Goodwill (Narrative) (Details) - USD ($) $ in Thousands		12 Months Ended
Jul. 31, 2020	Sep. 30, 2020
Goodwill [Line Items]
Impairment charge		$ 8,640
Assumed annual compound growth rate after five years	3.44%
Percent premium from goodwill analysis on reporting units in aeropspace system	17.00%
Minimum [Member]
Goodwill [Line Items]
Weighted average cost of capital assumption	8.30%
Maximum [Member]
Goodwill [Line Items]
Weighted average cost of capital assumption	9.99%
Disposal Groups [Member]
Goodwill [Line Items]
Impairment charge		$ 8,640

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Annual compound growth rate after 5 years assumption used to calculate the terminal value of the forecasted cash flows for the annual goodwill impairment test.

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