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Senior Living Community Leases and Management Agreements - Narrative (Details) $ in Thousands |  |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 09, 2021 USD ($) community unit | Apr. 01, 2019 USD ($) | Jan. 31, 2021 USD ($) | Dec. 31, 2021 USD ($) trustee option community property lease unit shares | Dec. 31, 2020 USD ($) property community shares | Dec. 31, 2019 USD ($) community property | Jan. 01, 2020 shares | Feb. 01, 2019 USD ($)
Concentration Risk |  |  |  |  |  |  |  |
Common shares, shares issued (in shares) | shares |  |  |  | 238,994,894 | 238,268,478 |  |  |
Gain on lease termination |  |  |  | $ 0 | $ 22,896 | $ 0 |  |
Number of properties owned (property) | property |  |  |  | 390 |  |  |  |
Acquisition and certain other transaction related costs |  |  |  | $ 17,506 | $ 814 | $ 13,102 |  |
ALR |  |  |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |  |  |
Common shares, shares issued (in shares) | shares |  |  |  |  |  |  | 10,268,158 |
Aggregate shares issued (shares) | shares |  |  |  |  |  |  | 16,118,849 |
Senior Living Communities |  |  |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |  |  |
Number of properties owned (property) | property |  |  |  |  | 28 | 25 |  |
Number of units in real estate property | unit |  |  |  | 27,672 |  |  |  |
Five Star | Minimum |  |  |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |  |  |
Management fees as a percentage of gross revenues |  |  |  | 5.00% |  |  |  |
Construction supervision fee |  |  |  | 3.00% |  |  |  |
Property management agreement, management fees |  |  |  | 70.00% |  |  |  |
Five Star | Maximum |  |  |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |  |  |
Management fees as a percentage of gross revenues |  |  |  | 6.00% |  |  |  |
Construction supervision fee |  |  |  | 5.00% |  |  |  |
Property management agreement, management fees |  |  |  | 80.00% |  |  |  |
Five Star | Investor | Minimum |  |  |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |  |  |
Percentage of annual incentive fee |  |  |  | 15.00% |  |  |  |
Five Star | Investor | Maximum |  |  |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |  |  |
Percentage of annual incentive fee |  |  |  | 25.00% |  |  |  |
Affiliated Entity | ALR |  |  |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |  |  |
Number of communities managed | community |  |  |  |  |  | 78 |  |
Affiliated Entity | Five Star |  |  |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |  |  |
Number of communities leased by the company | community |  |  |  |  |  | 166 |  |
Amounts of transaction |  |  |  |  | $ 75,000 | $ 137,898 |  |
Gain on lease termination |  |  |  |  | 22,896 |  |  |
Monthly minimum rent payable |  |  |  |  |  |  |  | $ 11,000
Payments to acquire property, plant, and equipment |  |  |  |  |  | 49,155 |  |
Management fees as a percentage of gross revenues |  |  |  | 5.00% |  |  |  |
Percentage of annual incentive fee |  |  |  | 15.00% |  |  |  |
Consumer price index annual estimated increase |  |  |  | 2.00% |  |  |  |
Trigger basis for capital investment ratio (percent) |  |  |  | 6.00% |  |  |  |
Business and property management agreement, number of agreements | option |  |  |  | 2 |  |  |  |
Renewal term (years) |  |  |  | 5 years |  |  |  |
Number of leases with related party | lease |  |  |  | 5 |  |  |  |
Amount of improvements to communities |  |  |  |  |  | 111,603 |  |
Expenses from property management agreement transactions with related party |  |  |  | $ 47,479 | 62,880 | $ 15,327 |  |
Related party transaction capitalized amount |  |  |  | 3,615 | 2,467 |  |  |
Payments made in exchange for customary release |  |  | $ 5,763 |  |  |  |  |
Refunded management fees |  |  | $ 115 |  |  |  |  |
Lease income |  |  |  | 1,591 | 1,561 |  |  |
Affiliated Entity | Five Star | Property Operating Expense |  |  |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |  |  |
Expenses from property management agreement transactions with related party |  |  |  | $ 43,864 | $ 60,413 |  |  |
Affiliated Entity | Five Star | Senior Living Communities |  |  |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |  |  |
Number of communities managed | community |  |  |  | 120 | 235 | 78 |  |
Expenses from transactions with related party |  |  |  | $ 11,233 | $ 25,687 | $ 5,920 |  |
Number of real estate properties inadequate documentation | trustee |  |  |  | 1 |  |  |  |
Five Star | Senior Living Communities |  |  |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |  |  |
Number of properties owned (property) | community | 120 |  |  |  |  |  |  |
Related party transactions, termination percentage | 10.00% |  |  |  |  |  |  |
Percentage of EBITDA threshold for contract termination | 80.00% |  |  |  |  |  |  |
Five Star | Five Star |  |  |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |  |  |
Payments to acquire property, plant, and equipment |  |  |  |  |  | 49,155 |  |
Amount of improvements to communities |  |  |  |  |  | 111,603 |  |
Five Star | Affiliated Entity | Five Star |  |  |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |  |  |
Annual rent as a percentage of gross revenues, percent |  |  |  | 4.00% |  |  |  |
Annual rent as a percentage of gross revenues, amount |  |  |  |  |  | $ 538 |  |
Disposal Group, Held-for-sale, Not Discontinued Operations | Senior Living Communities |  |  |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |  |  |
Number of properties owned (property) | property |  |  |  |  | 10 | 2 |  |
Number of units in real estate property | property |  |  |  |  | 820 |  |  |
Disposal Group, Held-for-sale, Not Discontinued Operations | Five Star | Senior Living Communities |  |  |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |  |  |
Amounts of transaction | $ 682,000 |  |  |  |  |  |  |
Number of properties owned (property) | community | 108 |  |  | 108 |  |  |  |
Number of units in real estate property | unit | 1,500 |  |  |  |  |  |  |
Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations | Five Star | Senior Living Communities |  |  |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |  |  |
Amounts of transaction |  |  |  | $ 17,363 |  |  |  |
Number of units in real estate property | unit |  |  |  | 7,340 |  |  |  |
Acquisition and certain other transaction related costs |  |  |  | $ 13,311 |  |  |  |
Number of properties transitioned | community |  |  |  | 107 |  |  |  |
Five Star | Senior Living Communities |  |  |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |  |  |
Payments to acquire property, plant, and equipment |  | $ 49,155 |  |  |  |  |  |
Scenario, Adjustment | Senior Living Communities |  |  |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |  |  |
Number of properties owned (property) | property |  |  |  | 10 |  |  |  |
Scenario, Adjustment | Disposal Group, Held-for-sale, Not Discontinued Operations | Five Star | Senior Living Communities |  |  |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |  |  |
Number of units in real estate property | unit | 7,500 |  |  |  |  |  |  |
Residents fees and services | SHOP | Affiliated Entity | Five Star |  |  |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |  |  |
Revenue reserve for inadequate documentation |  |  |  |  | $ 3,842 |  |  |
Penalties for inadequate documentation |  |  |  |  | $ 1,921 |  |  |

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