Joint Venture (Net Sales to the 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]
Net sales	[1]	$ 35,957	$ 48,222	$ 60,955

[1] Net sales include a reduction of $21,101 for the fiscal year ended September 30, 2021, $23,904 for the fiscal year ended September 30, 2020, and $34,236 for the fiscal year ended September 30, 2019 related to royalties owed to the JV by Woodward on sales by Woodward directly to third party aftermarket customers.