Revenue (Schedule of Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Disaggregation Of Revenue [Line Items]
Total net sales	$ 2,914,566	$ 2,382,790	$ 2,245,832
United States [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	1,538,075	1,311,600	1,278,123
Germany [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	273,842	232,056	183,696
Europe, excluding Germany [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	436,979	363,514	291,941
China [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	243,486	136,379	214,269
Asia, excluding China [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	200,029	152,189	137,500
Other Countries [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	222,155	187,052	140,303
Aerospace [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	1,768,103	1,519,322	1,404,117
Aerospace [Member] | United States [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	1,254,954	1,105,860	1,103,373
Aerospace [Member] | Germany [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	80,450	57,840	31,005
Aerospace [Member] | Europe, excluding Germany [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	163,222	128,719	95,984
Aerospace [Member] | China [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	56,773	49,407	35,286
Aerospace [Member] | Asia, excluding China [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	37,107	23,334	23,363
Aerospace [Member] | Other Countries [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	175,597	154,162	115,106
Aerospace [Member] | Commercial OEM [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	651,275	499,438	386,543
Aerospace [Member] | Commercial Aftermarket [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	547,625	420,881	306,547
Aerospace [Member] | Defense OEM [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	368,653	422,016	509,815
Aerospace [Member] | Defense Aftermarket [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	200,550	176,987	201,212
Industrial [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	1,146,463	863,468	841,715
Industrial [Member] | United States [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	283,121	205,740	174,750
Industrial [Member] | Germany [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	193,392	174,216	152,691
Industrial [Member] | Europe, excluding Germany [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	273,757	234,795	195,957
Industrial [Member] | China [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	186,713	86,972	178,983
Industrial [Member] | Asia, excluding China [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	162,922	128,855	114,137
Industrial [Member] | Other Countries [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	46,558	32,890	25,197
Industrial [Member] | Power Generation [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	382,536	317,026	292,470
Industrial [Member] | Transportation [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	527,498	354,682	399,002
Industrial [Member] | Oil and Gas [Member]
Disaggregation Of Revenue [Line Items]
Total net sales	$ 236,429	$ 191,760	$ 150,243