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Property, Plant, and Equipment (Schedule of Property Plant and Equipment, Net) (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Sep. 30, 2022
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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

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