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Shareholders' Equity - Share Awards (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Share Award Plan |  |  |  |
Distributions |  |  |  |
Common shares reserved for issuance (in shares) | 1,661,921 |  |  |
Award Plans |  |  |  |
Distributions |  |  |  |
Unvested (in shares) | 1,695,034 | 1,024,441 | 609,960 | 588,830
Vest in 2026 (in shares) | 531,023 |  |  |
Vest in 2027 (in shares) | 465,784 |  |  |
Vest in 2028 (in shares) | 415,830 |  |  |
Vest in 2029 (in shares) | 282,397 |  |  |
Estimated future compensation expense for unvested shares | $ 5,346 |  |  |
Weighted average period over which the compensation expense (in months) | 24 months |  |  |
Compensation expense | $ 3,712 | $ 3,620 | $ 3,417 |
Officers and Employees of RMR | Common Stock |  |  |  |
Distributions |  |  |  |
Vesting period (in installments) | 5 years |  |  |

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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section S45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479983/718-10-S45-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479830/718-10-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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