Segment Information (Summary of Consolidated Net Sales and Earnings by Segment) (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Total net sales	$ 786,730	$ 618,619
Interest expense, net	(9,963)	(10,776)
Consolidated earnings before income taxes	109,720	31,749
Aerospace [Member]
Segment Reporting Information [Line Items]
Total net sales	460,756	395,685
Industrial [Member]
Segment Reporting Information [Line Items]
Total net sales	325,974	222,934
Operating Segments [Member] | Aerospace [Member]
Segment Reporting Information [Line Items]
Total net sales	460,756	395,685
Segment earnings (loss)	79,002	55,434
Operating Segments [Member] | Industrial [Member]
Segment Reporting Information [Line Items]
Total net sales	325,974	222,934
Segment earnings (loss)	66,881	11,402
Unallocated Corporate [Member]
Segment Reporting Information [Line Items]
Segment earnings (loss)	$ (26,200)	$ (24,311)