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Stock Based Compensation (Tables)
 3 Months Ended
Mar. 31, 2014
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, 2013
  
2,229,969
  
$
9.39
 
Granted
  
20,000
  
$
17.66
 
Exercised
  
(139,000
)
 
$
9.47
 
Forfeited or expired
  
(18,550
)
 
$
6.99
 
Outstanding at March 31, 2014
  
2,092,419
  
$
9.49
 
Exercisable at March 31, 2014
  
1,020,019
  
$
6.51
 
Summary of nonvested stock options and restricted stock
The following table is a summary of the Company’s nonvested stock options:

 
Number of Shares
  
Weighted-Average
Grant-Date
Fair Value
 
    
Nonvested at December 31, 2013
  
1,080,900
  
$
6.50
 
Granted
  
20,000
  
$
7.21
 
Vested during period
  
(22,500
)
 
$
3.32
 
Forfeited
  
(6,000
)
 
$
5.21
 
Nonvested at March 31, 2014
  
1,072,400
  
$
6.59