Earnings Per Share

Basic earnings per share is computed by dividing net income available to common stockholders by the weighted-average number of common shares outstanding. Diluted earnings per share is computed by dividing net income available to common stockholders by the weighted-average number of common shares plus the effect of dilutive potential common shares outstanding during the period. Net income and earnings per share for 2018 reflect lower effective tax rates due to the enactment of the Tax Act in December 2017, as discussed further below (see "Management’s Discussion and Analysis of Financial Condition and Results of Operations-Results of Operations-Other costs/(income)"). The following table sets forth the computation of basic and diluted earnings per share (shares in thousands):



	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
Numerator:
Net income available to common stockholders	$	333	$	199	786		449
Denominator:
Denominator for basic earnings per share—weighted-average common shares	82,344		84,663		83,345		84,585
Effect of dilutive securities:
Employee stock options	372		398		389		401
Restricted stock units	456		531		477		488
Denominator for diluted earnings per share—adjusted weighted-average common shares	83,172		85,592		84,211		85,474
Basic earnings per share	$	4.05	$	2.36	$	9.44	$	5.31
Diluted earnings per share	$	4.01	$	2.33	$	9.34	$	5.26