Goodwill (Schedule of Goodwill) (Details) - USD ($) $ in Thousands	12 Months Ended
Sep. 30, 2021	Sep. 30, 2020
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 808,252	$ 797,853
Impairment Charges		(8,640)
Effects of Foreign Currency Translation	(2,919)	19,039
Goodwill, Ending Balance	805,333	808,252
Aerospace [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	455,423	455,423
Goodwill, Ending Balance	455,423	455,423
Industrial [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	352,829	342,430
Impairment Charges		(8,640)
Effects of Foreign Currency Translation	(2,919)	19,039
Goodwill, Ending Balance	$ 349,910	$ 352,829

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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