Joint Venture (Accounts Receivable, Accounts Payable, and Other Assets Related to JV) (Details) - Woodward and General Electric Joint Venture [Member] - USD ($) $ in Thousands	Mar. 31, 2020	Sep. 30, 2019
Schedule of Equity Method Investments [Line Items]
Accounts receivable	$ 4,376	$ 5,906
Accounts payable	2,429	4,270
Other assets	$ 12,436	$ 7,543