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Share-based Compensation (Tables)
12 Months Ended
Dec. 31, 2014
Share-based Compensation [Abstract]  
Summary of the restricted stock activity
A summary of the restricted stock activity under the Program as of December 31, 2014 is presented below:
 
     
 
Restricted Stock
   
Weighted Average
 
Weighted Average
Remaining
Awards
 
Shares
  
Award Price
 
Contractual Term
         
Outstanding at January 1, 2014
  
412,350
  
$
18.85
 
 3.4 years
Granted
  
378,000
   
23.57
  
Vested
  
(120,175
)
  
18.69
  
Forfeited
  
(26,900
)
  
22.03
  
Outstanding at December 31, 2014
  
643,275
  
$
21.52
 
 3.8 years