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Income Taxes (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income Tax Disclosure [Abstract] |  |  |
REIT taxable income | $ 21,332 | $ 21,702 | $ 52,964
Operating Loss Carryforwards | $ 89,775 |  |
Operating Loss Carryforwards, Limitations on Use | Because the Company incurred an "ownership change" under Section 382 of the Internal Revenue Code ("Section 382"), the Company's ability to utilize its NOL carryforward to offset its taxable income after any required dividend distributions is limited to approximately $13,451 per year with any unused amounts being accumulated and carried forward for use in subsequent years. As of December 31, 2017, the Company had $52,092 of NOL that is not subject to the existing Section 382 limitations available to offset any future taxable income. The NOL will expire beginning in 2020 to the extent it is not used. |  |

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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319 + Details
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- Definition A description of the limitations on the use of all operating loss carryforwards available to reduce future taxable income. + References No definition available. + Details
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