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Leases Balance Sheet Presentation of Operating and Financing Lease Assets and Liabilities (Details) - USD ($)
$ in Thousands
Jan. 31, 2020
Jul. 31, 2019
Lessee, Lease, Description [Line Items]    
Operating lease right-of-use assets $ 104,360 $ 0
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] 1,406  
Lease Assets, net 105,766  
Current portion of operating lease liabilities 23,314 0
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List] 615  
Operating lease liabilities, net of current portion 81,906 $ 0
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] 800  
Lease liabilities $ 106,635