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Joint Venture (Net Sales to the JV) (Details) - USD ($) $ in Thousands | 3 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Woodward and General Electric Joint Venture [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Net sales | [1] | $ 14,878 | $ 12,833
[1] | Woodward recorded a reduction to sales of $7,234 for the three-months ended December 31, 2019 related to royalties paid to the JV by Woodward on sales by Woodward directly to third party aftermarket customers, compared to a reduction to sales of $9,182 for the three-months ended December 31, 2018.

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