Joint Venture (Accounts Receivable, Accounts Payable, and Other Assets Related to JV) (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Sep. 30, 2023
Schedule Of Equity Method Investments [Line Items]
Accounts receivable	$ 530,127	$ 485,227
Accounts payable	258,670	234,328
Woodward and General Electric Joint Venture [Member]
Schedule Of Equity Method Investments [Line Items]
Other assets	16,384	16,028
Woodward and General Electric Joint Venture [Member] | Related Party [Member]
Schedule Of Equity Method Investments [Line Items]
Accounts receivable	5,279	3,666
Accounts payable	$ 7,324	$ 6,276