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Share-based Compensation Plans (Tables)
12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement [Abstract]  
Summary of restricted stock or restricted stock unit activity Table 15.1 summarizes restricted stock or restricted stock unit (collectively called “restricted stock”) activity during 2021.
Restricted stock
Table
15.1
 Weighted Average Grant Date Fair Market ValueShares
Restricted stock outstanding at December 31, 2020$13.57 4,139,243 
Granted (1)
12.83 1,370,542 
Vested14.97 (1,330,129)
Forfeited13.87 (33,568)
Restricted stock outstanding at December 31, 2021$12.88 4,146,088 
(1) Approximately 71% of the shares granted in 2021 are subject to performance conditions under which the target number of shares granted may vest up to 200%.