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Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Thousands | Jan. 16, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
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Statement of Cash Flows [Abstract] |  |  |  |
Accrued distributions payable |  | $ 5,667 | $ 5,846 | $ 4,700
Accrued but unpaid distribution |  | 500 | 800 | 500
Accounts payable and accrued expenses |  | 2,400 | 2,400 | 2,000
Accrued share based compensation |  | $ 500 | $ 500 | $ 600
Subsequent Event |  |  |  |
Shares issued pursuant to equity incentive plan (in shares) | 27,870 |  |  |

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