Joint Venture (Accounts Receivable, Accounts Payable, and Other Assets Related to JV) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Sep. 30, 2023
Schedule Of Equity Method Investments [Line Items]
Accounts receivable	$ 483,696	$ 485,227
Accounts payable	253,398	234,328
Woodward and General Electric Joint Venture [Member]
Schedule Of Equity Method Investments [Line Items]
Other assets	19,683	16,028
Woodward and General Electric Joint Venture [Member] | Related Party [Member]
Schedule Of Equity Method Investments [Line Items]
Accounts receivable	3,978	3,666
Accounts payable	$ 8,025	$ 6,276