Goodwill (Schedule of Goodwill) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Sep. 30, 2019	Mar. 31, 2020
Goodwill [Line Items]
Goodwill, Beginning Balance		$ 797,853
Impairment Charges	$ 0	(8,777)
Effects of Foreign Currency Translation		2,948
Goodwill, Ending Balance	797,853	792,024
Aerospace [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance		455,423
Impairment Charges
Effects of Foreign Currency Translation
Goodwill, Ending Balance	455,423	455,423
Industrial [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance		342,430
Impairment Charges		(8,777)
Effects of Foreign Currency Translation		2,948
Goodwill, Ending Balance	$ 342,430	$ 336,601

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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