Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2018
Net operating loss carryback	$ 3,800
US Refundable Payroll Tax Credits	$ 9,600
Excess tax benefits related to stock-based compensation	(14.30%)	(7.10%)	(3.00%)
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations	$ 19,196	$ 18,577	$ 17,540
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions	16,754	16,654	$ 11,520
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	3,400
Unrecognized tax benefits, income tax penalties and interest accrued	6,900	6,200
Income tax examination, penalties and interest expense	(700)	$ 100		$ (1,100)
Operating Loss Carryforwards	48,200
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	4,200
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ 4,200
Impacts of the Tax Act and other legislative changes	0.00%	(3.20%)	0.00%
Foreign Refundable Payroll Tax Credits	$ 30,800	$ 8,500
Deferred Tax Assets, Capital Loss Carryforwards	2,700
Capital Loss Carryforward
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	2,700
State and Local Jurisdiction [Member]
Operating loss carryforwards, valuation allowance	3,900
Foreign Tax Authority [Member]
Operating Loss Carryforwards	3,900
Peak Resorts, Inc. [Member]
Operating Loss Carryforwards	$ 44,400