Segment Information (Summary of Consolidated Net Sales and Earnings by Segment) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Segment Reporting Information [Line Items]
Total net sales	$ 847,688	$ 800,663	$ 2,469,761	$ 2,137,496
Interest expense, net	(9,788)	(11,659)	(29,988)	(34,772)
Consolidated earnings before income taxes	122,096	105,738	352,440	177,728
Aerospace [Member]
Segment Reporting Information [Line Items]
Total net sales	517,560	480,531	1,475,828	1,313,233
Industrial [Member]
Segment Reporting Information [Line Items]
Total net sales	330,128	320,132	993,933	824,263
Operating Segments [Member] | Aerospace [Member]
Segment Reporting Information [Line Items]
Total net sales	517,560	480,531	1,475,828	1,313,233
Segment earnings (loss)	101,842	83,075	279,295	211,823
Operating Segments [Member] | Industrial [Member]
Segment Reporting Information [Line Items]
Total net sales	330,128	320,132	993,933	824,263
Segment earnings (loss)	59,717	58,197	191,842	107,170
Unallocated Corporate [Member]
Segment Reporting Information [Line Items]
Segment earnings (loss)	$ (29,675)	$ (23,875)	$ (88,709)	$ (106,493)