Property, Plant, and Equipment (Schedule of Property Plant and Equipment, Net) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Sep. 30, 2023
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 1,789,846	$ 1,745,203
Less accumulated depreciation	(858,593)	(832,109)
Property, plant, and equipment, net	931,253	913,094
Land and Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	90,073	89,352
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	591,776	589,735
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	21,707	21,079
Machinery and Production Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	817,319	807,244
Computer Equipment and Software [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	121,329	120,290
Office Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	42,931	41,943
Other [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	38,354	20,073
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 66,357	$ 55,487