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Share-Based Compensation - Summary of Restricted Stock Units and Restricted Stock (Details) - Restricted stock and restricted stock units
shares in Thousands
3 Months Ended
Mar. 31, 2021
$ / shares
shares
Number  
Beginning balance (in shares) | shares 561
Granted (in shares) | shares 287
Vested (in shares) | shares (146)
Forfeited (in shares) | shares (4)
Ending balance (in shares) | shares 698
Weighted Average Grant Date Fair Value  
Beginning balance (in dollars per share) | $ / shares $ 33.31
Granted (in dollars per share) | $ / shares 29.19
Vested (in dollars per share) | $ / shares 35.35
Forfeited (in dollars per share) | $ / shares 30.70
Ending balance (in dollars per share) | $ / shares $ 31.21