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Description of Business and Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2020	Jan. 31, 2019	Jul. 31, 2019
Disaggregation of Revenue [Line Items]
Service revenues and vehicle sales:	$ 575,140	$ 484,898	$ 1,129,564	$ 946,266
Cumulative Translation Adjustment Summary [Roll Forward]
Cumulative loss on foreign currency translation, beginning balance			(132,529)	(107,928)	$ (107,928)
(Loss) Gain on foreign currency translation			12,659		(24,601)
Cumulative loss on foreign currency translation, ending balance	(119,870)		(119,870)		$ (132,529)
Service revenues
Disaggregation of Revenue [Line Items]
Service revenues and vehicle sales:	510,034	416,807	997,890	811,613
Vehicle sales
Disaggregation of Revenue [Line Items]
Service revenues and vehicle sales:	$ 65,106	$ 68,091	$ 131,674	$ 134,653

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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.

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