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Selected Quarterly Financial Data (Unaudited) (Details Textual) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Jul. 31, 2015	Apr. 30, 2015	Oct. 31, 2014	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2013
Selected Quarterly Financial Data [Abstract]
Gain on sale of interest		$ 1,200	$ 75,100	$ 76,864
Severance	$ 200	$ 6,200		8,363
Other operating loss				$ (1,552)	$ 835	$ 9,251

X

- Definition

Other aggregate amounts of gains or losses resulting from operating activities not otherwise defined.

+ References

No definition available.

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- Definition

Amount of gain (loss) on sale or disposal of equity in securities of subsidiaries.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 942



-SubTopic 225



-Section S99



-Paragraph 1



-Subparagraph (13)(g)



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- Definition

Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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-Publisher FASB



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