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Share-Based Compensation - Share-Based Payment Award Activity (Parenthetical) (Detail) (USD $)
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Sep. 30, 2013
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Jun. 30, 2013
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Dec. 31, 2012
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| Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] | |||
| Intrinsic value represents the excess of the closing stock price related to options outstanding | $ 16.57 | $ 17.67 | $ 13.59 |
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- Definition
The excess of the closing stock price on the last day of the trading period over the exercise price. No definition available.
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- Details
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