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Commitments and Contingencies (Details) - USD ($)
$ in Thousands
12 Months Ended
Jul. 31, 2019
Jul. 31, 2018
Jul. 31, 2017
Commitments and Contingencies Disclosure [Abstract]      
Operating Leases, Rent Expense $ 19,984 $ 15,938 $ 17,495
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]      
2020 18,450    
2021 16,132    
2022 13,439    
2023 10,065    
2024 5,656    
Thereafter 3,502    
Total future minimum payments due $ 67,244