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Earnings Per Share Computation
3 Months Ended
Mar. 31, 2012
Earnings Per Share Computation [Abstract]  
Earnings Per Share Computation
6. Earnings Per Share Computation

Basic earnings per share is computed by dividing net income by the weighted average number of common shares outstanding during the period. Diluted earnings per share is calculated by giving effect to the potential dilution that could occur if securities or other contracts to issue common shares were exercised and converted into common shares during the period.

The following table sets forth the reconciliation of numerators and denominators for the basic and diluted earnings per share computation for the three months ended March 31, 2012 and 2011 (dollars in thousands, except per share amounts):