Property, Plant, and Equipment (Schedule of Property Plant and Equipment, Net) (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Sep. 30, 2022
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 1,733,094	$ 1,679,720
Less accumulated depreciation	(822,550)	(769,248)
Property, plant, and equipment, net	910,544	910,472
Land and Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	86,213	84,057
Building and Building Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	588,298	555,387
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	20,488	19,392
Machinery and Production Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	802,907	779,514
Computer Equipment and Software [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	119,484	122,670
Office Furniture and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	41,838	39,749
Other [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	20,125	20,162
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 53,741	$ 58,789