Segment Information (Summary of Consolidated Net Sales and Earnings by Segment) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Segment Reporting Information [Line Items]
Total net sales	$ 915,446	$ 847,688	$ 2,571,800	$ 2,469,761
Interest Expense, net	(10,396)	(9,788)	(32,228)	(29,988)
Consolidated earnings before income taxes	126,836	122,096	361,653	352,440
Aerospace [Member]
Segment Reporting Information [Line Items]
Total net sales	595,990	517,560	1,651,601	1,475,828
Industrial [Member]
Segment Reporting Information [Line Items]
Total net sales	319,456	330,128	920,199	993,933
Operating Segments [Member] | Aerospace [Member]
Segment Reporting Information [Line Items]
Total net sales	595,990	517,560	1,651,601	1,475,828
Segment earnings (loss)	125,740	101,842	345,081	279,295
Operating Segments [Member] | Industrial [Member]
Segment Reporting Information [Line Items]
Total net sales	319,456	330,128	920,199	993,933
Segment earnings (loss)	47,622	59,717	133,786	191,842
Unallocated Corporate [Member]
Segment Reporting Information [Line Items]
Segment earnings (loss)	$ (36,130)	$ (29,675)	$ (84,986)	$ (88,709)