Joint Venture (Net Sales to the JV) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Woodward and General Electric Joint Venture [Member]
Schedule of Equity Method Investments [Line Items]
Net sales	[1]	$ 16,606	$ 14,294	$ 31,484	$ 27,127

[1] Net sales include a reduction of $9,779 for the three-months and $17,013 for the six-months ended March 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 $9,069 for the three-months and $18,251 for the six-months ended March 31, 2019.