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Stock-Based Compensation (Tables)
 9 Months Ended
Sep. 30, 2018
Summary of Activity for Restricted Stock Awards

The following table provides a summary of activity with regard to restricted stock awards in the nine months ended September 30, 2018:

 

     Number of Shares   Weighted Average
Grant Date
Fair Value

Unvested at beginning of year

        5,574,167     $ 15.38

Granted

        2,535,523       13.51

Vested

        (842,202 )       15.16

Canceled

        (233,640 )       14.87
    

 

 

      

Unvested at end of period

        7,033,848       14.75