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Subsequent Events (Narrative) (Details) - 6% Convertible Exchangeable Preferred Stock [Member] - $ / shares
Aug. 01, 2020
Jun. 25, 2020
Subsequent Event [Line Items]    
Dividend declared, date   Jun. 25, 2020
Preferred stock dividend declared, amount per share   $ 0.15
Subsequent Events [Member]    
Subsequent Event [Line Items]    
Dividends payable, date to be paid Aug. 01, 2020  
Dividend, record date Jul. 17, 2020  
Preferred stock, dividends per share, cash paid $ 0.15