Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2021	Jan. 31, 2020	Jul. 31, 2020
Season Pass Credit Deferral Revenue			$ 15,400		$ 120,900
Accounts Receivable, after Allowance for Credit Loss, Current	$ 117,012	$ 105,325	117,012	$ 105,325	106,664
Deferred Revenue, Current	480,353	426,672	480,353	426,672	$ 256,402
Mountain Revenue Net	641,455	845,545	736,169	1,026,377
Lodging Revenue Net	42,874	78,887	79,692	161,645
Resort net revenue	684,329	924,432	815,861	1,188,022
Real Estate Revenue	315	206	569	4,386
Revenues	684,644	924,638	816,430	1,192,408
Contract with Customer, Liability, Revenue Recognized	100,300		136,100
Lift
Mountain Revenue Net	430,775	484,348	463,866	526,177
Ski School
Mountain Revenue Net	56,390	102,743	58,434	111,277
Dining
Mountain Revenue Net	31,810	75,719	34,878	97,348
Lodging Revenue Net	2,865	11,111	3,958	29,254
Retail/Rental
Mountain Revenue Net	90,126	133,713	112,432	181,628
Other
Mountain Revenue Net	32,354	49,022	66,559	109,947
Owned hotel rooms
Lodging Revenue Net	6,708	11,251	14,073	31,197
Managed condominium rooms
Lodging Revenue Net	20,336	31,500	29,665	46,240
Transportation
Lodging Revenue Net	2,947	7,725	2,947	10,076
Golf
Lodging Revenue Net	0	0	8,562	10,543
Other
Lodging Revenue Net	8,000	13,855	17,266	27,699
Lodging revenue (excluding payroll cost reimbursements) [Member]
Lodging Revenue Net	40,856	75,442	76,471	155,009
Payroll cost reimbursements
Lodging Revenue Net	$ 2,018	$ 3,445	$ 3,221	$ 6,636