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LEASES - Supplemental Cash Flow and Other Information (Details) - USD ($)
$ in Thousands
3 Months Ended
Oct. 31, 2020
Oct. 31, 2019
Leases [Abstract]    
Operating cash flows from operating leases $ 9,976 $ 8,750
Lease liabilities arising from obtaining right-of-use assets from operating leases $ 9,918 $ 12,969