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Property, Plant and Equipment (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2013
Property, Plant and Equipment [Abstract]
Impairment of building and improvements			$ 4,359
Carrying value of the land, building and improvements	$ 44,400	$ 37,700
Depreciation and amortization expense	$ 18,000	$ 15,700	$ 14,300

X

- Definition

Depreciation and amortization of property plant and equipment

+ References

No definition available.

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X

- Definition

The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 958



-SubTopic 225



-Section 45



-Paragraph 11



-Subparagraph (a)



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- Definition

Aggregate of the carrying amounts as of the balance sheet date of investments in building and building improvements.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 944



-SubTopic 210



-Section S99



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No definition available.

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