Shareholders' Equity - Schedule of Share Awarded to Trustees, Officers and Other Employees of RMR (Details) - Share Award Plans - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares (in shares)	1,031,329	438,000	433,500
Weighted Average Grant Date Fair Value (in dollars per share)	$ 4.50	$ 7.88	$ 6.63
Weighted Average Value of Grants	$ 4,641	$ 3,451	$ 2,874