BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Reconciliation of Hotel Revenue (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Hotel income									$ 11,882	$ 35,633	$ 35,672
Rental and other property income									54,823	88,331	147,095
Interest and other income									10,503	16,025	14,703
Total Revenues	$ 17,829	$ 17,334	$ 16,510	$ 25,535	$ 26,641	$ 29,215	$ 36,856	$ 47,277	77,208	139,989	197,470
Hotel
Disaggregation of Revenue [Line Items]
Hotel income									11,882	35,633	35,672
Rental and other property income									1,353	2,947	2,922
Interest and other income									79	168	195
Total Revenues									$ 13,314	$ 38,748	$ 38,789