Revenue (Schedule of Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Disaggregation Of Revenue [Line Items]
Total net sales	$ 718,214	$ 586,839	$ 1,336,833	$ 1,128,425
Aerospace [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	437,017	372,757	832,702	709,192
Aerospace [Member] | Commercial OEM [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	159,271	122,889	298,146	227,715
Aerospace [Member] | Commercial Aftermarket [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	139,445	108,554	266,088	194,640
Aerospace [Member] | Defense OEM [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	87,807	97,812	177,569	203,187
Aerospace [Member] | Defense Aftermarket [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	50,494	43,502	90,899	83,650
Industrial [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	281,197	214,082	504,131	419,233
Industrial [Member] | Reciprocating Engines [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	209,238	156,663	370,615	314,997
Industrial [Member] | Industrial Turbines [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	$ 71,959	$ 57,419	$ 133,516	$ 104,236