Segment Information (Summary of Consolidated Net Sales and Earnings by Segment) (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Total net sales	$ 772,725	$ 786,730
Interest Expense, net	(10,964)	(9,963)
Consolidated earnings before income taxes	101,854	109,720
Aerospace [Member]
Segment Reporting Information [Line Items]
Total net sales	493,882	460,756
Industrial [Member]
Segment Reporting Information [Line Items]
Total net sales	278,843	325,974
Operating Segments [Member] | Aerospace [Member]
Segment Reporting Information [Line Items]
Total net sales	493,882	460,756
Segment earnings (loss)	94,725	79,002
Operating Segments [Member] | Industrial [Member]
Segment Reporting Information [Line Items]
Total net sales	278,843	325,974
Segment earnings (loss)	40,197	66,881
Unallocated Corporate [Member]
Segment Reporting Information [Line Items]
Segment earnings (loss)	$ (22,104)	$ (26,200)