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BUSINESS COMBINATIONS - Preliminary Aggregate Purchase Price Allocation (Details) - USD ($)
$ in Thousands
12 Months Ended
Aug. 24, 2018
Jul. 31, 2020
Jul. 31, 2019
Jul. 31, 2018
Business Acquisition [Line Items]        
Goodwill   $ 185,260 $ 185,180 $ 87,759
Amortizable intangible assets   $ 0 38,180  
Mainframe2, Inc.        
Business Acquisition [Line Items]        
Goodwill     97,328  
Amortizable intangible assets     38,180  
Tangible assets acquired     10,811  
Liabilities assumed     (16,293)  
Total consideration $ 130,000   $ 130,026