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Summary of Significant Accounting Policies - Leasing Costs and Revenue Recognition (Details) | 12 Months Ended
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Dec. 31, 2022 USD ($) community | Dec. 31, 2021 USD ($) community | Dec. 31, 2020 USD ($)
DEFERRED LEASING COSTS |  |  |
Unamortized gross balance of deferred leasing costs | $ 55,043,000 | $ 64,255,000 |
Accumulated amortization | $ 15,482,000 | 17,074,000 |
Weighted average amortization period for deferred leasing cost | 8 years 1 month 6 days |  |
Expected amortization expense for the five years |  |  |
Expected amortization expense, 2023 | $ 6,652,000 |  |
Expected amortization expense, 2024 | 5,840,000 |  |
Expected amortization expense, 2025 | 5,379,000 |  |
Expected amortization expense, 2026 | 4,805,000 |  |
Expected amortization expense, 2027 | 3,781,000 |  |
Expected amortization expense, thereafter | 13,104,000 |  |
Percentage rents earned | 2,978,000 | 1,993,000 | $ 2,144,000
Proceeds from the relief fund amount | 605,000 | 20,800,000 | 19,961,000
Interest and other income | 15,929,000 | 20,635,000 | 18,221,000
Provider relief fund other liabilities | $ 0 | $ 3,722,000 | 2,476,000
Senior Living Communities |  |  |
Expected amortization expense for the five years |  |  |
Number of communities managed | community | 111 | 107 |
SHOP |  |  |
Expected amortization expense for the five years |  |  |
Interest and other income | $ 4,327,000 | $ 19,554,000 |
SHOP | Operating Segments |  |  |
Expected amortization expense for the five years |  |  |
Interest and other income |  |  | $ 17,485,000
Third Party Managers | Senior Living Communities |  |  |
Expected amortization expense for the five years |  |  |
Number of communities managed | community | 237 |  |

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- Definition Represents the weighted average amortization period for deferred leasing costs. + References No definition available. + Details
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- Definition For an unclassified balance sheet, the accumulated amortization, as of the reporting date, which represents the periodic charge to earnings of initial direct costs which have been deferred and are being allocated over the lease term in proportion to the recognition of rental income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 25 -Paragraph 10 -URI https://asc.fasb.org/extlink&oid=123408481&loc=SL77919138-209958 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 25 -Paragraph 16 -URI https://asc.fasb.org/extlink&oid=123394419&loc=d3e40588-112709 Reference 3: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 35 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=123394697&loc=d3e40879-112712 + Details
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- Definition For an unclassified balance sheet, this element represents costs incurred by the lessor that are (a) costs to originate a lease incurred in transactions with independent third parties that (i) result directly from and are essential to acquire that lease and (ii) would not have been incurred had that leasing transaction not occurred and (b) certain costs directly related to specified activities performed by the lessor for that lease. Those activities are: evaluating the prospective lessee's financial condition; evaluating and recording guarantees, collateral, and other security arrangements; negotiating lease terms; preparing and processing lease documents; and closing the transaction. This amount is before considering accumulated amortization representing the periodic charge to earnings to recognize the deferred costs over the term of the related lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 25 -Paragraph 10 -URI https://asc.fasb.org/extlink&oid=123408481&loc=SL77919138-209958 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 25 -Paragraph 17 -URI https://asc.fasb.org/extlink&oid=123394419&loc=d3e40246-112709 Reference 3: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 25 -Paragraph 16 -URI https://asc.fasb.org/extlink&oid=123394419&loc=d3e40588-112709 + Details
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