Revenues (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jul. 31, 2020	Apr. 30, 2020	Jan. 31, 2020	Oct. 31, 2019	Jul. 31, 2019	Apr. 30, 2019	Jan. 31, 2019	Oct. 31, 2018	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2018
Disaggregation of Revenue [Line Items]
Season Pass Credit Deferral Revenue									$ 120,900
Accounts Receivable, after Allowance for Credit Loss, Current	$ 106,664				$ 270,896				106,664	$ 270,896
Mountain Revenue Net									1,710,443	1,956,201	$ 1,722,922
Lodging									248,414	314,662	284,643
Resort net revenue									1,958,857	2,270,863	2,007,565
Real Estate									4,847	712	3,988
Revenues	$ 77,209	$ 694,087	$ 924,638	$ 267,770	$ 244,006	$ 957,987	$ 849,578	$ 220,004	1,963,704	2,271,575	2,011,553
Season Pass Credit Deferral Costs									2,900
Dining
Disaggregation of Revenue [Line Items]
Lodging									38,252	53,730	48,554
Owned hotel rooms
Disaggregation of Revenue [Line Items]
Lodging									44,992	64,826	65,252
Managed condominium rooms
Disaggregation of Revenue [Line Items]
Lodging									76,480	86,236	70,198
Transportation
Disaggregation of Revenue [Line Items]
Lodging									15,796	21,275	21,111
Golf
Disaggregation of Revenue [Line Items]
Lodging									17,412	19,648	18,110
Other
Disaggregation of Revenue [Line Items]
Lodging									44,933	54,617	47,577
Lodging revenue (excluding payroll cost reimbursements) [Member]
Disaggregation of Revenue [Line Items]
Lodging									237,865	300,332	270,802
Payroll cost reimbursements
Disaggregation of Revenue [Line Items]
Lodging									10,549	14,330	13,841
Other | Other
Disaggregation of Revenue [Line Items]
Mountain Revenue Net									177,159	205,803	194,851
Retail/Rental | Retail/Rental
Disaggregation of Revenue [Line Items]
Mountain Revenue Net									270,299	320,267	296,466
Dining | Dining
Disaggregation of Revenue [Line Items]
Mountain Revenue Net									160,763	181,837	161,402
Ski School | Ski School
Disaggregation of Revenue [Line Items]
Mountain Revenue Net									189,131	215,060	189,910
Lift | Lift
Disaggregation of Revenue [Line Items]
Mountain Revenue Net									$ 913,091	$ 1,033,234	$ 880,293