EARNINGS PER SHARE

Basic earnings per share is computed by dividing income available to common shareholders by the weighted-average number of shares of common stock outstanding during the period. Diluted earnings per share is computed by dividing income available to common shareholders by the weighted-average number of shares of common stock outstanding during the period increased to include the number of additional shares of common stock that would have been outstanding if the potentially dilutive securities had been issued. Potentially dilutive securities include outstanding stock options, unvested restricted stock and unvested equity-settled RSUs. The dilutive effect of potentially dilutive securities is reflected in diluted earnings per share by application of the treasury stock method.

The following table sets forth the computation of basic and diluted earnings per share of common stock as follows:



	Three Months Ended March 31,
	2019		2018
Numerator for basic and diluted earnings per share:
Net income	$	60,754	$	64,418
Numerator for basic and diluted earnings per share	$	60,754	$	64,418

Denominator:
Weighted average common shares for basic earnings per share	54,245,133		53,078,529
Net effect of dilutive stock options, restricted stock units and restricted stock awards	2,991,294		3,162,010
Weighted average common shares for diluted earnings per share	57,236,427		56,240,539

Net income per share:
Basic	$	1.12	$	1.21
Diluted	$	1.06	$	1.15

The number of shares underlying equity–based awards that were excluded from the calculation of diluted earnings per share as their effect would be anti–dilutive was 26,203 and 53,230 during the three months ended March 31, 2019 and 2018, respectively.