Revenue (Schedule of Disaggregation of Revenue) (Details) - USD ($) $ in Thousands		12 Months Ended
		Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Disaggregation Of Revenue [Line Items]
Total net sales		$ 2,382,790	$ 2,245,832	$ 2,495,665
United States [Member]
Disaggregation Of Revenue [Line Items]
Total net sales		1,311,600	1,278,123	1,426,454
Germany [Member]
Disaggregation Of Revenue [Line Items]
Total net sales		232,056	183,696	233,965
Europe, excluding Germany [Member]
Disaggregation Of Revenue [Line Items]
Total net sales		363,514	291,941	336,971
China [Member]
Disaggregation Of Revenue [Line Items]
Total net sales		136,379	214,269	209,885
Asia, excluding China [Member]
Disaggregation Of Revenue [Line Items]
Total net sales		152,189	137,500	140,069
Other Countries [Member]
Disaggregation Of Revenue [Line Items]
Total net sales		187,052	140,303	148,321
Aerospace [Member]
Disaggregation Of Revenue [Line Items]
Total net sales		1,519,322	1,404,117	1,590,963
Aerospace [Member] | United States [Member]
Disaggregation Of Revenue [Line Items]
Total net sales		1,105,860	1,103,373	1,231,004
Aerospace [Member] | Germany [Member]
Disaggregation Of Revenue [Line Items]
Total net sales		57,840	31,005	52,635
Aerospace [Member] | Europe, excluding Germany [Member]
Disaggregation Of Revenue [Line Items]
Total net sales		128,719	95,984	122,938
Aerospace [Member] | China [Member]
Disaggregation Of Revenue [Line Items]
Total net sales		49,407	35,286	38,359
Aerospace [Member] | Asia, excluding China [Member]
Disaggregation Of Revenue [Line Items]
Total net sales		23,334	23,363	27,068
Aerospace [Member] | Other Countries [Member]
Disaggregation Of Revenue [Line Items]
Total net sales		154,162	115,106	118,959
Aerospace [Member] | Commercial OEM [Member]
Disaggregation Of Revenue [Line Items]
Total net sales		499,438	386,543	434,306
Aerospace [Member] | Commercial Aftermarket [Member]
Disaggregation Of Revenue [Line Items]
Total net sales		420,881	306,547	399,843
Aerospace [Member] | Defense OEM [Member]
Disaggregation Of Revenue [Line Items]
Total net sales		422,016	509,815	526,264
Aerospace [Member] | Defense Aftermarket [Member]
Disaggregation Of Revenue [Line Items]
Total net sales		176,987	201,212	230,550
Industrial [Member]
Disaggregation Of Revenue [Line Items]
Total net sales		863,468	841,715	904,702
Industrial [Member] | United States [Member]
Disaggregation Of Revenue [Line Items]
Total net sales		205,740	174,750	195,450
Industrial [Member] | Germany [Member]
Disaggregation Of Revenue [Line Items]
Total net sales		174,216	152,691	181,330
Industrial [Member] | Europe, excluding Germany [Member]
Disaggregation Of Revenue [Line Items]
Total net sales		234,795	195,957	214,033
Industrial [Member] | China [Member]
Disaggregation Of Revenue [Line Items]
Total net sales		86,972	178,983	171,526
Industrial [Member] | Asia, excluding China [Member]
Disaggregation Of Revenue [Line Items]
Total net sales		128,855	114,137	113,001
Industrial [Member] | Other Countries [Member]
Disaggregation Of Revenue [Line Items]
Total net sales		32,890	25,197	29,362
Industrial [Member] | Reciprocating Engines [Member]
Disaggregation Of Revenue [Line Items]
Total net sales		636,866	639,946	632,555
Industrial [Member] | Industrial Turbines [Member]
Disaggregation Of Revenue [Line Items]
Total net sales		$ 226,602	$ 201,769	222,366
Industrial [Member] | Renewables [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	[1]			$ 49,781

[1] Sales in the renewables market were discontinued as of May 1, 2020 following the closing of the divestiture of the disposal group (see Note 10, Acquisitions and Divestitures).