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Supplementary Balance Sheet Information Schedule of Goodwill (Details) - USD ($) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Oct. 31, 2018 | Jul. 31, 2018 | Oct. 31, 2017
Goodwill [Line Items] |  |  |
Goodwill | $ 1,543,941 | $ 1,475,686 | $ 1,484,335
Goodwill, Acquired During Period | 81,270 |  |
Effects of changes in foreign currency exchange rates | (13,015) |  |
Mountain [Member] |  |  |
Goodwill [Line Items] |  |  |
Goodwill | 1,476,042 | 1,407,787 |
Goodwill, Acquired During Period | 81,270 |  |
Effects of changes in foreign currency exchange rates | (13,015) |  |
Lodging [Member] |  |  |
Goodwill [Line Items] |  |  |
Goodwill | $ 67,899 | $ 67,899 |

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