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Revenue (Schedule of Disaggregation of Revenue) (Details) - USD ($) $ in Thousands | 3 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Disaggregation Of Revenue [Line Items] |  |
Total net sales | $ 541,586 | $ 537,619
Aerospace [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Total net sales | 336,435 | 321,667
Aerospace [Member] | Commercial OEM [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Total net sales | 104,826 | 76,081
Aerospace [Member] | Commercial Aftermarket [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Total net sales | 86,086 | 65,515
Aerospace [Member] | Defense OEM [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Total net sales | 105,375 | 131,263
Aerospace [Member] | Defense Aftermarket [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Total net sales | 40,148 | 48,808
Industrial [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Total net sales | 205,151 | 215,952
Industrial [Member] | Reciprocating Engines [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Total net sales | 158,334 | 164,922
Industrial [Member] | Industrial Turbines [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Total net sales | $ 46,817 | $ 51,030

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