Joint Venture (Accounts Receivable, Accounts Payable, and Other Assets Related to JV) (Details) - Woodward and General Electric Joint Venture [Member] - USD ($) $ in Thousands	Dec. 31, 2019	Sep. 30, 2019
Schedule of Equity Method Investments [Line Items]
Accounts receivable	$ 5,442	$ 5,906
Accounts payable	2,504	4,270
Other assets	$ 7,755	$ 7,543