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Shareholders' Equity (Tables)
12 Months Ended
Dec. 31, 2020
Equity [Abstract]  
Schedule of Stock by Class
Share activity during the year ended December 31, 2020 is as follows:
Preferred Stock Series FCommon Stock IssuedTreasury Stock HeldCommon Stock Outstanding
Balance at January 1, 20206,000 93,686,311 1,659,749 92,026,562 
Restricted share activity— — (266,325)266,325 
Stock options exercised— — (10,230)10,230 
Common stock repurchased— — 2,104,195 (2,104,195)
Balance at December 31, 20206,000 93,686,311 3,487,389 90,198,922