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Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jul. 31, 2023
Jul. 31, 2022
Jul. 31, 2021
Disaggregation of Revenue [Line Items]      
Service revenues and vehicle sales $ 3,869,518 $ 3,500,921 $ 2,692,511
Service revenues      
Disaggregation of Revenue [Line Items]      
Service revenues and vehicle sales 3,198,128 2,853,040 2,291,867
Service revenues | United States | United States      
Disaggregation of Revenue [Line Items]      
Service revenues and vehicle sales 2,841,641 2,533,165 2,017,504
Service revenues | International | International      
Disaggregation of Revenue [Line Items]      
Service revenues and vehicle sales 356,487 319,875 274,363
Vehicle sales      
Disaggregation of Revenue [Line Items]      
Service revenues and vehicle sales 671,390 647,881 400,644
Vehicle sales | United States | United States      
Disaggregation of Revenue [Line Items]      
Service revenues and vehicle sales 348,007 411,985 254,568
Vehicle sales | International | International      
Disaggregation of Revenue [Line Items]      
Service revenues and vehicle sales $ 323,383 $ 235,896 $ 146,076