Earnings per share

6 Months Ended

Jun. 30, 2014

Earnings Per Share [Abstract]

Earnings per share

Earnings per share.Basic earnings per share are computed based upon the weighted average number of common shares outstanding. Diluted earnings per share are computed based upon the weighted average number of common shares outstanding and dilutive common share equivalents (consisting of stock options, restricted stock units and employee stock purchase plan shares) 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):

	Three Months Ended		Six Months Ended
	June 30,		June 30,
	2014	2013	2014	2013
Weighted average number of common shares outstanding used to compute basic earnings per share	54,372	53,378	54,239	53,213
Dilutive effect of stock-based awards	801	949	859	1,009
Number of shares used to compute diluted earnings per share	55,173	54,327	55,098	54,222

There were 182,000 and 107,000 weighted average share equivalents outstanding during the three and six months ended June 30, 2013, respectively, that were excluded from the computation of diluted earnings per share that were anti-dilutive when applying the treasury stock method. There were no significant share equivalents outstanding during the three and six months ended June 30, 2014 that became anti-dilutive when applying the treasury stock method.