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Joint Venture (Narrative) (Details) - Woodward and General Electric Joint Venture [Member] - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2019
Schedule of Equity Method Investments [Line Items] |  |  |
Agreement to Form Joint Venture, Execution Date | Jan. 04, 2016 |  |
Ownership interest, joint venture | 50.00% |  |
Other Liabilities [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Contract liabilities | $ 71,364 |  | $ 69,079
Other Assets [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Costs to fulfill a contract | 71,364 |  | $ 69,079
Sales [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Amortization of deferred income recognized as an increase to sales | 1,708 | $ 1,777 |
Reduction to sales related to royalties paid to joint venture | $ 7,234 | $ 9,182 |

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