Joint Venture (Narrative) (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Schedule Of Equity Method Investments [Line Items]
Revenue from contract liabilities			$ 44,398,000	$ 25,190,000
Cost of goods sold from contract assets			$ 2,447,770,000	2,236,983,000	$ 1,857,485,000
Woodward and General Electric Joint Venture [Member]
Schedule Of Equity Method Investments [Line Items]
Ownership interest, joint venture			50.00%
Cash received annually from formation of joint venture	$ 4,894,000	$ 4,894,000	$ 4,894,000
Revenue from contract liabilities			812,000	870,000
Cost of goods sold from contract assets			1,236,000	870,000
Reduction in contract liability and costs to fulfill contract			9,680,000	0
Reduction in costs to fulfill a contract related to the termination			9,680,000	0
Woodward and General Electric Joint Venture [Member] | Other Liabilities [Member]
Schedule Of Equity Method Investments [Line Items]
Contract liabilities			78,226,000	84,059,000
Woodward and General Electric Joint Venture [Member] | Other Assets [Member]
Schedule Of Equity Method Investments [Line Items]
Costs to fulfill a contract			78,226,000	84,059,000
Woodward and General Electric Joint Venture [Member] | Sales [Member]
Schedule Of Equity Method Investments [Line Items]
Amortization of deferred income recognized as an increase to sales			6,294,000	5,020,000	3,633,000
Reduction to sales related to royalties owed to joint venture			$ 63,794,000	$ 49,624,000	$ 28,054,000