Segment Information (Summary of Consolidated Total Assets by Segment) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Sep. 30, 2021
Segment Reporting Information [Line Items]
Consolidated total assets	$ 4,035,240	$ 4,091,004
Property, plant and equipment, net	934,403	950,569
Other assets	301,332	297,024
Unallocated Corporate [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment, net	104,813	106,014
Other assets	803,911	832,734
Aerospace [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Consolidated total assets	1,680,730	1,698,833
Industrial [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Consolidated total assets	$ 1,445,786	$ 1,453,423