Segment Information (Summary of Consolidated Total Assets by Segment) (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Sep. 30, 2023
Segment Reporting Information [Line Items]
Consolidated total assets	$ 4,320,309	$ 4,010,203
Property, plant and equipment, net	917,730	913,094
Unallocated Corporate [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment, net	119,330	104,962
Other assets	800,353	585,490
Aerospace [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Consolidated total assets	1,913,483	1,829,410
Industrial [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Consolidated total assets	$ 1,487,143	$ 1,490,341