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Basis of Presentation (Details) $ in Thousands | 1 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2017 building property | Jun. 30, 2018 USD ($) | Dec. 31, 2017 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |  |
Number of properties included in joint venture agreement | property | 1 |  |
Number of buildings included in joint venture agreement | building | 2 |  |
Variable interest entity, consolidated, carrying amount, assets |  | $ 1,080,268 | $ 1,102,986
Variable interest entity, consolidated, carrying amount, liabilities |  | $ 716,127 | $ 720,678

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