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Stock-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2017
Summary of Activity for Restricted Stock Awards

The following table provides a summary of activity with regard to restricted stock awards in the six months ended June 30, 2017:

 

     Number of Shares      Weighted Average
Grant Date
Fair Value		  

Unvested at beginning of year

      6,930,306      $ 15.37  

Granted

      2,818,749        15.27  

Vested

      (2,193,074 )       15.01  

Canceled

      (94,300 )       15.67  
  

 

 

     

Unvested at end of period

      7,461,681        15.44