BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Loans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Jan. 01, 2023	Dec. 31, 2022
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Unamortized retained loan discounts	$ 8,300	$ 8,400
Loan receivable, nonaccrual, past due period (more than)	60 days
Cumulative-effective adjustment	$ 372,079	376,769	$ 378,682		$ 362,033
Allowance for credit losses	1,644	1,680	1,940		1,106
Distributions in Excess of Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative-effective adjustment	$ (936,151)	$ (921,925)	$ (853,108)		(837,846)
Cumulative-effect adjustment upon adoption of ASU 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative-effective adjustment					(619)
Allowance for credit losses					783
Cumulative-effect adjustment upon adoption of ASU 2016-13 | 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