Leases (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Apr. 30, 2020	Apr. 30, 2020	Aug. 01, 2019	Jul. 31, 2019	Apr. 30, 2019
Amortization of the finance ROU assets	$ 2,438	$ 7,314
Finance Lease, Interest Expense	8,509	25,526
Operating lease expense	10,815	32,496
Short-term lease expense1	3,235	11,116
Variable Lease, Income	$ (911)
Variable lease (credit) expense		1,270
Operating cash outflows for operating leases		48,252
Operating cash outflows for finance leases		22,245
Financing cash outflows for finance leases		$ 5,387
Operating Lease, Weighted Average Remaining Lease Term	10 years 8 months 12 days	10 years 8 months 12 days
Finance Lease, Weighted Average Remaining Lease Term	43 years 1 month 6 days	43 years 1 month 6 days
Operating Lease, Weighted Average Discount Rate, Percent	4.50%	4.50%
Finance Lease, Weighted Average Discount Rate, Percent	10.00%	10.00%
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	$ 9,287	$ 9,287
Lessee, Operating Lease, Liability, Payments, Due Year Two	45,370	45,370
Lessee, Operating Lease, Liability, Payments, Due Year Three	42,213	42,213
Lessee, Operating Lease, Liability, Payments, Due Year Four	37,371	37,371
Lessee, Operating Lease, Liability, Payments, Due Year Five	33,628	33,628
Lessee, Operating Lease, Liability, Payments, Due after Year Five	164,626	164,626
Lessee, Operating Lease, Liability, Payments, Due	332,495	332,495
Less amount representing interest	(88,234)	(88,234)
Operating Lease, Liability	244,261	244,261	$ 258,000
Finance Lease, Liability, Payments, Remainder of Fiscal Year	7,063	7,063
Finance Lease, Liability, Payments, Due Year Two	28,818	28,818
Finance Lease, Liability, Payments, Due Year Three	29,394	29,394
Finance Lease, Liability, Payments, Due Year Four	29,982	29,982
Finance Lease, Liability, Payments, Due Year Five	30,582	30,582
Finance Lease, Liability, Payments, Due after Year Five	1,805,048	1,805,048
Finance Lease, Liability, Payment, Due	1,930,887	1,930,887
Less amount representing interest	(1,586,296)	(1,586,296)
Finance Lease, Liability	344,591	344,591
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year				$ 44,984
Lessee, Operating Lease, Liability, Payments, Due Year Two				42,512
Lessee, Operating Lease, Liability, Payments, Due Year Three				39,440
Lessee, Operating Lease, Liability, Payments, Due Year Four				34,840
Lessee, Operating Lease, Liability, Payments, Due Year Five				30,836
Lessee, Operating Lease, Liability, Payments, Due after Year Five				142,526
Lessee, Operating Lease, Liability, Payments, Due				335,138
Capital Leases, Future Minimum Payments Due, Next Twelve Months				28,253
Capital Leases, Future Minimum Payments Due in Two Years				28,818
Capital Leases, Future Minimum Payments Due in Three Years				29,394
Capital Leases, Future Minimum Payments Due in Four Years				29,982
Capital Leases, Future Minimum Payments Due in Five Years				30,582
Capital Leases, Future Minimum Payments Due Thereafter				1,805,048
Capital Leases, Future Minimum Payments Due				1,952,077
Capital Leases, Future Minimum Payments, Interest Included in Payments				(1,611,816)
Capital Leases, Future Minimum Payments, Present Value of Net Minimum Payments				340,261
Operating Lease, Liability, Current	35,000	35,000	34,900
Operating Lease, Right-of-Use Asset	217,318	217,318	$ 225,600	$ 0	$ 0
Canyons Obligation [Member]
Amortization of the finance ROU assets		63,400
Operating Lease, Right-of-Use Asset	$ 120,200	$ 120,200
Maximum [Member]
Lessee Operating And Finance Lease Term		60 years
Minimum [Member]
Lessee Operating And Finance Lease Term		1 year