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Earnings Per Share - Additional Information (Detail)
In Millions, unless otherwise specified |
12 Months Ended |
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Dec. 31, 2012
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| Earnings Per Share [Abstract] | |
| Number of common shares covered by out-of-the-money stock options | 0.2us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements |
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- Details
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- Definition
Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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