Summary of Significant Accounting Policies (Allocation Of Stock-Based Compensation Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2015
Pre-tax stock-based compensation expense	$ 18,315	$ 17,025	$ 15,753
Less: benefit for income taxes	6,290	6,057	6,026
Net stock-based compensation expense	12,025	10,968	9,727
Mountain Operating Expense [Member]
Pre-tax stock-based compensation expense	14,969	13,404	11,841
Lodging Operating Expense [Member]
Pre-tax stock-based compensation expense	3,215	3,094	2,621
Real Estate Operating Expense [Member]
Pre-tax stock-based compensation expense	$ 131	$ 527	$ 1,291