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Stockholders' Equity (DRIP) (Details) - USD ($) $ in Thousands | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019 | Feb. 28, 2018
Class of Stock [Line Items] |  |  |  |
Common stock, shares authorized (in shares) | 375,000,000 |  | 375,000,000 |
Net proceeds | $ 54,084 | $ 87,978 |  |
DRIP |  |  |  |
Class of Stock [Line Items] |  |  |  |
Common stock, shares authorized (in shares) |  |  |  | 10,000,000
Shares of common stock (in shares) | 33,246 | 137,316 |  |
Net proceeds | $ 1,321 | $ 7,166 |  |

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