XML 55 R16.htm IDEA: XBRL DOCUMENT v2.4.0.6
Earnings per Share
 9 Months Ended
Sep. 30, 2012
Earnings Per Share [Abstract]  
Earnings per Share [Text Block]
Earnings per Share
The dilutive effect of all outstanding stock options and unvested restricted stock units and performance share awards is included in the diluted earnings per share calculations using the treasury stock method. In addition, contingently issuable restricted stock units or performance share awards for which all necessary conditions had not been met have been excluded from the calculation. Diluted earnings per share applicable to common shareholders excludes vested options for the purchase of common stock that have grant prices in excess of the average market price, or which are otherwise anti-dilutive. For the three and nine months ended September 30, 2012 and 2011, respectively, less than 0.1 million shares were excluded from the calculation of diluted earnings per share applicable to common shareholder calculations, as these shares relate to anti-dilutive stock options and restricted stock-based awards as calculated using the treasury stock method and could be dilutive in the future.
Earnings per share for three and nine months ended September 30, 2012 and 2011 are calculated as follows:
 
Three Months Ended
 
Nine Months Ended
 
September 30,
 
September 30,
 
2012
 
2011
 
2012
 
2011
Numerator:
 
 
 
 
 
 
 
Net income
$
11,051

 
$
18,287

 
$
26,355

 
$
79,113

Denominator:
 
 
 
 
 
 
 
Shares used in computing basic earnings per share
42,969

 
42,511

 
42,852

 
42,334

Dilutive common stock equivalents
222

 
284

 
140

 
381

Shares used in computing diluted earnings per share
43,191

 
42,795

 
42,992

 
42,715

Basic earnings per share
$
0.26

 
$
0.43

 
$
0.62

 
$
1.87

Diluted earnings per share
$
0.26

 
$
0.43

 
$
0.61

 
$
1.85