BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Loans Receivable (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Jan. 01, 2023	Dec. 31, 2022	Dec. 31, 2021
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Unamortized retained loan discounts	$ 8,400					$ 9,000
Loan receivable, nonaccrual, past due period (more than)	60 days
Cumulative-effective adjustment	$ (376,769)					(362,033)	$ (373,549)
Loan loss reserves	1,680	$ 1,704	$ 1,713	$ 1,940		1,106
Distributions in Excess of Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative-effective adjustment	$ 921,925					837,846	$ 804,227
Cumulative-effect adjustment upon adoption of ASU 2016-13 (Note 2)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative-effective adjustment						619
Loan loss reserves						783
Cumulative-effect adjustment upon adoption of ASU 2016-13 (Note 2) | Distributions in Excess of Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative-effective adjustment					$ 619	$ 619
CECL reserve transition gross					783
CECL reserve transition, deferred tax asset					$ 164