Joint Venture (Narrative) (Details) - Woodward and General Electric Joint Venture [Member] - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 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	$ 971		$ 802		$ 3,142	$ 4,331
Reduction to sales related to royalties owed to joint venture	$ 3,944		$ 2,292		$ 14,998	$ 19,305