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Preferred Stock - Narrative (Details) - USD ($) $ in Thousands |  | 9 Months Ended |
--- | --- | --- | ---
May 28, 2020 | Sep. 30, 2020 | Dec. 31, 2019
Class of Stock [Line Items] |  |  |
Preferred stock, shares authorized (in shares) |  | 5,000,000 | 5,000,000
Liquidation Amount |  | $ 487,500 |
LIBOR | Beginning on or after August 1, 2025 |  |  |
Class of Stock [Line Items] |  |  |
Basis spread on variable rate |  | 4.262% |
LIBOR | Beginning on or after May 1, 2026 |  |  |
Class of Stock [Line Items] |  |  |
Basis spread on variable rate |  | 4.92% |
LIBOR | Beginning on or after May 1, 2024 |  |  |
Class of Stock [Line Items] |  |  |
Basis spread on variable rate |  | 3.859% |
Series A Preferred Stock |  |  |
Class of Stock [Line Items] |  |  |
Preferred stock, shares authorized (in shares) |  | 1,000 |
Preferred Stock, Shares Outstanding |  | 1,000 |
Liquidation Amount |  | $ 100,000 |
Annual Dividend Rate |  | 6.20% |
Series B Preferred Stock |  |  |
Class of Stock [Line Items] |  |  |
Preferred stock, shares authorized (in shares) |  | 8,625 |
Preferred Stock, Shares Outstanding |  | 8,000 |
Liquidation Amount |  | $ 80,000 |
Annual Dividend Rate |  | 6.625% |
Series C Preferred Stock |  |  |
Class of Stock [Line Items] |  |  |
Preferred stock, shares authorized (in shares) |  | 5,750 |
Preferred Stock, Shares Outstanding |  | 5,750 |
Liquidation Amount |  | $ 57,500 |
Annual Dividend Rate |  | 6.60% |
Series D Preferred Stock |  |  |
Class of Stock [Line Items] |  |  |
Preferred stock, shares authorized (in shares) |  | 10,000 |
Preferred Stock, Shares Outstanding |  | 10,000 |
Liquidation Amount |  | $ 100,000 |
Annual Dividend Rate |  | 6.10% |
Series E Preferred Stock |  |  |
Class of Stock [Line Items] |  |  |
Sale of preferred stock, net | $ 145,000 |  |
Preferred stock, shares authorized (in shares) |  | 1,725 |
Preferred Stock, Shares Outstanding |  | 1,500 |
Liquidation Amount |  | $ 150,000 |
Annual Dividend Rate |  | 6.50% |

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