IMPAIRMENT OF REAL ESTATE INVESTMENTS, ASSETS HELD FOR SALE, NET AND ASSET SALES - Schedule of Company's Dispositions (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($) facility	Sep. 30, 2022 USD ($) facility	Sep. 30, 2023 USD ($) facility	Sep. 30, 2022 USD ($) facility	Jun. 30, 2023 USD ($) facility	Dec. 31, 2022 facility
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net sales proceeds			$ 14,464	$ 34,115
Net (loss) gain on sale	$ 0	$ (2,287)	1,958	$ (2,101)
Principal amount	$ 194,434		$ 194,434
Number of facilities | facility					1
Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of facilities | facility	0	7	4	8
Net sales proceeds	$ 0	$ 45,157	$ 16,464	$ 46,116
Net carrying value	0	47,444	14,506	48,217
Net (loss) gain on sale	$ 0	$ (2,287)	$ 1,958	$ (2,101)
Disposed of by Sale | Assisted Living Facilities
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of facilities | facility					1
Disposed of by Sale | Skilled nursing(4)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of facilities | facility		6		6
Disposed of by Sale | Multi-service campuses
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of facilities | facility		1		1
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 facilities | facility	15		15			5
Disposal Group, Held-for-sale, Not Discontinued Operations | Assisted Living Facilities
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Principal amount					$ 2,000
Disposal Group, Held-for-sale, Not Discontinued Operations | Skilled nursing(4)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Principal amount		$ 12,000		$ 12,000