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Leases Balance Sheet Presentation of Operating and Financing Lease Assets and Liabilities (Details) - USD ($)
$ in Thousands
Oct. 31, 2019
Jul. 31, 2019
Lessee, Lease, Description [Line Items]    
Operating lease right-of-use assets $ 136,368 $ 0
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] 1,561  
Lease Assets, net 137,929  
Current portion of operating lease liabilities 27,055 0
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List] 590  
Operating lease liabilities, net of current portion 113,263 $ 0
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] 978  
Lease liabilities $ 141,886