Revenue (Schedule of Revenue Recognition Time) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Disaggregation Of Revenue [Line Items]
Net sales	$ 2,914,566	$ 2,382,790	$ 2,245,832
Aerospace [Member]
Disaggregation Of Revenue [Line Items]
Net sales	1,768,103	1,519,322	1,404,117
Industrial [Member]
Disaggregation Of Revenue [Line Items]
Net sales	1,146,463	863,468	841,715
Point In Time [Member]
Disaggregation Of Revenue [Line Items]
Net sales	1,456,736	1,102,970	1,008,655
Point In Time [Member] | Aerospace [Member]
Disaggregation Of Revenue [Line Items]
Net sales	748,278	593,233	481,422
Point In Time [Member] | Industrial [Member]
Disaggregation Of Revenue [Line Items]
Net sales	708,458	509,737	527,233
Over Time [Member]
Disaggregation Of Revenue [Line Items]
Net sales	1,457,830	1,279,820	1,237,177
Over Time [Member] | Aerospace [Member]
Disaggregation Of Revenue [Line Items]
Net sales	1,019,825	926,089	922,695
Over Time [Member] | Industrial [Member]
Disaggregation Of Revenue [Line Items]
Net sales	$ 438,005	$ 353,731	$ 314,482