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Stock-Based Compensation Plans (Tables)
 9 Months Ended
Sep. 30, 2015
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, 2015:

  
Shares
  
Weighted
Average
 Exercise Price
  
Weighted Average
 Remaining Contractual
 Term (Years)
 
       
Outstanding at December 31, 2014.
  
9,875
  
$
10.99
   
0.4
 
Expired
  
—
   
—
   
—
 
Exercised
  
(9,875
)
  
10.99
   
—
 
Forfeited, other
  
—
   
—
   
—
 
Outstanding at September 30,      2015
  
—
  
$
—
   
—
 
             
Options exercisable at September 30, 2015
  
—
  
$
—
   
—
 

The total intrinsic value of options exercised was $0.3 million for the nine months ended September 30, 2015.  There were no options granted in the nine months ended September 30, 2015.
Restricted and Performance-based Share Activity
Our restricted and performance-based share activity was as follows for the nine months ended September 30, 2015:

  
Shares
  
Weighted Average
 Grant Date Fair
Value Per Share
 
Balance at December 31, 2014
  
749,018
  
$
24.62
 
Granted
  
7,000
   
35.07
 
Vested
  
(48,918
)
  
33.07
 
Forfeited
  
(4,250
)
  
25.70
 
Balance at September 30, 2015
  
702,850
  
$
24.13