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Business and Property Management Agreements with RMR (Details) | 1 Months Ended | 12 Months Ended |  |
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Jun. 30, 2022 | Dec. 31, 2021 USD ($) | Dec. 31, 2022 USD ($) employee property lease agreement jointVenture | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Jun. 28, 2022 | Mar. 31, 2017
Related Party Transaction |  |  |  |  |  |  |
Number of employees | employee |  |  | 0 |  |  |  |
Professional fees |  |  | $ 12,901,000 | $ 13,161,000 | $ 13,805,000 |  |
Number of medical office and life science properties | property |  |  | 10 |  |  |  |
RMR |  |  |  |  |  |  |
Related Party Transaction |  |  |  |  |  |  |
Number of joint venture arrangements | jointVenture |  |  | 2 |  |  |  |
Joint Venture | Seaport Innovation LLC |  |  |  |  |  |  |
Related Party Transaction |  |  |  |  |  |  |
Additional equity joint venture percentage | 10.00% | 35.00% |  |  |  |  |
Equity method investment ownership percentage | 20.00% | 20.00% | 10.00% | 20.00% |  | 20.00% | 55.00%
Joint Venture | The LSMD Fund REIT LLC |  |  |  |  |  |  |
Related Party Transaction |  |  |  |  |  |  |
Equity method investment ownership percentage |  |  | 20.00% |  |  |  |
Reit Management And Research |  |  |  |  |  |  |
Related Party Transaction |  |  |  |  |  |  |
Number of medical office and life science properties | property |  |  | 10 |  |  |  |
RMR |  |  |  |  |  |  |
Related Party Transaction |  |  |  |  |  |  |
Business management fees incurred |  |  | $ 16,646,000 | $ 23,378,000 | 20,629,000 |  |
Recognized amortization of the liability |  |  | $ 2,974,000 | 2,974,000 | 2,974,000 |  |
Percentage of property management fees payable |  |  | 3.00% |  |  |  |
Construction supervision fees payable under property management agreement as a percentage of construction costs |  |  | 5.00% |  |  |  |
Property management and construction supervision fees |  |  | $ 10,329,000 | 12,504,000 | 13,802,000 |  |
Amortization of liability related to property management and construction supervision fees |  |  | 797,000 | 797,000 | 797,000 |  |
Party transaction property management and construction supervision fees capitalized |  | $ 2,820,000 | $ 4,672,000 | 2,820,000 | 3,718,000 |  |
Period over which transition services will be provided by the related party after termination of the agreement |  |  | 120 days |  |  |  |
RMR | Operating Expense |  |  |  |  |  |  |
Related Party Transaction |  |  |  |  |  |  |
Property management and construction supervision fees |  |  | $ 5,657,000 | $ 9,684,000 | $ 10,084,000 |  |
RMR | Senior Living Communities |  |  |  |  |  |  |
Related Party Transaction |  |  |  |  |  |  |
Number of consecutive renewal terms of agreement | agreement |  |  | 2 |  |  |  |
RMR | Amended Agreement |  |  |  |  |  |  |
Related Party Transaction |  |  |  |  |  |  |
Base management fee payable as a percentage of average historical cost of real estate investments, excluding transferred assets for investments exceeding specified amount |  |  | 0.50% |  |  |  |
Base management fee payable as a percentage of average historical cost of real estate investments, excluding transferred assets for investments up to specified amount |  |  | 0.70% |  |  |  |
Threshold amount of other real estate investments for payment of base management fee |  |  | $ 250,000,000 |  |  |  |
Base management fee payable as a percentage of average market capitalization exceeding specified amount |  |  | 0.50% |  |  |  |
Threshold amount of average market capitalization for payment of base management fee |  |  | $ 250,000,000 |  |  |  |
Base management fee payable as a percentage of average closing price per share of common shares on NYSE |  |  | 0.70% |  |  |  |
Base management fee payable as a percentage of aggregate book value of real estate assets or transferred assets |  |  | 0.50% |  |  |  |
Incentive management fee payable (as a percent) |  |  | 12.00% |  |  |  |
Period of measurement |  |  | 3 years |  |  |  |
Top consecutive trading days |  |  | 10 days |  |  |  |
Consecutive trading days |  |  | 30 days |  |  |  |
Management agreement incentive fee payable |  |  | $ 0 |  |  |  |
Incentive management fee cap on common shares |  |  | 1.50% |  |  |  |
RMR | Amended Agreement | Up C Transaction |  |  |  |  |  |  |
Related Party Transaction |  |  |  |  |  |  |
Number of business days notice for termination of property management agreement for convenience by the related party |  |  | 60 days |  |  |  |
Window for providing notice of termination of property management agreement for performance by the related party |  |  | 60 days |  |  |  |
Window for providing notice of termination of property management agreement for change of control by the related party |  |  | 12 months |  |  |  |
Number of terminated management agreements for convenience before termination fee is incurred | lease |  |  | 1 |  |  |  |
Number of RMR LLC terminated management agreements for good cause before termination fee is incurred | lease |  |  | 1 |  |  |  |
Number of terminated management agreements for a performance reason before termination fee is incurred | lease |  |  | 1 |  |  |  |
Termination fee remaining term assumption |  |  | 10 years |  |  |  |
RMR | Minimum | Amended Agreement | Up C Transaction |  |  |  |  |  |  |
Related Party Transaction |  |  |  |  |  |  |
Termination fee term |  |  | 19 years |  |  |  |
RMR | Maximum |  |  |  |  |  |  |
Related Party Transaction |  |  |  |  |  |  |
Threshold amount of real estate investments for payment of base management fee |  |  | $ 250,000,000 |  |  |  |
Base management fee payable, average market capitalization |  |  | $ 250,000,000 |  |  |  |
RMR | Maximum | Amended Agreement | Up C Transaction |  |  |  |  |  |  |
Related Party Transaction |  |  |  |  |  |  |
Termination fee term |  |  | 20 years |  |  |  |
RMR | SNL US REIT Healthcare Index | Minimum | Amended Agreement |  |  |  |  |  |  |
Related Party Transaction |  |  |  |  |  |  |
Incentive management fee reduction, basis spread |  |  | 2.00% |  |  |  |
RMR | SNL US REIT Healthcare Index | Maximum | Amended Agreement |  |  |  |  |  |  |
Related Party Transaction |  |  |  |  |  |  |
Incentive management fee reduction, basis spread |  |  | 5.00% |  |  |  |

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