Joint Venture (Net Sales to the JV) (Details) - USD ($) $ in Thousands		3 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
Woodward and General Electric Joint Venture [Member]
Schedule Of Equity Method Investments [Line Items]
Net sales	[1]	$ 10,059	$ 14,878

[1] Net sales included a reduction of $4,420 for the three-months ended December 31, 2020 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 $7,234 for the three-months ended December 31, 2019.