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Noncontrolling Interest (Details) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 USD ($) | Jun. 30, 2018 USD ($) | Jun. 30, 2019 USD ($) building property | Jun. 30, 2018 USD ($)
Noncontrolling Interest [Line Items] |  |  |  |
Comprehensive income attributable to noncontrolling interest | $ (1,413) | $ (1,401) | $ (2,835) | $ (2,784)
Cash distribution for joint venture partners | 5,684 | $ 5,114 | 11,187 | $ 10,781
Variable interest entity, consolidated, carrying amount, real estate assets | 735,133 |  | 735,133 |
Variable interest entity, consolidated, carrying amount, mortgage debt | $ 620,000 |  | $ 620,000 |
Joint Venture |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |
Ownership percentage by noncontrolling owners | 45.00% |  | 45.00% |
Ownership percentage | 55.00% |  | 55.00% |
Massachusetts | MOBs | Joint Venture |  |  |  |
Noncontrolling Interest [Line Items] |  |  |  |
Number of properties included in joint venture agreement | property |  |  | 1 |
Number of buildings included in joint venture agreement | building |  |  | 2 |

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