Segment Information (Summary of Consolidated Total Assets by Segment) (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Consolidated total assets	$ 4,009,563	$ 3,806,446
Property, plant and equipment, net	910,544	910,472
Other assets	311,940	327,419
Unallocated Corporate [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment, net	104,417	111,760
Other assets	562,839	540,386
Aerospace [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Consolidated total assets	1,819,068	1,773,854
Industrial [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Consolidated total assets	$ 1,523,239	$ 1,380,446