Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2021	Jul. 31, 2020
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$ 47,036
Finance Lease, Liability, Payments, Due in Next Rolling Twelve Months	29,394
Operating Lease, Payments	56,942	$ 55,344
Finance Lease, Right-of-Use Asset, Amortization	9,753	9,753
Finance Lease, Interest Expense	34,612	34,035
Operating Lease, Expense	43,418	43,303
Short-term Lease, Cost	13,638	13,943
Variable Lease, Cost	1,660	1,583
Operating Cash Outflows for Finance Leases	31,429	29,311
Financing Cash Outflows for Finance Leases	$ 0	$ 5,387
Operating Lease, Weighted Average Discount Rate, Percent	4.50%	4.50%
Finance Lease, Weighted Average Discount Rate, Percent	10.00%	10.00%
Operating Leases, Future Minimum Payments, Due in Two Years	$ 40,994
Finance Lease, Liability, to be Paid, Year Two	29,982
Operating Leases, Future Minimum Payments, Due in Three Years	36,452
Finance Lease, Liability, to be Paid, Year Three	30,582
Operating Leases, Future Minimum Payments, Due in Four Years	33,924
Finance Lease, Liability, to be Paid, Year Four	31,193
Operating Leases, Future Minimum Payments, Due in Five Years	30,362
Finance Lease, Liability, to be Paid, Year Five	31,817
Lessee, Operating Lease, Liability, to be Paid, after Year Five	109,063
Finance Lease, Liability, to be Paid, after Year Five	1,742,038
Lessee, Operating Lease, Liability, to be Paid	297,831
Finance Lease, Liability, Payment, Due	1,895,006
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(72,249)
Finance Lease, Liability, Undiscounted Excess Amount	(1,543,186)
Operating Lease, Liability	225,582
Finance Lease, Liability	351,820
Long-term Debt	2,948,514	$ 2,444,248
Operating Lease, Right-of-Use Asset	108,000	117,800
Finance Lease, Right-of-Use Asset, Accumulated Amortization	75,500	65,800
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 12,615	$ 18,013
Operating Lease, Weighted Average Remaining Lease Term	10 years 2 months 12 days	10 years 7 months 6 days
Finance Lease, Weighted Average Remaining Lease Term	41 years 10 months 24 days	42 years 10 months 24 days
Other Current Liabilities
Operating Lease, Liability	$ 34,700	$ 36,600
Minimum [Member]
Lessee Operating And Finance Lease Term	1 year
Maximum [Member]
Lessee Operating And Finance Lease Term	60 years
Canyons Obligation [Member]
Long-term Debt	$ 351,820	$ 346,034