Leases, Lease Cost (Details) $ in Thousands	12 Months Ended
	Jul. 31, 2020 USD ($)
Lessee, Lease, Description [Line Items]
Operating lease expense	$ 31,628
Amortization of right-of-use assets	882
Interest on finance lease liabilities	189
Short-term lease expense	8,555
Variable lease expense	1,635
Lease, Cost, Total	42,889
Present value of lease liabilities	1,317
Present value of lease liabilities	$ 120,405