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Revenue (Schedule of Revenue Recognition Time) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Disaggregation Of Revenue [Line Items]
Net sales	$ 3,567,064	$ 3,324,249	$ 2,914,566
Aerospace [Member]
Disaggregation Of Revenue [Line Items]
Net sales	2,312,806	2,028,618	1,768,103
Industrial [Member]
Disaggregation Of Revenue [Line Items]
Net sales	1,254,258	1,295,631	1,146,463
Point In Time [Member]
Disaggregation Of Revenue [Line Items]
Net sales	1,629,298	1,634,522	1,456,736
Point In Time [Member] | Aerospace [Member]
Disaggregation Of Revenue [Line Items]
Net sales	916,671	853,728	748,278
Point In Time [Member] | Industrial [Member]
Disaggregation Of Revenue [Line Items]
Net sales	712,627	780,794	708,458
Over Time [Member]
Disaggregation Of Revenue [Line Items]
Net sales	1,937,766	1,689,727	1,457,830
Over Time [Member] | Aerospace [Member]
Disaggregation Of Revenue [Line Items]
Net sales	1,396,135	1,174,890	1,019,825
Over Time [Member] | Industrial [Member]
Disaggregation Of Revenue [Line Items]
Net sales	$ 541,631	$ 514,837	$ 438,005

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