Discontinued Operations Operating Results, Details (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Apr. 30, 2013	Apr. 30, 2014	Apr. 30, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on write-down of assets held for sale	$ (15,658)	$ 0	$ (15,658)
Accumulated Other Comprehensive Income Attributable to Disposal Group, Discontinued Operations		$ 31,000