Earnings Per Share Computation
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Mar. 31, 2013
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Earnings Per Share Computation [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Earnings Per Share Computation | 7. Net Income Per Share
Basic net income per share is computed by dividing net income by the weighted average number of common shares outstanding during the period. Diluted net income 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. Restricted stock units issued under the Company's stock-based employee compensation plans are included in diluted shares upon the granting of the awards even though the vesting of shares will occur over time. Performance-based awards are included in diluted shares based on the level of performance that management estimates is the most probable outcome at the grant date. Throughout the requisite service period, management monitors the probability of achievement of the performance condition and, if material, adjusts the number of shares included in diluted shares accordingly.
The following table sets forth the reconciliation of numerators and denominators of basic and diluted net income per share computations for the three months ended March 31, 2013 and 2012 (dollars and shares in thousands, except per share amounts):
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