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Segment Information (Summary of Consolidated Net Sales and Earnings by Segment) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
Segment Reporting Information [Line Items]
Total net sales	$ 883,629	$ 835,343	$ 1,656,354	$ 1,622,073
Interest Expense, net	(10,868)	(10,237)	(21,832)	(20,200)
Consolidated earnings before income taxes	132,963	120,624	234,817	230,344
Aerospace [Member]
Segment Reporting Information [Line Items]
Total net sales	561,729	497,512	1,055,611	958,268
Industrial [Member]
Segment Reporting Information [Line Items]
Total net sales	321,900	337,831	600,743	663,805
Operating Segments [Member] | Aerospace [Member]
Segment Reporting Information [Line Items]
Total net sales	561,729	497,512	1,055,611	958,268
Segment earnings (loss)	124,616	98,451	219,341	177,453
Operating Segments [Member] | Industrial [Member]
Segment Reporting Information [Line Items]
Total net sales	321,900	337,831	600,743	663,805
Segment earnings (loss)	45,967	65,244	86,164	132,125
Unallocated Corporate [Member]
Segment Reporting Information [Line Items]
Segment earnings (loss)	$ (26,752)	$ (32,834)	$ (48,856)	$ (59,034)

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