BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Revenue (Details) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Accounting Policies [Abstract]
Fixed lease income - operating leases	$ 63,265,000	$ 56,673,000
Variable lease income - operating leases	3,500,000	2,523,000
Revenue from contracts with customers	1,132,000	1,118,000
Total revenue	67,897,000	60,314,000
Gain on sale of real estate and other investments	$ 60,159,000	$ 0