Description of Business and Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended
Oct. 31, 2018	Oct. 31, 2017
Disaggregation of Revenue [Line Items]
Service revenues and vehicle sales:	$ 461,368	$ 419,168
Cumulative Translation Adjustment Summary [Roll Forward]
Cumulative loss on foreign currency translation, beginning balance	(107,928)	(100,676)
(Loss) Gain on foreign currency translation	(7,718)	$ (7,252)
Cumulative loss on foreign currency translation, ending balance	$ (115,646)

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.

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Amount after tax, before reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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