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Schedule of Unrecognized Compensation Cost and Weighted Average Period of Recognition (Detail) - Jul. 31, 2015 - USD ($) $ in Thousands | Total
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Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |
Unrecognized Compensation Cost | $ 36,541
Weighted Average Years | 2 years 9 months 18 days
Stock Options |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |
Unrecognized Compensation Cost | $ 715
Weighted Average Years | 9 months 18 days
Stock Appreciation Rights (SARs) |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |
Unrecognized Compensation Cost | $ 981
Weighted Average Years | 1 year 8 months 12 days
Performance Stock Units |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |
Unrecognized Compensation Cost | $ 34,845
Weighted Average Years | 2 years 9 months 18 days
Restricted Stock Units (RSUs) |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |
Weighted Average Years |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Unrecognized cost of unvested share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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