Joint Venture (Net Sales to the JV) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Woodward and General Electric Joint Venture [Member]
Schedule Of Equity Method Investments [Line Items]
Net sales	[1]	$ 8,441	$ 7,026	$ 26,825	$ 38,511

[1] Net sales included a reduction of $3,944 for the three-months and $14,998 for the nine-months ended June 30, 2021 related to royalties owed to the JV by Woodward on sales by Woodward directly to third party aftermarket customers, compared to a reduction to sales of $2,292 for the three-months and $19,305 for the nine-months ended June 30, 2020.