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Goodwill and Intangible Assets - Amortizable Intangible Assets (Details) - USD ($)
$ in Thousands
Apr. 30, 2023
Jul. 31, 2022
Amortized intangibles:    
Accumulated amortization $ (42,506) $ (36,724)
Intangibles, net 49,676 54,680
Supply contracts and customer relationships    
Amortized intangibles:    
Gross carrying amount 72,580 71,875
Trade names    
Amortized intangibles:    
Gross carrying amount 18,919 18,896
Licenses and databases    
Amortized intangibles:    
Gross carrying amount $ 683 $ 633