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Stock-Related Benefit Plans (Tables)
12 Months Ended
Dec. 31, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Summary of Activity for Restricted Stock Awards
The following table provides a summary of activity with regard to restricted stock awards in the year ended December 31, 2019:
 
For the Year Ended December 31, 2019
 
 
Number of Shares
   
Weighted Average
Grant Date
Fair Value
 
Unvested at beginning of year
   
6,904,388
     
$
14.74
 
Granted
   
2,031,198
     
10.45
 
Vested
   
(2,203,895
)    
15.18
 
Canceled
   
(215,590
)    
12.89
 
                 
Unvested at end of year
   
6,516,101
     
13.31