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Noncontrolling Interest (Details) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 USD ($) property | Mar. 31, 2020 USD ($)
Noncontrolling Interest |  |
Net income attributable to noncontrolling interest | $ (1,322) | $ (1,408)
Cash distribution for joint venture partners | 5,694 | $ 5,767
Variable interest entity, consolidated, carrying amount, real estate assets | 700,192 |
Variable interest entity, consolidated, carrying amount, mortgage debt | $ 620,000 |
Joint Venture |  |
Noncontrolling Interest |  |
Ownership percentage by noncontrolling owners | 45.00% |
Ownership percentage | 55.00% |
Boston, MA | Life Science Building | Joint Venture |  |
Noncontrolling Interest |  |
Number of properties included in joint venture agreement | property | 1 |

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