SEGMENT DISCLOSURE - Operating Income (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($) property	Jun. 30, 2018 USD ($) property	Jun. 30, 2019 USD ($) property	Jun. 30, 2018 USD ($) property
Segment disclosure
Number of types of commercial real estate properties | property	2	2	2	2
Revenues	$ 36,856	$ 51,544	$ 84,133	$ 99,838
Expenses:
Interest expense	2,550	6,811	6,595	13,444
General and administrative	1,621	1,915	3,409	5,291
EXPENSES	39,229	49,303	172,146	96,587
Segment net operating income	52,848	2,241	344,789	3,251
Reportable segments
Expenses:
Segment net operating income	18,012	29,352	42,827	57,577
Reportable segments | Office
Segment disclosure
Revenues	22,050	37,889	55,495	72,701
Expenses:
Operating	8,913	13,928	22,472	25,311
General and administrative	202	98	356	979
EXPENSES	9,115	14,026	22,828	26,290
Segment net operating income	12,935	23,863	32,667	46,411
Reportable segments | Hotel
Segment disclosure
Revenues	10,330	10,947	20,919	21,438
Expenses:
Operating	6,745	6,837	13,439	13,370
General and administrative	63	0	77	18
EXPENSES	6,808	6,837	13,516	13,388
Segment net operating income	3,522	4,110	7,403	8,050
Reportable segments | Lending
Segment disclosure
Revenues	2,977	2,708	5,901	5,699
Expenses:
Interest expense	536	300	1,118	484
Fees to related party	551	639	1,188	1,240
General and administrative	335	390	838	859
EXPENSES	1,422	1,329	3,144	2,583
Segment net operating income	$ 1,555	$ 1,379	$ 2,757	$ 3,116