Joint Venture (Cash Distribution from JV) (Details) - USD ($) $ in Thousands	12 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Woodward and General Electric Joint Venture [Member]
Schedule Of Equity Method Investments [Line Items]
Cash distributions	$ 13,500	$ 14,000	$ 15,000

Amount of distribution received from equity method investee for return on investment, classified as operating activities. Excludes distribution for return of investment, classified as investing activities.

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