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Net Income Per Share | 3 Months Ended
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Mar. 31, 2015
Earnings Per Share [Abstract] |
Net Income Per Share |
14) | Net Income Per Share
The following table sets forth the computation of basic and diluted net income per share:
|  | Three Months Ended March 31, |
|  | 2015 |  |  | 2014 |
Numerator: |  |  |  |  |  |  |  |
Net income |  | $ | 33,786 |  |  | $ | 31,245 |
Denominator: |  |  |  |  |  |  |  |
Shares used in net income per common share – basic |  |  | 53,214,000 |  |  |  | 53,411,000 |
Effect of dilutive securities: |  |  |  |  |  |  |  |
Stock options, restricted stock and employee stock purchase plan |  |  | 315,000 |  |  |  | 365,000 |
Shares used in net income per common share – diluted |  |  | 53,529,000 |  |  |  | 53,776,000 |
Net income per common share: |  |  |  |  |  |  |  |
Basic |  | $ | 0.63 |  |  | $ | 0.58 |
Diluted |  | $ | 0.63 |  |  | $ | 0.58 |
Basic earnings per share (“EPS”) is computed by dividing income available to common stockholders by the weighted-average number of common shares outstanding during the period. The computation of diluted EPS is similar to the computation of basic EPS except that the denominator is increased to include the number of additional common shares that would have been outstanding (using the treasury stock method) if securities containing potentially dilutive common shares (stock options and restricted stock units) had been converted to such common shares, and if such assumed conversion is dilutive. As of March 31, 2015, stock options and restricted stock units related to an aggregate of approximately 760,000 shares were outstanding. For the three months ended March 31, 2015 and 2014, the potential dilutive effect of 0 and approximately 1,400 weighted-average shares, respectively, of restricted stock units and stock options were excluded from the computation of diluted weighted-average shares outstanding as the shares would have an anti-dilutive effect on EPS.

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