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Stockholders' Equity of the Company - Schedule of Common Stock Issued and Proceeds Received Dividend Reinvestments (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Feb. 28, 2018
Stockholders' Equity |  |  |  |
Common stock, shares authorized (in shares) | 160,000,000 | 160,000,000 |  |
Dividend Reinvestment and Stock Purchase Plan (DRIP) |  |  |  |
Stockholders' Equity |  |  |  |
Common stock, shares authorized (in shares) |  |  |  | 3,500,000
Issuance of common stock (in shares) | 3,867 | 1,399 | 2,141 |
Dividend reinvestments/stock purchases under the DRSPP | $ 334 | $ 136 | $ 223 |

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