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Supplementary Balance Sheet Information Changes in Goodwill Amount (Details) - USD ($) $ in Thousands | 6 Months Ended |  |
--- | --- | --- | ---
Jan. 31, 2017 | Jul. 31, 2016 | Jan. 31, 2016
Goodwill [Line Items] |  |  |
Balance at July 31, 2016 | $ 1,469,756 | $ 509,037 | $ 506,957
Whistler Blackcomb acquisition | 956,086 |  |
Effects of changes in foreign currency exchange rates | 4,633 |  |
Mountain [Member] |  |  |
Goodwill [Line Items] |  |  |
Balance at July 31, 2016 | 1,401,857 | 441,138 |
Effects of changes in foreign currency exchange rates | 4,633 |  |
Lodging [Member] |  |  |
Goodwill [Line Items] |  |  |
Balance at July 31, 2016 | 67,899 | $ 67,899 |
Whistler Blackcomb acquisition | 0 |  |
Effects of changes in foreign currency exchange rates | $ 0 |  |

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Definition Amount of increase (decrease) from foreign currency translation adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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