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Earnings per Share Level 1 (Notes)
 6 Months Ended
Jun. 30, 2011
Earnings Per Share [Abstract]  
Earnings Per Share [Text Block]
EARNINGS PER SHARE


We compute basic earnings per common share by dividing net income available to common shareholders by the weighted average number of common shares outstanding during the period. Diluted earnings per common and potential common shares include additional shares in the weighted average share calculations associated with the incremental effect of dilutive employee stock options, restricted stock awards and contingently issuable shares, as determined using the treasury stock method. The
following table summarizes the calculation of weighted average common shares outstanding used in the computation of diluted earnings per share (in thousands):


 
Three Months Ended
 
Six Months Ended
 
June 30,
 
June 30,
 
2011
 
2010
 
2011
 
2010
 
(Unaudited)
 
(Unaudited)
Weighted average basic common shares outstanding
45,945


 
44,651


 
45,587


 
44,743


Effect of dilutive securities:
 
 
 
 
 
 
 
Stock options
23


 
55


 
24


 
56


Contingent shares
68


 
44


 
63


 
37


Restricted stock and other
230


 
568


 
274


 
550


 Senior exchangeable notes
1,097


 
1,823


 
1,176


 
1,586


 Warrants
1,299


 
816


 
1,818


 
424


Weighted average diluted common and potential common shares outstanding
48,662


 
47,957


 
48,942


 
47,396






In 2006, we sold warrants on our common shares, which have an exercise price of $61.25 per share, and will settle in January 2012.  The warrant agreement calls for the net value of these warrants to be settled with Core Laboratories N.V. common shares. 


Included in the table above are 1,299,000 and 816,000 shares which were added to the share count for the three months ended June 30, 2011 and 2010, respectively, and 1,818,000 and 424,000 shares which were added to the share count for the six months ended June 30, 2011 and 2010, respectively, because the average share price exceeded the strike price of the warrants.  These shares were included in calculating the impact to our dilutive earnings per share for the three and six months ended June 30, 2011 and 2010.