Revenue (Schedule of Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation Of Revenue [Line Items]
Total net sales	$ 800,663	$ 614,332	$ 2,137,496	$ 1,742,757
Aerospace [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	480,531	401,712	1,313,233	1,110,904
Aerospace [Member] | Commercial OEM [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	186,173	131,968	484,319	359,683
Aerospace [Member] | Commercial Aftermarket [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	139,518	108,695	405,606	303,335
Aerospace [Member] | Defense OEM [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	101,008	115,205	278,577	318,392
Aerospace [Member] | Defense Aftermarket [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	53,832	45,844	144,731	129,494
Industrial [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	320,132	212,620	824,263	631,853
Industrial [Member] | Reciprocating Engines [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	242,040	154,090	612,655	469,087
Industrial [Member] | Industrial Turbines [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	$ 78,092	$ 58,530	$ 211,608	$ 162,766