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Intangible Assets and Goodwill - Goodwill (Details) - USD ($) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Oct. 31, 2021 | Oct. 31, 2020 | Jul. 31, 2021 | Jul. 31, 2020
Goodwill [Line Items] |  |  |  |
Goodwill | $ 1,915,388 | $ 1,481,283 | $ 1,563,255 | $ 1,476,541
Goodwill acquired | 373,685 | 17,882 |  |
Foreign currency translation | (21,552) | (13,140) |  |
Other |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill | 496,393 | 122,708 | 122,708 | 104,826
Goodwill acquired | 373,685 | 17,882 |  |
Foreign currency translation | 0 | 0 |  |
European | Recreational vehicles |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill | 1,020,145 | 1,024,789 | 1,041,697 | 1,037,929
Goodwill acquired | 0 | 0 |  |
Foreign currency translation | (21,552) | (13,140) |  |
North American Towables | North America | Recreational vehicles |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill | 344,975 | 333,786 | 344,975 | 333,786
Goodwill acquired | 0 | 0 |  |
Foreign currency translation | 0 | 0 |  |
North American Motorized | North America | Recreational vehicles |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill | 53,875 | 0 | $ 53,875 | $ 0
Goodwill acquired | 0 | 0 |  |
Foreign currency translation | $ 0 | $ 0 |  |

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