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Subsequent Events (Narrative) (Details) - $ / shares
12 Months Ended
Feb. 01, 2022
Jan. 14, 2022
Dec. 13, 2021
Dec. 31, 2021
Dec. 31, 2020
Subsequent Event [Line Items]          
Dividend declared, date     Dec. 13, 2021    
Subsequent event          
Subsequent Event [Line Items]          
Dividends payable, date to be paid Feb. 01, 2022        
Dividend, record date   Jan. 14, 2022      
Preferred stock, dividends per share, cash paid $ 0.15        
6% convertible exchangeable preferred stock          
Subsequent Event [Line Items]          
Preferred stock dividend declared, amount per share       $ 0.15  
Preferred stock, dividend rate (in percent)       6.00% 6.00%