Revenue (Schedule of Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Disaggregation Of Revenue [Line Items]
Total net sales	$ 3,324,249	$ 2,914,566	$ 2,382,790
United States [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	1,698,256	1,538,075	1,311,600
Germany [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	269,358	273,842	232,056
Europe, excluding Germany [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	499,938	436,979	363,514
China [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	390,044	243,486	136,379
Asia, excluding China [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	222,706	200,029	152,189
Other Countries [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	243,947	222,155	187,052
Aerospace [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	2,028,618	1,768,103	1,519,322
Aerospace [Member] | United States [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	1,404,223	1,254,954	1,105,860
Aerospace [Member] | Germany [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	72,583	80,450	57,840
Aerospace [Member] | Europe, excluding Germany [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	202,421	163,222	128,719
Aerospace [Member] | China [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	96,136	56,773	49,407
Aerospace [Member] | Asia, excluding China [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	59,103	37,107	23,334
Aerospace [Member] | Other Countries [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	194,152	175,597	154,162
Aerospace [Member] | Commercial OEM [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	738,394	651,275	499,438
Aerospace [Member] | Commercial Aftermarket [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	640,823	547,625	420,881
Aerospace [Member] | Defense OEM [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	406,810	368,653	422,016
Aerospace [Member] | Defense Aftermarket [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	242,591	200,550	176,987
Industrial [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	1,295,631	1,146,463	863,468
Industrial [Member] | United States [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	294,033	283,121	205,740
Industrial [Member] | Germany [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	196,775	193,392	174,216
Industrial [Member] | Europe, excluding Germany [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	297,517	273,757	234,795
Industrial [Member] | China [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	293,908	186,713	86,972
Industrial [Member] | Asia, excluding China [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	163,603	162,922	128,855
Industrial [Member] | Other Countries [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	49,795	46,558	32,890
Industrial [Member] | Power Generation [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	423,872	382,536	317,026
Industrial [Member] | Transportation [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	642,174	527,498	354,682
Industrial [Member] | Oil and Gas [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	$ 229,585	$ 236,429	$ 191,760