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Stock-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2021
Disclosure Of Compensation Related Costs Sharebased 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 six months ended June 30, 2021:

 

 

 

Number of
Shares

 

 

Weighted Average
Grant Date
Fair Value

 

Unvested at beginning of year

 

 

6,228,048

 

 

$

12.43

 

Granted

 

 

3,045,949

 

 

 

11.16

 

Vested

 

 

(2,015,702

)

 

 

13.19

 

Canceled

 

 

(172,900

)

 

 

11.72

 

Unvested at end of period

 

 

7,085,395

 

 

 

11.68

 
Summary of Activity for Performance-Based Restricted Stock Units

The following table provides a summary of activity with regard to Performance-Based Restricted Stock Units ("PSUs") in the six months ended June 30, 2021:

 

 

 

Number of
Shares

 

 

Performance
Period

 

Expected
Vesting
Date

Outstanding at beginning of year

 

 

477,872

 

 

 

 

 

Granted

 

 

356,740

 

 

January 1, 2021 - December 31, 2023

 

March 31, 2024

Outstanding at end of period

 

 

834,612