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Supplementary Balance Sheet Information Changes in Goodwill Amount (Details) - USD ($) $ in Thousands | 9 Months Ended |  |
--- | --- | --- | ---
Apr. 30, 2017 | Jul. 31, 2016 | Apr. 30, 2016
Goodwill [Line Items] |  |  |
Balance at July 31, 2016 | $ 1,430,008 | $ 509,037 | $ 509,083
Whistler Blackcomb acquisition | 956,876 |  |
Effects of changes in foreign currency exchange rates | (35,905) |  |
Mountain [Member] |  |  |
Goodwill [Line Items] |  |  |
Balance at July 31, 2016 | 1,362,109 | 441,138 |
Effects of changes in foreign currency exchange rates | (35,905) |  |
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 -Subparagraph (a) -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 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=64834752&loc=SL49117168-202975 + 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 (b) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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