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 September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Numerator for basic and diluted earnings per share:
Net income	$	65,618	$	42,634	$	180,291	$	103,634
Numerator for basic and diluted earnings per share	$	65,618	$	42,634	$	180,291	$	103,634

Denominator:
Weighted average common shares for basic earnings per share	53,851,865		52,545,155		53,485,339		51,806,700
Net effect of dilutive stock options, restricted stock units and restricted stock awards	3,111,002		2,683,626		3,114,299		2,854,496
Weighted average common shares for diluted earnings per share	56,962,867		55,228,781		56,599,638		54,661,196

Net income per share:
Basic	$	1.22	$	0.81	$	3.37	$	2.00
Diluted	$	1.15	$	0.77	$	3.19	$	1.90

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 157,316 and 121,896 during the three and nine months ended September 30, 2018, respectively. 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 606,047 and 1,177,453 during the three and nine months ended September 30, 2017, respectively.