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Stockholders' Equity - Schedule of Preferred Stock Issued and Outstanding (Details) - USD ($)
 6 Months Ended 12 Months Ended
Jun. 30, 2022
Dec. 31, 2021
Class of Stock [Line Items]    
Preferred stock, carrying value $ 538,221,000 $ 538,221,000
Series D Preferred Stock    
Class of Stock [Line Items]    
Preferred stock, shares authorized (in shares) 8,400,000 8,400,000
Preferred stock, shares issued (in shares) 6,123,495 6,123,495
Preferred stock, shares outstanding (in shares) 6,123,495 6,123,495
Preferred stock, carrying value $ 148,134,000 $ 148,134,000
Preferred stock, liquidation preference $ 153,087,000 $ 153,087,000
Preferred stock, contractual rate, percentage 8.00% 8.00%
Series D Preferred Stock | LIBOR    
Class of Stock [Line Items]    
Preferred stock, floating annual rate, percentage 5.695% 5.695%
Series E Preferred Stock    
Class of Stock [Line Items]    
Preferred stock, shares authorized (in shares) 9,900,000 9,900,000
Preferred stock, shares issued (in shares) 7,411,499 7,411,499
Preferred stock, shares outstanding (in shares) 7,411,499 7,411,499
Preferred stock, carrying value $ 179,349,000 $ 179,349,000
Preferred stock, liquidation preference $ 185,288,000 $ 185,288,000
Preferred stock, contractual rate, percentage 7.875% 7.875%
Series E Preferred Stock | LIBOR    
Class of Stock [Line Items]    
Preferred stock, floating annual rate, percentage 6.429% 6.429%
Series F Preferred Stock    
Class of Stock [Line Items]    
Preferred stock, shares authorized (in shares) 7,750,000 7,750,000
Preferred stock, shares issued (in shares) 5,750,000 5,750,000
Preferred stock, shares outstanding (in shares) 5,750,000 5,750,000
Preferred stock, carrying value $ 138,650,000 $ 138,650,000
Preferred stock, liquidation preference $ 143,750,000 $ 143,750,000
Preferred stock, contractual rate, percentage 6.875% 6.875%
Series F Preferred Stock | Underwritten Public Offering    
Class of Stock [Line Items]    
Preferred stock, liquidation preference per share (in dollars per share) $ 25  
Series F Preferred Stock | LIBOR    
Class of Stock [Line Items]    
Preferred stock, floating annual rate, percentage 6.13% 6.13%
Series G Preferred Stock    
Class of Stock [Line Items]    
Preferred stock, shares authorized (in shares) 5,450,000 3,450,000
Preferred stock, shares issued (in shares) 3,000,000 3,000,000
Preferred stock, shares outstanding (in shares) 3,000,000 3,000,000
Preferred stock, carrying value $ 72,088,000 $ 72,088,000
Preferred stock, liquidation preference $ 75,000,000 $ 75,000,000
Preferred stock, contractual rate, percentage 7.00%  
Preferred Stock, Series Shares    
Class of Stock [Line Items]    
Preferred stock, shares authorized (in shares) 31,500,000 29,500,000
Preferred stock, shares issued (in shares) 22,284,994 22,284,994
Preferred stock, shares outstanding (in shares) 22,284,994 22,284,994
Preferred stock, carrying value $ 538,221,000 $ 538,221,000
Preferred stock, liquidation preference $ 557,125,000 $ 557,125,000