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Summary of Significant Accounting Policies - Schedule of variable interest entities (Details) - Operating Partnership - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Variable Interest Entity [Line Items] |  |
Total assets | $ 278,140 | $ 286,512
Total liabilities | 258,864 | 157,776
Property, net |  |
Variable Interest Entity [Line Items] |  |
Total assets | 254,866 | 263,511
Other assets |  |
Variable Interest Entity [Line Items] |  |
Total assets | 23,274 | 23,001
Mortgage notes payable |  |
Variable Interest Entity [Line Items] |  |
Total liabilities | 222,085 | 125,273
Other liabilities |  |
Variable Interest Entity [Line Items] |  |
Total liabilities | $ 36,779 | $ 32,503

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