Joint Venture (Net Sales to the JV) (Details) - USD ($) $ in Thousands		3 Months Ended
		Dec. 31, 2019	Dec. 31, 2018
Woodward and General Electric Joint Venture [Member]
Schedule of Equity Method Investments [Line Items]
Net sales	[1]	$ 14,878	$ 12,833

[1] Woodward recorded a reduction to sales of $7,234 for the three-months ended December 31, 2019 related to royalties paid to the JV by Woodward on sales by Woodward directly to third party aftermarket customers, compared to a reduction to sales of $9,182 for the three-months ended December 31, 2018.