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Revenue (Schedule of Disaggregation of Revenue) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2020
Disaggregation Of Revenue [Line Items] |  |  |  |
Total net sales |  | $ 2,382,790 | $ 2,245,832 | $ 2,495,665
United States [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total net sales |  | 1,311,600 | 1,278,123 | 1,426,454
Germany [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total net sales |  | 232,056 | 183,696 | 233,965
Europe, excluding Germany [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total net sales |  | 363,514 | 291,941 | 336,971
China [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total net sales |  | 136,379 | 214,269 | 209,885
Asia, excluding China [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total net sales |  | 152,189 | 137,500 | 140,069
Other Countries [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total net sales |  | 187,052 | 140,303 | 148,321
Aerospace [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total net sales |  | 1,519,322 | 1,404,117 | 1,590,963
Aerospace [Member] | United States [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total net sales |  | 1,105,860 | 1,103,373 | 1,231,004
Aerospace [Member] | Germany [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total net sales |  | 57,840 | 31,005 | 52,635
Aerospace [Member] | Europe, excluding Germany [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total net sales |  | 128,719 | 95,984 | 122,938
Aerospace [Member] | China [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total net sales |  | 49,407 | 35,286 | 38,359
Aerospace [Member] | Asia, excluding China [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total net sales |  | 23,334 | 23,363 | 27,068
Aerospace [Member] | Other Countries [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total net sales |  | 154,162 | 115,106 | 118,959
Aerospace [Member] | Commercial OEM [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total net sales |  | 499,438 | 386,543 | 434,306
Aerospace [Member] | Commercial Aftermarket [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total net sales |  | 420,881 | 306,547 | 399,843
Aerospace [Member] | Defense OEM [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total net sales |  | 422,016 | 509,815 | 526,264
Aerospace [Member] | Defense Aftermarket [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total net sales |  | 176,987 | 201,212 | 230,550
Industrial [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total net sales |  | 863,468 | 841,715 | 904,702
Industrial [Member] | United States [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total net sales |  | 205,740 | 174,750 | 195,450
Industrial [Member] | Germany [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total net sales |  | 174,216 | 152,691 | 181,330
Industrial [Member] | Europe, excluding Germany [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total net sales |  | 234,795 | 195,957 | 214,033
Industrial [Member] | China [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total net sales |  | 86,972 | 178,983 | 171,526
Industrial [Member] | Asia, excluding China [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total net sales |  | 128,855 | 114,137 | 113,001
Industrial [Member] | Other Countries [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total net sales |  | 32,890 | 25,197 | 29,362
Industrial [Member] | Reciprocating Engines [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total net sales |  | 636,866 | 639,946 | 632,555
Industrial [Member] | Industrial Turbines [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total net sales |  | $ 226,602 | $ 201,769 | 222,366
Industrial [Member] | Renewables [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total net sales | [1] |  |  | $ 49,781
[1] | Sales in the renewables market were discontinued as of May 1, 2020 following the closing of the divestiture of the disposal group (see Note 10, Acquisitions and Divestitures).

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