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Stock-Based Compensation Plans (Tables)
9 Months Ended
Sep. 30, 2013
Stock-Based Compensation Plans [Abstract]  
Summary of changes in outstanding stock options
The following is a summary of the changes in outstanding stock options for the nine months ended September 30, 2013:

 
Shares
Weighted
Average
Exercise
Price
Weighted Average
Remaining
Contractual
Term (Years)
 
Outstanding at December 31, 2012
  
29,150
  
$
12.20
   
1.9
 
Expired
  
   
   
 
Exercised
  
(11,525
)
  
12.37
   
 
Forfeited, other
  
   
   
 
Outstanding at September 30, 2013
  
17,625
  
$
12.09
   
1.3
 
 
            
Options exercisable at September 30, 2013
  
17,625
  
$
12.09
   
1.3
 
Restricted and performance-based share activity
Our restricted and performance-based share activity was as follows for the nine months ended September 30, 2013:

 
 
Shares
  
Weighted Average
Grant Date Fair
Value Per Share
 
Balance at December 31, 2012
  
533,625
  
$
13.03
 
Granted
  
7,000
   
32.01
 
Vested
  
(102,625
)
  
10.04
 
Forfeited
  
(7,125
)
  
13.38
 
Balance at September 30, 2013
  
430,875
  
$
14.05