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Stock-Based Compensation Plans (Tables)
3 Months Ended
Mar. 31, 2016
Stock-Based Compensation Plans [Abstract]  
Restricted and Performance-based Share Activity
Our restricted and performance-based share activity was as follows for the three months ended March 31, 2016:

  
Shares
  
Weighted Average
Grant Date Fair
Value Per Share
 
Balance at December 31, 2015
  
758,550
  
$
27.19
 
Granted
  
   
 
Vested
  
   
 
Forfeited
  
(1,125
)
  
32.40
 
Balance at March 31, 2016
  
757,425
  
$
27.19