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Stock-Based Compensation Plans (Tables)
3 Months Ended
Mar. 31, 2022
Share-based Payment Arrangement [Abstract]  
Information Regarding Restricted Shares
The following table summarizes information regarding Restricted Shares:
 Three Months Ended March 31, 2022
SharesWeighted Average
Grant-Date Fair
Value
Number of unvested shares:  
Outstanding as of January 1, 20221,671,011 $43.06 
Granted891,178 33.12 
Vested(477,498)43.25 
Forfeited(109,206)52.43 
Outstanding as of March 31, 20221,975,485 $38.01