LOANS RECEIVABLE AND OTHER INVESTMENTS - Narrative (Details)	12 Months Ended
	Dec. 31, 2021 USD ($) investment loan	Dec. 31, 2020 USD ($) loan	Oct. 15, 2021 USD ($) property
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal balance	$ 352,159,000	$ 65,320,000
Rate of return (percent)	7.60%
Book value	$ 342,031,000	58,899,000
Increase (decrease) in the allowance for loan losses	3,900,000	1,900,000
Allowance for loan losses	6,344,000	2,458,000
Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal balance	$ 309,000,000
Rate of return (percent)	7.70%
Mortgage | RCA Mortgage Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal balance			$ 290,000,000
Number of properties to secure loan | property			6
Rate of return (percent)			7.50%
Additional funding commitment available upon achievement of performance metrics			$ 35,000,000
Number of properties in lease-up related to performance metrics | property			2
Future funding on investment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Future funding commitment	$ 28,000,000
Number of preferred equity investments for funding commitment | investment	2
Number of loan receivable investments for funding commitment | investment	1
Receivables with deteriorated credit quality
Accounts, Notes, Loans and Financing Receivable [Line Items]
Principal balance	$ 1,800,000	$ 2,100,000
Number of loans receivable considered to have deteriorated credit quality | loan	4	4
Book value	$ 200,000	$ 500,000
Nonaccrual status
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses		$ 2,500,000
Number of loans receivable on nonaccrual status | loan	3	2
Book value of loans receivable on nonaccrual status	$ 0	$ 0