Earnings per share

12 Months Ended

Dec. 31, 2015

Earnings per Share

Basic earnings per share are computed using the weighted average number of shares outstanding and diluted earnings per share are computed using the weighted average number of shares and dilutive share equivalents (consisting of incentive stock options, non-qualified stock options, restricted stock units and employee stock purchase plan contributions) outstanding during the periods using the treasury stock method.

The following is a reconciliation of the shares used to compute basic and diluted earnings per share (in thousands):



	Year Ended December 31,
	2015	2014	2013
Weighted average number of common shares outstanding used to compute basic earnings per share	52,259	53,437	53,481
Dilutive effect of stock-based awards	746	857	1,074
Number of shares used to compute diluted earnings per share	53,005	54,294	54,555

There were no significant share equivalents outstanding as of December 31, 2015, 2014 and 2013 that were anti-dilutive when applying the treasury stock method.