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Earnings Per Share	3 Months Ended
Earnings Per Share	Mar. 31, 2013
Earnings Per Share	7. Earnings Per Share The calculation of basic earnings per share excludes any dilutive effect of stock options, while diluted earnings per share includes the dilutive effect of stock options. The number of dilutive shares excluded from this calculation because of their anti-dilutive effect for stock options is 375,285 and 343,478 for the three months ended March 31, 2013 and 2012.

- Definition

The entire disclosure for earnings per share.

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