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Shareholders' Equity - Allocations of Dividends and Declared and Paid for Income Tax Purposes (Details) - $ / shares
 12 Months Ended
Apr. 16, 2019
Dec. 31, 2019
Shareholders Equity [Line Items]    
Common stock cash dividends per share $ 0.075  
Common Stock    
Shareholders Equity [Line Items]    
Dividends declared   $ 0.15
Allocations   100.00%
Common Stock | Return of capital    
Shareholders Equity [Line Items]    
Allocations   100.00%
Preferred Stock    
Shareholders Equity [Line Items]    
Allocations [1]   100.00%
Preferred Stock | Return of capital    
Shareholders Equity [Line Items]    
Allocations [1]   100.00%
Series D Preferred Stock    
Shareholders Equity [Line Items]    
Dividends declared   $ 13.83
Series E Preferred Stock    
Shareholders Equity [Line Items]    
Dividends declared   $ 12.42
[1] The allocations for income tax purposes are the same for each series of preferred stock for each period presented.