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Derivative Gains and Losses (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Apr. 30, 2020 | Apr. 30, 2019 | Apr. 30, 2020 | Apr. 30, 2019
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Foreign Currency Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net | $ 293 | $ 292 | $ 779 | $ 579
Cash Flow Hedging [Member] |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Net gain recognized in other comprehensive loss (income) | (1,751) | 220 | (1,192) | 377
Net Investment Hedging [Member] |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |
Net gain recognized in other comprehensive loss (income) | $ 707 | $ 1,314 | $ 1,260 | $ 2,336

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