Carrying Amount of Goodwill Allocated to Reportable Segments (Detail) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2013	Jul. 31, 2012
Goodwill [Line Items]
Beginning balance	$ 204,390	$ 204,390
Accumulated impairment charges	(201,332)	(201,332)
Ending balance	3,058	3,058
Americas
Goodwill [Line Items]
Beginning balance	94,477	94,477
Accumulated impairment charges	(94,477)	(94,477)
Asia
Goodwill [Line Items]
Beginning balance	73,948	73,948
Accumulated impairment charges	(73,948)	(73,948)
Europe
Goodwill [Line Items]
Beginning balance	30,108	30,108
Accumulated impairment charges	(30,108)	(30,108)
All Other
Goodwill [Line Items]
Beginning balance	5,857	5,857
Accumulated impairment charges	(2,799)	(2,799)
Ending balance	$ 3,058	$ 3,058

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 34

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 43

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 72

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+ Details