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Components of Total Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Jul. 31, 2016 | Jul. 31, 2015 | Jul. 31, 2014 | Jul. 31, 2013
Schedule of Unrecognized Tax Benefits [Line Items] |  |  |  |
Unrecognized tax benefits | $ 13,269 | $ 13,156 | $ 20,813 | $ 32,733
Reduction to unrecognized tax benefits for tax credit carry forward | (2,255) | (2,109) | (657) |
Accrued interest and penalties | 1,547 | 1,895 | 5,200 |
Total unrecognized tax benefits | 12,561 | 12,942 | 25,356 |
Short-term, included in "Income and other taxes" | 2,586 | 997 | 1,667 |
Long-term | 9,975 | 11,945 | 23,689 |
Total unrecognized tax benefits | $ 12,561 | $ 12,942 | $ 25,356 |

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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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