Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2019	Aug. 01, 2019	Jul. 31, 2019	Oct. 31, 2018
Amortization of the finance ROU assets	$ 2,438
Finance Lease, Interest Expense	8,509
Operating lease expense	10,037
Short-term lease expense1	2,353
Variable lease expense	843
Operating cash outflows for operating leases	11,218
Operating cash outflows for finance leases	1,049
Financing cash outflows for finance leases	$ 5,387
Operating Lease, Weighted Average Remaining Lease Term	10 years 10 months 24 days
Finance Lease, Weighted Average Remaining Lease Term	43 years 7 months 6 days
Operating Lease, Weighted Average Discount Rate, Percent	4.50%
Finance Lease, Weighted Average Discount Rate, Percent	10.00%
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year	$ 38,383
Lessee, Operating Lease, Liability, Payments, Due Year Two	44,188
Lessee, Operating Lease, Liability, Payments, Due Year Three	41,256
Lessee, Operating Lease, Liability, Payments, Due Year Four	36,656
Lessee, Operating Lease, Liability, Payments, Due Year Five	32,899
Lessee, Operating Lease, Liability, Payments, Due after Year Five	165,267
Lessee, Operating Lease, Liability, Payments, Due	358,649
Less amount representing interest	(92,331)
Operating Lease, Liability	266,318	$ 258,000
Finance Lease, Liability, Payments, Remainder of Fiscal Year	21,190
Finance Lease, Liability, Payments, Due Year Two	28,818
Finance Lease, Liability, Payments, Due Year Three	29,394
Finance Lease, Liability, Payments, Due Year Four	29,982
Finance Lease, Liability, Payments, Due Year Five	30,582
Finance Lease, Liability, Payments, Due after Year Five	1,805,047
Finance Lease, Liability, Payment, Due	1,945,013
Less amount representing interest	(1,603,309)
Finance Lease, Liability	341,704
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	35,100	34,900
Operating Lease, Right-of-Use Asset	229,709	$ 225,600	$ 0	$ 0
Canyons Obligation [Member]
Amortization of the finance ROU assets	58,500
Operating Lease, Right-of-Use Asset	$ 125,100
Maximum [Member]
Lessee Operating And Finance Lease Term	60 years
Minimum [Member]
Lessee Operating And Finance Lease Term	1 year