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Stock Based Compensation Expense (Tables)
 6 Months Ended
Jun. 30, 2012
Stock Based Compensation Expense [Abstract]  
Summary of Option activity

Option activity within each plan is as follows:

 

                         
    Incentive
Stock Option
Plans		     Weighted Average
Price Per Share		     Exercisable
Weighted
Average
Price
Per Share		  

Balance outstanding, December 31, 2011

     1,388,514     $ 7.44     $ 7.26  

Options granted

     —         —            

Options exercised, range from $7.50-$14.74

     (35,340 )      13.37          

Options expired or forfeited

     —         —            
   

 

 

    

 

 

    

 

 

  

Balance outstanding, March 31, 2012

     1,353,174     $ 7.28     $ 6.95  

Options granted

     —         —            

Options exercised, range from $7.50-$14.74

     (64,712 )      13.77          

Options expired or forfeited

     (14,000 )      7.50          
   

 

 

    

 

 

    

 

 

  

Balance outstanding, June 30, 2012

     1,274,462     $ 6.94     $ 6.27  
   

 

 

    

 

 

    

 

 

  
Summary of stock options summarized by exercise price

Information relating to stock options at June 30, 2012 summarized by exercise price is as follows:

 

                                         
    Outstanding Weighted Average     Exercisable Weighted
Average		  

Exercise Price Per Share

   Shares     Remaining
Life
(Months)		     Exercise
Price		     Shares     Exercise
Price		  

Incentive Stock Option Plan:

                                        

$3.67

     450,000       6     $ 3.67       450,000     $ 3.67  

$7.50

     678,666       101     $ 7.50       69,667     $ 7.50  

$11.32—$14.99

     145,796       20     $ 14.41       129,129     $ 14.75  
   

 

 

            

 

 

    

 

 

    

 

 

  
      1,274,462             $ 6.94       648,796     $ 6.27  
   

 

 

            

 

 

    

 

 

    

 

 

  
Weighted average exercise prices for options granted and exercisable and the weighted average remaining contractual life for options outstanding

The weighted average exercise prices for options granted and exercisable and the weighted average remaining contractual life for options outstanding as of June 30, 2012 was as follows:

 

                                 
    Number
of
Shares		     Weighted
Average
Exercise
Price		     Weighted
Average
Remaining
Contractual
Life
(Months)		     Intrinsic
Value
(thousands)		  

As of June 30, 2012:

                                

Incentive Stock Option Plans:

                                

Outstanding

     1,274,462     $ 6.94       58     $ 25,044  

Expected to Vest

     1,263,083     $ 6.93       58     $ 24,829  

Exercisable

     648,796     $ 6.27       17     $ 13,183  
Summery of non-vested shares

Restricted Shares—A status summary of non-vested shares as of and for the six months ended June 30, 2012 is presented below:

 

                 
    Number
of
Shares		     Weighted
Average
Grant-
Date
Fair Value		  

Nonvested shares at December 31, 2011

     101,640     $ 11.37  

Granted

     207,184     $ 20.45  

Vested

     (82,640 )    $ 11.73  

Forfeited

     —         —    
   

 

 

    

 

 

  

Nonvested shares at March 31, 2012

     226,184     $ 19.55  

Granted

     —         —    

Vested

     —         —    

Forfeited

     (1,367 )   $ 20.47  
   

 

 

    

 

 

  

Nonvested shares at June 30, 2012

     224,817     $ 19.55