Income Taxes - Schedule of Components of Income Tax Expense (Benefit) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Current income tax expense:
United States	$ (1,137)	$ 64	$ 9,606
Other Nations	19,513	19,795	34,948
States (U.S.)	1,090	1,094	2,287
Total current income tax expense	19,466	20,953	46,841
Deferred income tax (benefit) expense:
United States	(22,754)	22,882	(1,480)
Other Nations	(1,803)	(806)	(7,325)
States (U.S.)	128	(446)	(874)
Total deferred income tax (benefit) expense	(24,429)	21,630	(9,679)
Income Tax Expense (Benefit), Continuing Operations	$ (4,963)	$ 42,583	$ 37,162