Joint Venture (Accounts Receivable, Accounts Payable, and Other Assets Related to JV) (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Sep. 30, 2023
Schedule Of Equity Method Investments [Line Items]
Accounts receivable	$ 441,964	$ 485,227
Accounts payable	255,391	234,328
Woodward and General Electric Joint Venture [Member]
Schedule Of Equity Method Investments [Line Items]
Other assets		16,028
Woodward and General Electric Joint Venture [Member] | Related Party [Member]
Schedule Of Equity Method Investments [Line Items]
Accounts receivable	4,510	3,666
Accounts payable	6,777	$ 6,276
Other assets	$ 19,172