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Summary of Significant Accounting Policies Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Jul. 31, 2021 | Jul. 31, 2020 | Jul. 31, 2019
Disaggregation of Revenue [Line Items] |  |  |
Service revenues and vehicle sales | $ 2,692,511 | $ 2,205,583 | $ 2,041,957
Contract with Customer, Asset, after Allowance for Credit Loss | 10,080 | 10,574 |
Increase (Decrease) in Contract with Customer, Asset | 265 | 2,875 |
Capitalized Contract Cost, Amortization | (3,188) | (3,541) |
Indefinite-lived Intangible Assets, Foreign Currency Translation Gain (Loss) | 328 | 172 |
Contract with Customer, Asset, after Allowance for Credit Loss | 7,485 | 10,080 | 10,574
Cumulative Translation Adjustment Summary [Roll Forward] |  |  |
Cumulative loss on foreign currency translation, Beginning balance | (121,088) | (132,529) |
Gain (loss) on foreign currency translation | 20,228 | 11,441 |
Cumulative loss on foreign currency translation, Ending balance | (100,860) | (121,088) | (132,529)
Service revenues |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Service revenues and vehicle sales | 2,291,867 | 1,947,140 | 1,755,694
Vehicle sales |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Service revenues and vehicle sales | $ 400,644 | $ 258,443 | $ 286,263

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