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Share-Based Compensation - Summary of Stock Options Outstanding under Plans (Parenthetical) (Detail) (USD $)
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Dec. 31, 2012
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| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] | |
| Intrinsic value represents the excess of the closing stock price related to options outstanding | $ 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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