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Share-Based Compensations - Weighted-Average Estimated Fair Value Per Share of Options Granted under Plans (Detail) (USD $)
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12 Months Ended | ||
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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| Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] | |||
| Weighted-average estimated fair value per share of options granted | $ 4.48 | $ 5.40 | $ 6.23 |
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- Details
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- Definition
The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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