FAIR VALUE DISCLOSURES - Face Values, Carrying Amounts and Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Financial assets:
Loans receivable	$ 366,200	$ 370,364
Preferred equity investments	52,551	50,902
Senior Notes
Financial liabilities:
Financial liabilities	1,750,000	1,750,000
Secured Indebtedness
Financial liabilities:
Financial liabilities	49,633	50,123
Carrying Amount
Financial assets:
Loans receivable	356,365	360,325
Preferred equity investments	52,714	51,071
Carrying Amount | Senior Notes
Financial liabilities:
Financial liabilities	1,734,644	1,734,431
Carrying Amount | Secured Indebtedness
Financial liabilities:
Financial liabilities	48,754	49,232
Fair Value
Financial assets:
Loans receivable	370,048	370,188
Preferred equity investments	54,156	51,995
Fair Value | Senior Notes
Financial liabilities:
Financial liabilities	1,436,036	1,463,041
Fair Value | Secured Indebtedness
Financial liabilities:
Financial liabilities	$ 37,583	$ 38,149