Commitments and Contingencies (Future Minimum Lease Payment) (Details) - USD ($) $ in Thousands	Jul. 31, 2019	Jul. 31, 2018
Debt Instrument [Line Items]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$ 44,984
Operating Leases, Future Minimum Payments Due in Two Years	42,512
Operating Leases, Future Minimum Payments Due in Three Years	39,440
Operating Leases, Future Minimum Payments Due in Four Years	34,840
Operating Leases, Future Minimum Payments Due in Five Years	30,836
Operating Leases, Future Minimum Payments Due Thereafter	142,526
Operating Leases, Future Minimum 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)
Long-term Debt	1,580,130	$ 1,276,082
Canyons Obligation [Member]
Debt Instrument [Line Items]
Long-term Debt	$ 340,261	$ 334,509