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Stock Incentive Plans and Stock-Based Compensation (Tables)
9 Months Ended
Sep. 30, 2012
Stock Incentive Plans and Stock-Based Compensation [Abstract]  
Summary of stock option activity
                 
    Number
of Options
    Weighted Average
Exercise Price
 

Outstanding at December 31, 2011

    671,294     $ 14.48  
     

Options granted

    7,500     $ 17.55  

Options exercised

    (127,797   $ 14.11  

Options cancelled or expired

    (7,500   $ 13.76  
   

 

 

         
     

Outstanding at September 30, 2012

    543,497     $ 14.62  
   

 

 

         
     

Exercisable at September 30, 2012

    245,972     $ 13.53  
   

 

 

         
     

Available for grant at September 30, 2012

    586,300          
   

 

 

         
Summary of stock options outstanding
                                 
    Three Months Ended
September 30,
    Nine Months Ended
September 30,
 
($ in thousands, except per share data)   2012     2011     2012     2011  
         

Intrinsic value of options exercised in the period

  $ 113     $ 0     $ 793     $ 34  

 

                 
    As of September 30,  
    2012     2011  

Stock options:

               

Aggregate intrinsic value

  $ 3,337     $ 379  

Weighted average contractual term of options

    6.80 years       7.15 years