Revenue (Schedule of Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Disaggregation Of Revenue [Line Items]
Total net sales	$ 847,688	$ 800,663	$ 2,469,761	$ 2,137,496
Aerospace [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	517,560	480,531	1,475,828	1,313,233
Aerospace [Member] | Commercial OEM [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	189,697	186,173	544,568	484,319
Aerospace [Member] | Commercial Aftermarket [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	165,718	139,518	467,148	405,606
Aerospace [Member] | Defense OEM [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	96,557	101,008	280,999	278,577
Aerospace [Member] | Defense Aftermarket [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	65,588	53,832	183,113	144,731
Industrial [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	330,128	320,132	993,933	824,263
Industrial [Member] | Power Generation [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	109,583	101,387	314,500	276,977
Industrial [Member] | Transportation [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	163,310	158,039	511,565	365,731
Industrial [Member] | Oil and Gas [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	$ 57,235	$ 60,706	$ 167,868	$ 181,555