Stock Options Transactions (Detail) - Stock Options $ / shares in Units, shares in Thousands, $ in Thousands |
6 Months Ended |
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Oct. 31, 2015
USD ($)
$ / shares
shares
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| Options | |
| Outstanding, April 30, 2015 | shares | 202 |
| Exercised | shares | (81) |
| Forfeited/expired. | shares | (5) |
| Outstanding, October 31, 2015 | shares | 116 |
| Exercisable, October 31, 2015 | shares | 116 |
| Weighted Average Exercise Price | |
| Outstanding, April 30, 2015 | $ / shares | $ 15.45 |
| Exercised | $ / shares | 15.26 |
| Forfeited/expired. | $ / shares | 17.97 |
| Outstanding, October 31, 2015 | $ / shares | 15.53 |
| Exercisable, October 31, 2015 | $ / shares | $ 15.53 |
| Weighted-Average Remaining Contractual Life (In Years) | |
| Outstanding, October 31, 2015 | 1 year 5 months 16 days |
| Exercisable, October 31, 2015 | 1 year 5 months 16 days |
| Aggregate Intrinsic Value | |
| Outstanding, October 31, 2015 | $ | $ 2,416 |
| Exercisable, October 31, 2015 | $ | $ 2,416 |
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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Options, Aggregate Intrinsic Value [Abstract] No definition available.
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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Options, Weighted Average Remaining Contractual Term [Abstract] No definition available.
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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition 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 Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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- Definition Weighted average price at which option holders acquired shares when converting their stock options into shares. No definition available.
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- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated. No definition available.
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- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Number of share options (or share units) exercised during the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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