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Summary of Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2011
Cumulative Translation Adjustment Summary [Roll Forward]
Cumulative loss on foreign currency translation, Begining balance	$ (34,933)	$ (23,225)
Loss on foreign currency translation	(10,487)	(11,708)	9,516
Cumulative loss on foreign currency translation, Ending balance	$ (45,420)	$ (34,933)	$ (23,225)

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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