Business and Property Management Agreements with RMR - Narrative (Details)	1 Months Ended	12 Months Ended
	Jan. 31, 2025 USD ($)	Dec. 31, 2025 USD ($) employee agreement jointVenture property lease	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Related Party Transaction
Number of employees | employee		0
Incentive management fees		$ 17,905,000	$ 0	$ 0
Number of medical office and life science properties | property		10
RMR LLC
Related Party Transaction
Incentive management fees		$ 17,905,000	$ 0	$ 0
Percentage of property management fees payable		3.00%
Construction supervision fees payable under property management agreement as a percentage of construction costs		5.00%
Period over which transition services will be provided by the related party after termination of the agreement		120 days
Credit agreement and related security agreement amount	$ 100,000,000
Period to cure default	30 days
RMR LLC | 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 LLC | 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 LLC | 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 LLC | Amended Agreement | Minimum
Related Party Transaction
Incentive management fee reduction, basis spread		2.00%
RMR LLC | Amended Agreement | Minimum | Up C Transaction
Related Party Transaction
Termination fee term		19 years
RMR LLC | Amended Agreement | Maximum
Related Party Transaction
Incentive management fee reduction, basis spread		5.00%
RMR LLC | Amended Agreement | Maximum | Up C Transaction
Related Party Transaction
Termination fee term		20 years
RMR
Related Party Transaction
Number of joint venture arrangements | jointVenture		2
Senior Living Communities | RMR
Related Party Transaction
Number of consecutive renewal terms of agreement | agreement		2