BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenue Recognition (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Lease incentives	$ 3,976,000	$ 12,958,000
Lease incentives, accumulated amortization	2,029,000	6,188,000
Percentage rent	40,000
Percentage rent		65,000	$ 304,000
Fixed lease payments	80,205,000	136,145,000	162,479,000
Variable lease payments	8,126,000	10,950,000	13,055,000
Rental and other property income	88,331,000	147,095,000	175,534,000
Hotel revenues	35,633,000	35,672,000	35,576,000
Tenant recoveries outside of lease agreements	205,000	399,000	6,822,000
Performance obligations	0
Other Lease and Other Property Revenue
Disaggregation of Revenue [Line Items]
Parking percentage rent	160,000	1,509,000	1,881,000
Revenue from Contract with Customer
Disaggregation of Revenue [Line Items]
Parking percentage rent	0	0	733,000
Rental and other property income
Disaggregation of Revenue [Line Items]
Hotel revenues	2,947,000	2,922,000	2,877,000
Interest and other income
Disaggregation of Revenue [Line Items]
Hotel revenues	168,000	195,000	132,000
Hotel revenues
Disaggregation of Revenue [Line Items]
Hotel revenues	$ 38,748,000	$ 38,789,000	$ 38,585,000