Joint Venture (Accounts Receivable, Accounts Payable, and Other Assets Related to JV) (Details) - Woodward and General Electric Joint Venture [Member] - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Schedule Of Equity Method Investments [Line Items]
Accounts receivable	$ 3,526	$ 3,062
Accounts payable	4,534	1,502
Other assets	$ 8,288	$ 9,123

Amount for accounts payable to related parties. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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