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Stock Based Compensation (Tables)
 3 Months Ended
Mar. 31, 2013
Stock Based Compensation [Abstract]  
Summary of stock options activity
The following table is a summary of the Company's stock options: 

 
Options
 
Number of
Shares
   
Weighted
Average
Exercise Price
 
           
Outstanding at December 31, 2012
   
2,264,399
   
$
7.02
 
Granted
   
10,000
   
$
11.44
 
Exercised
   
(114,599
)
 
$
5.40
 
Forfeited or expired
   
(2,950
)
 
$
10.42
 
Outstanding at March 31, 2013
   
2,156,850
   
$
7.13
 
Exercisable at March 31, 2013
   
1,143,074
   
$
6.16
 

Summary of nonvested stock option and restricted stock
The following table is a summary of the Company's nonvested stock options and restricted stock:

 

   
Nonvested Stock Options
   
Nonvested Restricted Stock
 
   
Number of
Shares
   
Weighted-
Average
Grant-Date
Fair Value
   
Number of
Shares
   
Weighted-
Average
Grant-Date
Fair Value
 
                     
Nonvested at December 31, 2012
   
1,029,776
   
$
4.62
     
31,145
   
$
5.76
 
Granted
   
10,000
   
$
6.55
     
-
   
$
-
 
Vested during period
   
(25,000
)
 
$
2.69
     
(29,450
)
 
$
5.54
 
Forfeited
   
(1,000
)
 
$
3.39
     
-
   
$
-
 
Nonvested at March 31, 2013
   
1,013,776
   
$
4.69
     
1,695
   
$
9.64