DESCRIPTION OF BUSINESS - Schedule of Reportable Business Segments and Non-Segment Assets (Details) $ in Thousands	3 Months Ended
Mar. 31, 2024 USD ($) segment property	Mar. 31, 2023 USD ($)
Real estate properties
NOI \| $	$ 503,884	$ 465,865
Percentage of Total NOI	100.00%
Number of Properties Held for Sale \| property	1,340
Number of Reportable Segments \| segment	3
Operating Segments \| Senior housing operating portfolio (SHOP)
Real estate properties
Number of Properties Held for Sale \| property	581
Operating Segments \| Outpatient Medical and Research Portfolio
Real estate properties
Number of Properties Held for Sale \| property	429
Operating Segments \| Triple-Net Leased Properties
Real estate properties
Number of Properties Held for Sale \| property	330
Operating Segments \| Senior housing operating portfolio (SHOP)
Real estate properties
NOI \| $	$ 203,483
Operating Segments \| Outpatient Medical and Research Portfolio
Real estate properties
NOI \| $	145,570	136,719
Operating Segments \| Triple-Net Leased Properties
Real estate properties
NOI \| $	151,630	145,943
Non-Segment
Real estate properties
NOI \| $	$ 3,201	$ 15,432
Non-Segment \| Non-Segment
Real estate properties
Percentage of Total NOI	0.60%
Number of Properties Held for Sale \| property	0

The number of real estate properties owned as of the balance sheet date.

No definition available.

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- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-18

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

The net result for the period of deducting interest and other income, property-level operating expenses, and office building services costs from total revenues.

+ References

No definition available.

+ Details

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- Definition

Net Operating Income, Percent

+ References

No definition available.

+ Details

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- Details

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- Details

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