Leases Supplemental Cash Flow Disclosures (Details) $ in Thousands	9 Months Ended
	Apr. 30, 2020 USD ($)
Lessee, Lease, Description [Line Items]
Operating cash flows related to operating leases	$ 22,035
Operating cash flows related to finance leases	46
Financing cash flows related to finance leases	748
Right-of-use assets obtained in exchange for new operating lease liabilities	25,301
Right-of-use assets obtained in exchange for new finance lease liabilities	$ 7,053