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Goodwill (Details) - USD ($)
$ in Thousands
12 Months Ended
Jul. 31, 2021
Jul. 31, 2020
Goodwill [Roll Forward]    
Beginning balance $ 343,622 $ 333,321
Acquisitions during the period 7,882 5,713
Effect of foreign currency exchange rates 4,213 4,588
Ending balance $ 355,717 $ 343,622