DISPOSITIONS AND IMPAIRMENTS - Narrative (Details) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Oct. 31, 2024 USD ($) property	Sep. 30, 2024 USD ($) property	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) property	Sep. 30, 2023 USD ($)	Dec. 31, 2023 property
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of real estate properties		1,319		1,319
Proceeds from real estate disposals | $				$ 275,396	$ 167,296
Gain on real estate dispositions | $		$ 271	$ 10,711	$ 50,282	22,317
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		4		4		17
Depreciation and amortization
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Impairment of real estate | $		$ 17,300	$ 72,700	$ 67,600	$ 92,000
SHOP | 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		3		3		13
NNN | 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		1		1		1
OM&R | 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		0		0		3
Dispositions
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from real estate disposals | $	$ 39,200			$ 261,400
Gain on real estate dispositions | $				$ 50,300
Dispositions | SHOP
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of real estate properties	2	17		17
Dispositions | Outpatient Medical Buildings and Other
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of real estate properties		12		12
Dispositions | NNN
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of real estate properties		23		23
Dispositions | Vacant Outpatient Medical Properties
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of real estate properties		1		1