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Earnings Per Share - (Tables)
 6 Months Ended
Jun. 30, 2012
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
The Company’s basic and diluted earnings per share amounts are as follows:

Three Months Ended June 30,
 
Six Months Ended June 30,

2012

2011
 
2012

2011
Numerator:





 





Net income
$
6,346


$
6,957

 
$
8,208


$
13,696

Denominator:



 

 



 

Basic earnings per share - weighted average shares outstanding
32,144


31,589

 
32,110


31,626

Effect of potential dilutive securities:



 

 



 

Employee stock options and restricted stock units - dilutive shares
583


449

 
635


491

     Diluted earnings per share - weighted average shares outstanding
32,727


32,038

 
32,745


32,117

Earnings per share:
 


 

 
 


 

Basic
$
0.20


$
0.22

 
$
0.26


$
0.43

Diluted
$
0.19


$
0.22

 
$
0.25


$
0.43