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Income Taxes (Details Textuals) (USD $)	12 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2011
Income Tax Disclosure [Abstract]
Valuation allowance	$ 1,597,000	$ 1,211,000
Unrecognized tax benefits that would impact effective tax rate	17,200,000	14,100,000
Interest and penalties related to income tax	5,900,000	5,600,000	6,000,000
Recognized tax benefit	6,100,000	4,400,000	3,500,000
Retained earnings, undistributed earnings from equity method investees	$ 80,000,000
Federal statutory rate	35.00%	35.00%	35.00%

X

- Definition

The gross amount of recognized tax benefits (tax reductions recognized in financial reports but excluded from tax returns).

+ References

No definition available.

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- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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- Definition

Amount of consolidated retained earnings that represent undistributed (not yet received) earnings from 50% or less owned persons accounted for by the equity method (equity method investees).

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 852

-SubTopic 20

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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