Restructuring - Restructuring Reserve Roll Forward (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Apr. 30, 2015	Apr. 30, 2014	Apr. 30, 2015	Apr. 30, 2014
Restructuring Cost and Reserve [Line Items]
Beginning balance, July 31, 2014			$ 4,995us-gaap_RestructuringReserve	$ 14,206us-gaap_RestructuringReserve
Restructuring charges	4,834us-gaap_RestructuringCharges	3,039us-gaap_RestructuringCharges	13,991us-gaap_RestructuringCharges	14,202us-gaap_RestructuringCharges
Restructuring charges in discontinued operations			241	250
Non-cash write-offs			(3,541)	(267)
Cash payments			(11,518)us-gaap_PaymentsForRestructuring	(21,314)us-gaap_PaymentsForRestructuring
Ending balance, April 30, 2015	4,168us-gaap_RestructuringReserve	7,077us-gaap_RestructuringReserve	4,168us-gaap_RestructuringReserve	7,077us-gaap_RestructuringReserve
Asset Write Offs [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance, July 31, 2014			0	0
Restructuring charges	2,645	170	3,545	267
Restructuring charges in discontinued operations			(4)	0
Non-cash write-offs			(3,541)	(267)
Cash payments			0	0
Ending balance, April 30, 2015	0	0	0	0
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance, July 31, 2014			3,389	11,475
Restructuring charges	446	1,782	4,939	9,547
Restructuring charges in discontinued operations			0	250
Non-cash write-offs			0	0
Cash payments			(6,244)	(16,178)
Ending balance, April 30, 2015	2,084	5,094	2,084	5,094
Other Restructuring Cost [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance, July 31, 2014			1,606	2,731
Restructuring charges			5,507	4,388
Restructuring charges in discontinued operations			245	0
Non-cash write-offs			0	0
Cash payments			(5,274)	(5,136)
Ending balance, April 30, 2015	$ 2,084	$ 1,983	$ 2,084	$ 1,983

Restructuring Charges in Discontinued Operations

No definition available.

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- Definition

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

+ References

+ Details

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- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

-Section P

-Subsection 3, 4

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- Definition

Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 420

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SAB TOPIC 5.P.4(b))

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- Definition

Amount of consideration other than cash used to fully or partially settle an accrued restructuring cost.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 420

-SubTopic 10

-Section 50

-Paragraph 1

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

-Section P

-Subsection 3, 4

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-Topic 420

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-URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747

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