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Stockholders' Equity of the Company - At-the-Market Equity Offering Program and Perpetual Preferred Stock (Details) - USD ($) $ / shares in Units, $ in Millions | 1 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Aug. 31, 2012 | Jun. 30, 2024 | Feb. 29, 2024 | Dec. 31, 2023
Stockholders' Equity |  |  |  |
Common stock, shares authorized (in shares) |  | 160,000,000 |  | 160,000,000
Series I Preferred Stock |  |  |  |
Stockholders' Equity |  |  |  |
Preferred stock, shares outstanding (in shares) |  | 9,200,000 |  | 9,200,000
Preferred stock, distribution rate |  | 6.50% |  |
Perpetual preferred stock, liquidation preference (in dollars per share) |  | $ 25.00 |  | $ 25.00
Perpetual preferred stock, annual dividends per share (in dollars per share) |  | $ 1.625 |  |
Contributions of net proceeds from sale of preferred stock | $ 221.9 |  |  |
Dividend Reinvestment and Stock Purchase Plan (DRIP) |  |  |  |
Stockholders' Equity |  |  |  |
Common stock, shares authorized (in shares) |  |  | 3,500,000 |

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