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Stock-Based Compensation Plans (Tables)
3 Months Ended
Mar. 31, 2019
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, 2019:

  
Shares
  
Weighted Average
Grant Date Fair
Value Per Share
 
Balance at December 31, 2018
  
870,041
  
$
34.59
 
Granted
  
   
 
Vested
  
(17,807
)
  
26.50
 
Forfeited
  
(2,000
)
  
44.95
 
Balance at March 31, 2019
  
850,234
  
$
34.73