Stock Based Compensation (Stock Option Activity) (Detail) - 6 months ended Jun. 30, 2015 - $ / shares shares in Thousands |
Total |
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| Stock-Based Compensation [Abstract] | |
| Number of Shares Underlying Options, Outstanding at beginning of period | 4,765 |
| Number of Shares Underlying Options, Granted | 1,406 |
| Number of Shares Underlying Options, Exercised | (245) |
| Number of Shares Underlying Options, Forfeited | (235) |
| Number of Shares Underlying Options, Outstanding at end of period | 5,691 |
| Weighted Average Exercise Price Per Share, Outstanding at beginning of period | $ 7.41 |
| Weighted Average Exercise Price Per Share, Granted | 4.85 |
| Weighted Average Exercise Price Per Share, Exercised | 4.28 |
| Weighted Average Exercise Price Per Share, Forfeited | 5.72 |
| Weighted Average Exercise Price Per Share, Outstanding at end of period | $ 6.92 |
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- References No definition available.
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- Definition 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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Gross number of share options (or share units) granted during the period. No definition available.
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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 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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- 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 Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. No definition available.
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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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