Joint Venture (Narrative) (Details) - Woodward and General Electric Joint Venture [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Schedule Of Equity Method Investments [Line Items]
Cash received annually from formation of joint venture	$ 4,894	$ 4,894
Sales [Member]
Schedule Of Equity Method Investments [Line Items]
Amortization of deferred income recognized as an increase to sales	989	1,821	$ 2,171	$ 3,529
Reduction to sales related to royalties owed to joint venture	$ 6,635	$ 9,779	$ 11,055	$ 17,013