Amount classified as assets attributable to disposal group held for sale or disposed of.

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DISPOSITIONS AND IMPAIRMENTS - Real Estate Assets Held For Sale (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($) property	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($) property
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of Properties Held for Sale \| property	1,340
Assets held for sale	$ 41,317		$ 56,489
Liabilities related to assets held for sale	7,605		9,243
Gain on real estate dispositions	341	$ 10,201
SHOP
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets held for sale	32,018		48,173
Liabilities related to assets held for sale	5,677		6,419
Outpatient Medical and Research Portfolio
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets held for sale	3,531		5,431
Liabilities related to assets held for sale	1,559		2,643
Triple-Net Leased Properties
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets held for sale	5,768		2,885
Liabilities related to assets held for sale	$ 369		$ 181
Disposal Group, Held-for-sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of Properties Classified as Held-for-sale \| property	24		17
Disposal Group, Held-for-sale, Not Discontinued Operations \| SHOP
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of Properties Classified as Held-for-sale \| property	11		13
Disposal Group, Held-for-sale, Not Discontinued Operations \| Outpatient Medical and Research Portfolio
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of Properties Classified as Held-for-sale \| property	1		3
Disposal Group, Held-for-sale, Not Discontinued Operations \| Triple-Net Leased Properties
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of Properties Classified as Held-for-sale \| property	12		1