OTHER REAL ESTATE RELATED AND OTHER INVESTMENTS - Narrative (Details) £ in Millions							1 Months Ended		3 Months Ended		9 Months Ended
	Jun. 05, 2025 USD ($)	Dec. 05, 2024 USD ($) facility	Dec. 01, 2024	Aug. 01, 2024 USD ($) facility	Jul. 30, 2024 USD ($)	Jun. 03, 2024 USD ($) facility extension_option	Apr. 30, 2025 USD ($) facility	Feb. 28, 2025 USD ($) facility	Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) property	Sep. 30, 2024 USD ($)	Sep. 22, 2025 GBP (£) property	Jul. 01, 2025 USD ($)	Jun. 01, 2025 USD ($) facility	Jan. 10, 2025 USD ($) facility	Dec. 31, 2024 USD ($)	Dec. 20, 2024	May 01, 2024 USD ($) facility	Feb. 02, 2024 USD ($) facility extension_option	Feb. 01, 2024 USD ($) facility	Jan. 25, 2024 USD ($) extension_option facility	Jan. 01, 2024 USD ($) facility
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, mortgage prepaid loan, outstanding							$ 2,900,000
Payments for earnout on financing receivables							$ 9,000,000
Participating mortgage loans, amount						$ 75,000,000
Repayments of secured debt											$ 0	$ 75,000,000
Loss on extinguishment of debt									$ 390,000	$ 657,000	390,000	657,000
Preferred equity investments						$ 9,000,000					$ 30,000,000	52,000,000
Preferred equity investment, interest rate (as percent)						0.11
Number of Properties | property											146
Proceeds from lease obligation									2,200,000		$ 6,600,000
New Cascade Lease
Financing Receivable, Allowance for Credit Loss [Line Items]
Number of Properties | facility		46
Sale leaseback transaction, lease term			15 years
Other Investments
Financing Receivable, Allowance for Credit Loss [Line Items]
Principal amount									83,782,000		$ 83,782,000						$ 53,782,000
Secured borrowings
Financing Receivable, Allowance for Credit Loss [Line Items]
Repayments of secured debt					$ 75,000,000
Loss on extinguishment of debt					$ 400,000
Multi-service campuses
Financing Receivable, Allowance for Credit Loss [Line Items]
Number of Properties | property											2
SNF
Financing Receivable, Allowance for Credit Loss [Line Items]
Principal amount				$ 260,000,000
Financing receivable, interest rate				8.40%
Number of facilities | facility				37
Lockout period				24 months
Preferred equity investments	$ 30,000,000			$ 43,000,000
Preferred equity investment, interest rate (as percent)	0.12			0.11
Mezzanine Loan
Financing Receivable, Allowance for Credit Loss [Line Items]
Principal amount																				$ 50,000,000		$ 10,200,000
Financing receivable, interest rate																					11.50%
Finance receivable, number of extension options | extension_option																				2		2
Finance receivable, extension option, term																				6 months		6 months
Mezzanine Loan | Secured Overnight Financing Rate (SOFR)
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, interest rate																				8.75%		8.75%
Subservicing fee percentage																				0.75%		0.75%
Mezzanine Loan | Secured Overnight Financing Rate (SOFR) Floor
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, interest rate																				6.00%		6.00%
Mezzanine Loan | SNF
Financing Receivable, Allowance for Credit Loss [Line Items]
Principal amount																				$ 35,000,000	$ 7,400,000	$ 9,800,000
Number of facilities | facility																				15	1	10
Period of unpaid interest payments due upon prepayment																				18 months	18 months	24 months
Mezzanine Loan | SNF | Minimum
Financing Receivable, Allowance for Credit Loss [Line Items]
Early termination fee																				1.00%		1.00%
Mezzanine Loan | SNF | Maximum
Financing Receivable, Allowance for Credit Loss [Line Items]
Early termination fee																				2.00%		2.00%
Mezzanine loans receivable | Multi-service campuses
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, interest rate																		13.00%
Mortgage Loan
Financing Receivable, Allowance for Credit Loss [Line Items]
Number of facilities | facility							1	1
Finance receivable, number of extension options | extension_option						2
Finance receivable, extension option, term						6 months									1 year
Mortgage Loan | Secured Overnight Financing Rate (SOFR) Floor
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, interest rate						5.15%
Subservicing fee percentage						0.25%
Mortgage Loan | Regional Healthcare Facility
Financing Receivable, Allowance for Credit Loss [Line Items]
Principal amount						$ 165,000,000	$ 165,000,000
Mortgage Loan | SNF
Financing Receivable, Allowance for Credit Loss [Line Items]
Principal amount				$ 260,000,000		$ 165,000,000													$ 26,700,000
Financing receivable, interest rate																			9.10%
Number of facilities | facility						8		1							1				2
Finance receivable, extension option, term																			1 year
Mortgage Loan | SNF | Secured Overnight Financing Rate (SOFR)
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, interest rate						4.25%
Mortgage secured loan receivable
Financing Receivable, Allowance for Credit Loss [Line Items]
Number of facilities | facility																							1
Mortgage secured loan receivable | ALF
Financing Receivable, Allowance for Credit Loss [Line Items]
Principal amount																							$ 1,000,000
Financing receivable, interest rate																							9.00%
Financing receivable | Other Investments
Financing Receivable, Allowance for Credit Loss [Line Items]
Principal amount		$ 95,700,000							95,723,000		$ 95,723,000						$ 95,723,000
Other loans receivable
Financing Receivable, Allowance for Credit Loss [Line Items]
Principal amount									$ 28,291,000		28,291,000
Provision for loan losses, net											$ 0	$ 0
SNF
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing receivable, mortgage prepaid loan amount								$ 4,400,000
SNF | Mezzanine Loan
Financing Receivable, Allowance for Credit Loss [Line Items]
Number of property secured by pledge | facility																1
SNF | Mezzanine Loan | MARYLAND
Financing Receivable, Allowance for Credit Loss [Line Items]
Principal amount																$ 6,400,000
SNF | Mortgage Loan
Financing Receivable, Allowance for Credit Loss [Line Items]
Principal amount														$ 5,000,000	$ 6,100,000
Financing receivable, interest rate															8.50%
SNF | Mortgage Loan | Minimum
Financing Receivable, Allowance for Credit Loss [Line Items]
Exit fee (in percent)															0.00%
SNF | Mortgage Loan | Maximum
Financing Receivable, Allowance for Credit Loss [Line Items]
Exit fee (in percent)															2.00%
SNF | Mortgage Loan | MARYLAND
Financing Receivable, Allowance for Credit Loss [Line Items]
Principal amount							$ 2,000,000
U.K Care Homes | Mortgage Loan
Financing Receivable, Allowance for Credit Loss [Line Items]
Principal amount | £													£ 15.5
Financing receivable, interest rate													8.50%
Number of properties secured | property													1