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Joint Venture (Narrative) (Details) - Woodward and General Electric Joint Venture [Member] - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2018
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Agreement to Form Joint Venture, Execution Date |  |  | Jan. 04, 2016 |  |
Ownership interest, joint venture |  |  | 50.00% |  |
Cash received annually from formation of joint venture | $ 4,894 | $ 4,894 | $ 4,894 |  |
Other Liabilities [Member] |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Contract liabilities |  |  | 70,618 | $ 69,079 |
Reduction in contract liabilities and costs to fulfill contract |  |  | 6,609 | 2,790 |
Other Assets [Member] |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Costs to fulfill a contract |  |  | 70,618 | 69,079 |
Reduction in contract assets and costs to fulfill contract |  |  | 6,261 | 2,774 |
Sales [Member] |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |
Amortization of deferred income recognized as an increase to sales |  |  | 5,493 | 7,652 | $ 5,854
Reduction to sales related to royalties owed to joint venture |  |  | $ 23,904 | $ 34,236 | $ 26,023

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- Definition The annual cash inflow from the formation of a joint venture. The Company contributed certain contractual rights and intellectual property to the joint venture for which it had no cost basis. The joint venture partner paid the Company a lump sum and then will pay contingent consideration to the Company consisting of fiftenn annual payments for its ownership interest in the joint venture. + References No definition available. + Details
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