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Distributions - Tax Characteristics of Distributions (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Distributions [Abstract] |  |  |
Common Share Distributions Payments of Ordinary Dividends | $ 0.55 | $ 0.38 | $ 0
Common Share Distributions Capital Gain | 0 | 0.26 | 0.62
Common Share Distributions Non-taxable Distributions | 0.17 | 0 | 0
Common Stock, Dividends, Per Share, Paid | $ 0.72 | $ 0.64 | $ 0.62
Percentage Of Distributions classified as ordinary income | 76.20% | 60.00% | 0.00%
Percentage Of Distributions classified as capital gain | 0.00% | 40.00% | 100.00%
Percentage Of Distributions classified as non-taxable distribution | 23.80% | 0.00% | 0.00%
Dividends, Preferred Stock | $ 0 | $ 2,032 | $ 6,900
Percentage Of Preferred Distributions classified as ordinary income | 0.00% | 60.00% | 0.00%
Percentage Of Preferred Distributions classified as capital gain | 0.00% | 40.00% | 100.00%
Percentage Of Preferred Distributions classified as non-taxable distribution | 0.00% | 0.00% | 0.00%

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