Earnings Per Share

12 Months Ended

Dec. 31, 2019

EARNINGS PER SHARE

Basic earnings per share is computed by dividing net income attributable to our stockholders by the weighted average number of shares of common stock and vested deferred stock units outstanding during the year. The computation of diluted earnings per share is similar to the computation of basic earnings per share, except that the denominator is increased for the assumed exercise of dilutive options and assumed issuance of unvested restricted stock units and unvested deferred stock units using the treasury stock method unless the effect is anti-dilutive. The treasury stock method assumes that proceeds, including cash received from the exercise of employee stock options and the total unrecognized compensation expense for unvested share-based compensation awards, would be used to purchase our common stock at the average market price during the period. Vested deferred stock units outstanding are included in shares outstanding for basic and diluted earnings per share because the associated shares of our common stock are issuable for no cash consideration, the number of shares of our common stock to be issued is fixed and issuance is not contingent. See "Note 5. Share-Based Compensation" for additional information regarding deferred stock units.

The following is a reconciliation of weighted average shares outstanding for basic and diluted earnings per share:



(in thousands)	For the Years Ended December 31,
	2019	2018	2017

Shares outstanding for basic earnings per share:	86,115	86,864	87,769

Shares outstanding for diluted earnings per share:
Shares outstanding for basic earnings per share	86,115	86,864	87,769
Dilutive effect of share-based payment awards	1,427	1,606	1,798
	87,542	88,470	89,567

Certain options to acquire shares have been excluded from the calculation of shares outstanding for diluted earnings per share because they were anti-dilutive. The following table presents information concerning those anti-dilutive options:



(in thousands)	For the Years Ended December 31,
	2019	2018	2017

Weighted average number of shares underlying anti-dilutive options	200	287	327