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Stock-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2016
Stock-Based Compensation [Abstract]  
Restricted Stock Activity
Restricted stock activity for the six months ended June 30, 2016 was as follows (shares in thousands):
 
 
 
Shares
  
Weighted-Average
Grant Date Fair Value
 
Restricted stock awards outstanding at December 31, 2015
  
1,370
  
$
17.82
 
Awards granted
  
358
   
19.95
 
Awards vested
  
(311
)
  
17.16
 
Awards forfeited
  
(74
)
  
17.56
 
Restricted stock awards outstanding at June 30, 2016
  
1,343
  
$
18.53