Revenue (Schedule of Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Disaggregation Of Revenue [Line Items]
Total net sales	$ 586,839	$ 581,321	$ 1,128,425	$ 1,118,940
Aerospace [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	372,757	364,706	709,192	686,373
Aerospace [Member] | Commercial OEM [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	122,889	101,907	227,715	177,988
Aerospace [Member] | Commercial Aftermarket [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	108,554	77,579	194,640	143,094
Aerospace [Member] | Defense OEM [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	97,812	135,630	203,187	266,893
Aerospace [Member] | Defense Aftermarket [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	43,502	49,590	83,650	98,398
Industrial [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	214,082	216,615	419,233	432,567
Industrial [Member] | Reciprocating Engines [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	156,663	163,034	314,997	327,956
Industrial [Member] | Industrial Turbines [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	$ 57,419	$ 53,581	$ 104,236	$ 104,611