Income Taxes (Summary of Unrecognized Tax Benefits) (Details) - USD ($)	12 Months Ended
Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2014
Activity Related to Unrecognized Tax Benefits [Roll Forward]
Beginning Balance	$ 2,728,000	$ 2,703,000	$ 2,873,000
Increase related to current period	2,487,000	410,000	374,000
Increase related to prior periods	4,490,000	144,000	20,000
Expiration of statute of limitations	(580,000)	(468,000)	(496,000)
Decrease related to prior periods	(17,000)	(61,000)	(68,000)
Ending Balance	$ 9,108,000	$ 2,728,000	$ 2,703,000

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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- Definition

Amount of unrecognized tax benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=65882285&loc=SL6600010-109319

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Unrecognized Tax Benefit
-URI http://asc.fasb.org/extlink&oid=6527854

+ Details

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- Definition

Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

+ References

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- Definition

Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

+ References

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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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- Definition

Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

+ References

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