Note 2 - Earnings Per Share

6 Months Ended

Jun. 30, 2018

2.	Earnings Per Share

We compute basic earnings per share by dividing net earnings available to common stockholders by the actual weighted average number of common shares outstanding for the reporting period. Diluted earnings per share reflects the potential dilution that could occur if holders of unvested restricted and performance share units converted their holdings into common stock. The dilutive effect of restricted and performance share units was

1.2

million shares during the

second

quarter

2018

and

2017.

During the

six

months ended

June 30, 2018

and

2017,

the dilutive effect of restricted and performance share units and stock options was also

1.2

million shares for both periods.