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Description of Business and Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Apr. 30, 2019 | Apr. 30, 2018 | Apr. 30, 2019 | Apr. 30, 2018 | Jul. 31, 2018
Disaggregation of Revenue [Line Items] |  |  |  |  |
Service revenues and vehicle sales: | $ 553,116 | $ 478,198 | $ 1,499,382 | $ 1,356,472 |
Cumulative Translation Adjustment Summary [Roll Forward] |  |  |  |  |
Cumulative loss on foreign currency translation, beginning balance |  |  | (107,928) | (100,676) | $ (100,676)
(Loss) Gain on foreign currency translation |  |  | (5,263) |  | (7,252)
Cumulative loss on foreign currency translation, ending balance | (113,191) |  | (113,191) |  | $ (107,928)
Service revenues |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Service revenues and vehicle sales: | 473,682 | 410,762 | 1,285,295 | 1,186,841 |
Vehicle sales |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Service revenues and vehicle sales: | $ 79,434 | $ 67,436 | $ 214,087 | $ 169,631 |

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- Definition Accumulated adjustment, net of tax, that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency from the functional currency of the reporting entity, net of reclassification of realized foreign currency translation gains or losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e637-108580 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e681-108580 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=109240241&loc=d3e32022-110900 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669646-108580 + Details
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