Segment Information (Summary of Consolidated Total Assets, Depreciation and Amortization, and Capital Expenditures by Segment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Consolidated total assets	$ 3,806,446	$ 4,091,004	$ 3,903,336
Property, plant and equipment, net	910,472	950,569
Other assets	327,419	297,024
Depreciation and amortization	120,628	129,524	131,158
Capital expenditures	52,868	37,689	47,087
Unallocated Corporate [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment, net	111,760	106,014	106,380
Other assets	540,386	832,734	515,029
Depreciation and amortization	9,868	10,564	10,184
Capital expenditures	17,216	5,222	10,308
Aerospace [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Consolidated total assets	1,773,854	1,698,833	1,752,516
Depreciation and amortization	60,176	62,075	63,530
Capital expenditures	23,253	17,303	26,148
Industrial [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Consolidated total assets	1,380,446	1,453,423	1,529,411
Depreciation and amortization	50,584	56,885	57,444
Capital expenditures	$ 12,399	$ 15,164	$ 10,631