OTHER REAL ESTATE RELATED AND OTHER INVESTMENTS - Other Real Estate Related Investments, at Fair Value (Details) $ in Thousands	1 Months Ended			9 Months Ended
	Sep. 30, 2023 USD ($) facility extension_option	Jul. 31, 2023 USD ($) facility extension_option	Jun. 30, 2023 USD ($) facility	Sep. 30, 2023 USD ($) facility	Dec. 31, 2022 USD ($) facility
Real Estate Properties [Line Items]
Principal amount	$ 194,434			$ 194,434
Fair Value	181,175			181,175	$ 156,368
Number of facilities | facility			1
Senior mortgage secured loan receivable
Real Estate Properties [Line Items]
Principal amount	75,000			75,000
Fair Value	$ 68,472			$ 68,472	$ 72,543
Weighted Average Contractual Interest Rate	8.40%			8.40%
Senior mortgage secured loan receivable | Skilled Nursing and Campus Facilities
Real Estate Properties [Line Items]
Facility Count and Type | facility	18			18	18
Mortgage secured loan receivable
Real Estate Properties [Line Items]
Principal amount	$ 22,250			$ 22,250
Fair Value	$ 21,210			$ 21,210	$ 21,345
Weighted Average Contractual Interest Rate	10.70%			10.70%
Mortgage secured loan receivable | Skilled Nursing Facility
Real Estate Properties [Line Items]
Facility Count and Type | facility	5			5	5
Mortgage secured loan receivable | SOFR
Real Estate Properties [Line Items]
Basis spread on variable rate (percent)				5.32%
Mortgage secured loan receivable
Real Estate Properties [Line Items]
Principal amount	$ 24,900			$ 24,900
Fair Value	$ 22,716			$ 22,716	$ 23,796
Weighted Average Contractual Interest Rate	9.00%			9.00%
Mortgage secured loan receivable | Skilled Nursing Facility
Real Estate Properties [Line Items]
Facility Count and Type | facility	4			4	4
Mortgage secured loan receivable
Real Estate Properties [Line Items]
Principal amount	$ 2,000			$ 2,000
Fair Value	$ 2,000			$ 2,000	$ 0
Weighted Average Contractual Interest Rate	9.00%			9.00%
Extension option, term (year)			1 year
Mortgage secured loan receivable | Assisted Living Facilities
Real Estate Properties [Line Items]
Facility Count and Type | facility	1			1	1
Principal amount			$ 2,000
Mortgage secured loan receivable
Real Estate Properties [Line Items]
Principal amount	$ 25,993			$ 25,993
Fair Value	$ 26,186			$ 26,186	$ 0
Weighted Average Contractual Interest Rate	9.00%			9.00%
Mortgage secured loan receivable | Skilled Nursing and Campus Facilities
Real Estate Properties [Line Items]
Facility Count and Type | facility	2			2	2
Mortgage secured loan receivable | Skilled Nursing Facility
Real Estate Properties [Line Items]
Principal amount			$ 26,000
Number of facilities | facility			1
Mortgage secured loan receivable | Skilled Nursing Facility | Minimum
Real Estate Properties [Line Items]
Early termination fee			0.00%
Mortgage secured loan receivable | Skilled Nursing Facility | Maximum
Real Estate Properties [Line Items]
Early termination fee			3.00%
Mortgage secured loan receivable | Assisted and Independent Living Properties
Real Estate Properties [Line Items]
Number of facilities | facility			1
Mortgage secured loan receivable
Real Estate Properties [Line Items]
Principal amount	$ 15,727			$ 15,727
Fair Value	$ 15,397			$ 15,397	$ 0
Weighted Average Contractual Interest Rate	9.00%			9.00%
Extension option, term (year)		5 years
Mortgage secured loan receivable | Skilled Nursing Facility
Real Estate Properties [Line Items]
Facility Count and Type | facility	2			2	2
Principal amount		$ 15,700
Number of facilities | facility		2
Number of extension option | extension_option		1
Mortgage secured loan receivable | Skilled Nursing Facility | Minimum
Real Estate Properties [Line Items]
Early termination fee		2.00%
Mortgage secured loan receivable | Skilled Nursing Facility | Maximum
Real Estate Properties [Line Items]
Early termination fee		3.00%
Mortgage secured loan receivable
Real Estate Properties [Line Items]
Principal amount	$ 3,564			$ 3,564
Fair Value	$ 3,390			$ 3,390	$ 0
Weighted Average Contractual Interest Rate	12.00%			12.00%
Mortgage secured loan receivable | Skilled Nursing Facility
Real Estate Properties [Line Items]
Facility Count and Type | facility	3			3	3
Principal amount	$ 3,600			$ 3,600
Number of facilities | facility	3			3
Extension option, term (year)	6 months
Number of extension option | extension_option	2
Mortgage secured loan receivable | Skilled Nursing Facility | Minimum
Real Estate Properties [Line Items]
Early termination fee	0.00%			0.00%
Mortgage secured loan receivable | Skilled Nursing Facility | Maximum
Real Estate Properties [Line Items]
Early termination fee	2.00%			2.00%
Mortgage secured loan receivable | Multi-Tranche Facilities
Real Estate Properties [Line Items]
Principal amount	$ 3,600			$ 3,600
Mezzanine loans receivable
Real Estate Properties [Line Items]
Principal amount	0			0
Fair Value	$ 0			$ 0	$ 14,672
Weighted Average Contractual Interest Rate	0.00%			0.00%
Mezzanine loans receivable | Skilled Nursing Facility
Real Estate Properties [Line Items]
Facility Count and Type | facility	9			9	9
Mezzanine loan receivable
Real Estate Properties [Line Items]
Principal amount	$ 25,000			$ 25,000
Fair Value	$ 21,804			$ 21,804	$ 24,012
Weighted Average Contractual Interest Rate	11.00%			11.00%
Mezzanine loan receivable | Skilled Nursing and Campus Facilities
Real Estate Properties [Line Items]
Facility Count and Type | facility	18			18	18
Other
Real Estate Properties [Line Items]
Principal amount	$ 14,053			$ 14,053
Fair Value	$ 14,090			$ 14,090	$ 9,600
Weighted Average Contractual Interest Rate	8.70%			8.70%