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Stock Based Compensation Expense (Tables)
 3 Months Ended
Mar. 31, 2013
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, 2012

      705,345      $ 7.70       $ 7.95   

Options granted

      —          —        

Options exercised, $7.50

      (6,666 )      7.50      

Options forfeited

      (6,667 )      7.50      
  

 

 

    

 

 

     

 

 

  

Balance outstanding, March 31, 2013

      692,012      $ 7.71       $ 7.96   
  

 

 

    

 

 

     

 

 

  
Summary of Stock Options Summarized by Exercise Price

Information relating to stock options at March 31, 2013 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:

               

$7.50

      665,333         88       $ 7.50         159,333       $ 7.50  

$11.32—$14.75

      26,679         89       $ 12.90         13,346       $ 13.52   
  

 

 

        

 

 

     

 

 

     

 

 

  
     692,012          $ 7.71         172,679       $ 7.96   
  

 

 

        

 

 

     

 

 

     

 

 

  
Weighted Average Exercise Prices for Options Granted and Exercisable and 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 March 31, 2013 was as follows:

 

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

As of March 31, 2012:

            

Incentive Stock Option Plans:

            

Outstanding

      692,012       $ 7.71         88       $ 15,751   

Expected to Vest

      686,022       $ 7.71         88       $ 15,615   

Exercisable

      172,679       $ 7.96         74       $ 3,886   
Summary of Non-Vested Shares

Restricted Shares—A status summary of non-vested shares as of and for the three months ended March 31, 2013 is presented below:

 

     Number
of
Shares		     Weighted
Average
Grant-
Date
Fair Value		  

Nonvested shares at December 31, 2012

      245,817      $ 20.23   

Granted

      145,884      $ 31.27   

Vested

      —          —     

Forfeited

      (8,000 )    $ 22.17   
  

 

 

    

 

 

  

Nonvested shares at March 31, 2013

      383,701      $ 24.39