,244
Computer Equipment and Software [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	119,684	120,290
Office Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	40,940	41,943
Other [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	38,182	20,073
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 67,595	$ 55,487