Revenue (Schedule of Revenue Recognition Time) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Disaggregation Of Revenue [Line Items]
Net sales	$ 3,324,249	$ 2,914,566	$ 2,382,790
Aerospace [Member]
Disaggregation Of Revenue [Line Items]
Net sales	2,028,618	1,768,103	1,519,322
Industrial [Member]
Disaggregation Of Revenue [Line Items]
Net sales	1,295,631	1,146,463	863,468
Point In Time [Member]
Disaggregation Of Revenue [Line Items]
Net sales	1,634,522	1,456,736	1,102,970
Point In Time [Member] | Aerospace [Member]
Disaggregation Of Revenue [Line Items]
Net sales	853,728	748,278	593,233
Point In Time [Member] | Industrial [Member]
Disaggregation Of Revenue [Line Items]
Net sales	780,794	708,458	509,737
Over Time [Member]
Disaggregation Of Revenue [Line Items]
Net sales	1,689,727	1,457,830	1,279,820
Over Time [Member] | Aerospace [Member]
Disaggregation Of Revenue [Line Items]
Net sales	1,174,890	1,019,825	926,089
Over Time [Member] | Industrial [Member]
Disaggregation Of Revenue [Line Items]
Net sales	$ 514,837	$ 438,005	$ 353,731