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Stockholders' Equity (Dividends) (Details) - USD ($) |  | 3 Months Ended
--- | --- | ---
Jan. 23, 2012 | Mar. 31, 2019 | Mar. 31, 2018
Cash Dividends [Abstract] |  |  |
Cash dividend paid |  | $ 1,075,000 | $ 0
Dividend payable to holders, per share |  | $ 0.06 |
Dividends declared |  | $ 150 | $ 0
Dividend Reinvestment Plan [Abstract] |  |  |
Registered shares of common stock pursuant to Plan (in shares) | 3,000,000 |  |
Percentage of purchase price per share (in hundredths) | 95.00% |  |
Sales price per share (in dollars per share) | $ 9.50 |  |
Payment of sales commission or dealer manager fee | $ 0 |  |
Notice period for amendments to Plan |  | 30 days |
Common stock issued under plan |  | $ 17,400,000 |
Common stock issued under plan (in shares) |  | 1,834,147 |
Stock issued during period, shares plan |  | 0 |

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