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Share-Based Compensation (Tables)
6 Months Ended
Jun. 30, 2012
Share-Based Compensation [Abstract]  
Summary of Stock Options Activity
Stock option activity for the six months ended June 30, 2012 is summarized below:

        
Weighted
   
        
Average
   
      
Weighted
 
Remaining
  
Aggregate
      
Average
 
Contractual
  
Intrinsic
      
Exercise
 
Life
  
Value
   
Shares
  
Price
 
(in years)
  
(in thousands)
Options outstanding, January 1, 2012
  165,710  $21.64      
Granted
  0   0      
Exercised
  0   0      
Canceled or expired
  (3,750)  21.94      
Options outstanding, June 30, 2012
  161,960  $21.63 
3.96
 $
                      0
Options exercisable, June 30, 2012
  143,093  $21.84 
3.79
 $
                      0