Segment Information (Summary of Consolidated Total Assets by Segment) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Sep. 30, 2021
Segment Reporting Information [Line Items]
Consolidated total assets	$ 3,890,544	$ 4,091,004
Property, plant and equipment, net	923,651	950,569
Other assets	303,175	297,024
Unallocated Corporate [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment, net	105,989	106,014
Other assets	588,184	832,734
Aerospace [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Consolidated total assets	1,740,309	1,698,833
Industrial [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Consolidated total assets	$ 1,456,062	$ 1,453,423