FAIR VALUE DISCLOSURES - Face Values, Carrying Amounts and Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Financial assets:
Loans receivable	$ 371,133	$ 370,364
Preferred equity investments	56,760	50,902
Senior Notes
Financial liabilities:
Financial liabilities, face value	1,750,000	1,750,000
Secured Indebtedness
Financial liabilities:
Financial liabilities, face value	48,643	50,123
Carrying Amount
Financial assets:
Loans receivable	361,026	360,325
Preferred equity investments	56,921	51,071
Carrying Amount | Senior Notes
Financial liabilities:
Financial liabilities, carrying amount and fair value	1,735,055	1,734,431
Carrying Amount | Secured Indebtedness
Financial liabilities:
Financial liabilities, carrying amount and fair value	47,789	49,232
Fair Value
Financial assets:
Loans receivable	368,437	370,188
Preferred equity investments	58,697	51,995
Fair Value | Senior Notes
Financial liabilities:
Financial liabilities, carrying amount and fair value	1,468,812	1,463,041
Fair Value | Secured Indebtedness
Financial liabilities:
Financial liabilities, carrying amount and fair value	$ 34,164	$ 38,149