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Supplementary Balance Sheet Information Schedule of Goodwill (Details) - USD ($) $ in Thousands | 9 Months Ended |  |
--- | --- | --- | ---
Apr. 30, 2021 | Jul. 31, 2020 | Apr. 30, 2020
Goodwill [Line Items] |  |  |
Goodwill | $ 1,801,296 | $ 1,709,020 | $ 1,673,258
Mountain [Member] |  |  |
Goodwill [Line Items] |  |  |
Goodwill | 1,759,085 | 1,666,809 |
Effects of changes in foreign currency exchange rates | 92,276 |  |
Lodging [Member] |  |  |
Goodwill [Line Items] |  |  |
Goodwill | $ 42,211 | $ 42,211 |

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