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Senior Living Community Management Agreements - Narrative (Details) $ in Thousands |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Oct. 31, 2022 USD ($) | Jun. 09, 2021 USD ($) community unit | Dec. 31, 2023 USD ($) property unit | Dec. 31, 2023 USD ($) community property option unit | Dec. 31, 2022 USD ($) community | Dec. 31, 2021 USD ($) community unit
Concentration Risk |  |  |  |  |  |
Number of properties owned (property) | property |  |  | 371 | 371 |  |
Senior Living Communities |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |
Number of units in real estate property | unit |  |  | 27,271 | 27,271 |  |
Related Party | Five Star |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |
Management fees as a percentage of gross revenues |  |  | 5.00% | 5.00% |  |
Percentage of annual incentive fee |  |  | 15.00% | 15.00% |  |
Consumer price index annual estimated increase |  |  | 2.00% | 2.00% |  |
Trigger basis for capital investment ratio (percent) |  |  | 6.00% | 6.00% |  |
Business and property management agreement, number of agreements | option |  |  |  | 2 |  |
Renewal term (years) |  |  |  | 5 years |  |
Expenses from property management agreement transactions with related party |  |  |  | $ 40,119 | $ 37,037 | $ 47,479
Related party transaction capitalized amount |  |  |  | 2,683 | 3,300 | 3,615
Related Party | Five Star | Property Operating Expense |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |
Expenses from property management agreement transactions with related party |  |  |  | $ 37,436 | $ 33,737 | $ 43,864
Related Party | Five Star | Senior Living Communities |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |
Number of properties owned (property) | community |  | 120 |  |  |  |
Number of real estate properties managed | community |  | 119 |  |  |  |
Related party transactions, termination percentage |  | 10.00% |  |  |  |
Percentage of EBITDA threshold for contract termination |  | 80.00% |  |  |  |
Number of communities managed | community |  |  |  | 119 | 119 | 120
Related Party | Third Party Managers |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |
Management fees payable to third parties |  |  |  | $ 21,863 | $ 20,739 | $ 6,239
Related Party | Third Party Managers | Senior Living Communities |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |
Management agreement, extension term |  |  |  | 2 years |  |
Number of communities managed | community |  |  |  | 113 | 111 | 107
Termination fees paid |  |  | $ 1,000 |  |  |
Management agreement, term |  |  |  | 5 years |  |
Related Party | Third Party Managers | Senior Living Communities | Minimum |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |
Management fees as a percentage of gross revenues |  |  | 5.00% | 5.00% |  |
Percentage of annual incentive fee |  |  | 15.00% | 15.00% |  |
Construction supervision fee |  |  | 3.00% | 3.00% |  |
Property management agreement, management fees |  |  | 70.00% | 70.00% |  |
Related Party | Third Party Managers | Senior Living Communities | Maximum |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |
Management fees as a percentage of gross revenues |  |  | 6.00% | 6.00% |  |
Percentage of annual incentive fee |  |  | 25.00% | 25.00% |  |
Construction supervision fee |  |  | 5.00% | 5.00% |  |
Property management agreement, management fees |  |  | 80.00% | 80.00% |  |
Five Star Management | Related Party |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |
Termination fees paid | $ 350 |  |  |  |  |
Five Star Management | Related Party | Five Star |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |
Management agreement, extension term |  | 2 years |  |  |  |
Rehabilitation Services | Related Party | Five Star | Senior Living Communities |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |
Amounts of transaction |  |  |  | $ 1,213 | $ 6,289 | $ 11,233
Disposal Group, Held-for-sale, Not Discontinued Operations | Related Party | Five Star | Senior Living Communities |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |
Number of properties owned (property) | community |  | 108 |  |  |  | 108
Number of units in real estate property | unit |  | 1,500 |  |  |  |
Amounts of transaction |  | $ 682,000 |  |  |  |
Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations | Related Party | Five Star | Senior Living Communities |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |
Number of units in real estate property | unit |  |  |  |  |  | 7,340
Amounts of transaction |  |  |  | $ 0 | $ 2,096 | $ 17,363
Number of properties transitioned | community |  |  |  |  |  | 107
Scenario, Adjustment | Disposal Group, Held-for-sale, Not Discontinued Operations | Related Party | Five Star | Senior Living Communities |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |
Number of units in real estate property | unit |  | 7,500 |  |  |  |

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