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DISPOSITIONS AND IMPAIRMENTS - Assets Held For Sale and Impairment (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2024 USD ($) property	Dec. 31, 2023 USD ($) property	Dec. 31, 2022 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets Held for Sale	$ 18,625	$ 56,489
Liabilities Related to Assets Held for Sale	2,726	9,243
SHOP
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets Held for Sale	18,612	48,173
Liabilities Related to Assets Held for Sale	2,158	6,419
NNN
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets Held for Sale	0	2,885
Liabilities Related to Assets Held for Sale	0	181
Outpatient Medical Buildings And Other
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Assets Held for Sale	13	5,431
Liabilities Related to Assets Held for Sale	$ 568	$ 2,643
Disposal Group, Held-for-sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Segment Properties Held for Sale \| property	2	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]
Segment Properties Held for Sale \| property	2	13
Disposal Group, Held-for-sale, Not Discontinued Operations \| NNN
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Segment Properties Held for Sale \| property	0	1
Disposal Group, Held-for-sale, Not Discontinued Operations \| Outpatient Medical Buildings And Other
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Segment Properties Held for Sale \| property	0	3
Depreciation and amortization
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Real estate impairments	$ (86,000)	$ 226,600	$ 107,800
Depreciation and amortization \| NNN
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Real estate impairments	40,700	16,900	3,900
Depreciation and amortization \| SHOP
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Real estate impairments	43,800	190,500	76,400
Depreciation and amortization \| OM&R
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Real estate impairments	$ 1,500	$ 19,200	$ 27,500