XML 19 R48.htm IDEA: XBRL DOCUMENT  v2.3.0.11
Earnings Per Share (Tables)
 6 Months Ended
Jun. 30, 2011
Earnings Per Share  
Computation of Basic and Diluted Earnings Per Share

 

 

Three Months Ended
June 30,

 

Six Months Ended
June 30,

 

 

 

2011

 

2010

 

2011

  

2010

 

 

 

 

 

 

 

 

 

 

 

  

 

 

 

Net income

 

$

3,416

  

$

21,109

 

$

34,814

  

$

44,849

 

Shares for basic and diluted calculations:

 

 

 

  

 

 

 

 

 

  

 

 

 

Average shares used in basic computation

 

 

52,932

  

 

46,257

 

 

52,734

  

 

46,168

 

Dilutive effect of stock options and units (1)

 

 

10,313

  

 

6,094

 

 

10,505

  

 

6,291

 

Average shares used in diluted computation

 

$ 

63,245

  

$

52,351

 

$ 

63,239

  

$

52,459

 

Net income per share:

 

 

 

  

 

 

 

 

 

  

 

 

 

Basic

 

$

0.06

  

$

0.46

 

$

0.66

  

$

0.97

 

Diluted (1)

 

$

0.05

  

$

0.40

 

$

0.55

  

$

0.85

 

                           

 (1)      Diluted earnings per share is computed on the basis of the weighted average number of shares of common stock plus the effect of dilutive potential common shares outstanding during the period using the treasury stock method. Diluted earnings per share include stock options and units.