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Leases Balance Sheet Presentation of Operating and Financing Lease Assets and Liabilities (Details) - USD ($)
$ in Thousands
Apr. 30, 2020
Jul. 31, 2019
Lessee, Lease, Description [Line Items]    
Operating lease right-of-use assets $ 106,634 $ 0
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] 8,128  
Lease Assets, net 114,762  
Current portion of operating lease liabilities 23,395 0
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List] 3,543  
Operating lease liabilities, net of current portion 85,698 $ 0
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] 4,496  
Lease liabilities $ 117,132