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Stockholders' Equity - Cash Dividends Declared - Preferred Stock (Details) - $ / shares
Apr. 15, 2021
Jan. 15, 2021
Oct. 15, 2020
Jul. 15, 2020
Series B Preferred Stock        
Dividends Payable [Line Items]        
Cash Dividend Per Share (in dollars per share)   $ 0.484375 $ 0.484375 $ 0.968750
Series B Preferred Stock | Subsequent Event        
Dividends Payable [Line Items]        
Cash Dividend Per Share (in dollars per share) $ 0.484375      
Series C Preferred Stock        
Dividends Payable [Line Items]        
Cash Dividend Per Share (in dollars per share)   0.4921875 0.4921875 0.9843750
Series C Preferred Stock | Subsequent Event        
Dividends Payable [Line Items]        
Cash Dividend Per Share (in dollars per share) 0.4921875      
Series D Preferred Stock        
Dividends Payable [Line Items]        
Cash Dividend Per Share (in dollars per share)   0.50 0.50 1.00
Series D Preferred Stock | Subsequent Event        
Dividends Payable [Line Items]        
Cash Dividend Per Share (in dollars per share) 0.50      
Series E Preferred Stock        
Dividends Payable [Line Items]        
Cash Dividend Per Share (in dollars per share)   $ 0.4921875 $ 0.4921875 $ 0.9843750
Series E Preferred Stock | Subsequent Event        
Dividends Payable [Line Items]        
Cash Dividend Per Share (in dollars per share) $ 0.4921875