Quarterly report pursuant to Section 13 or 15(d)

STOCK-BASED COMPENSATION - Restricted Stock Activity (Details)

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STOCK-BASED COMPENSATION - Restricted Stock Activity (Details) - Non-vested restricted stock unit awards
9 Months Ended
Sep. 30, 2021
shares
Number of Restricted Share Units  
Outstanding at beginning of year (in shares) 3,038,785
Granted (in shares) 2,508,442
Vested (in shares) (880,818)
Forfeited (in shares) (210,415)
Outstanding at end of year (in shares) 4,455,994