SEGMENT DISCLOSURE - Operating Income (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) property	Mar. 31, 2019 USD ($) property
Segment disclosure
Number of types of commercial real estate properties | property	2	2
Revenues	$ 25,535	$ 47,277
Expenses:
Interest expense	3,167	4,045
General and administrative	1,734	1,788
EXPENSES	26,813	132,917
Segment net operating income	(1,278)	291,941
Reportable segments
Expenses:
Segment net operating income	11,535	24,815
Reportable segments | Office
Segment disclosure
Revenues	14,897	33,445
Expenses:
Operating	6,046	13,559
General and administrative	98	154
EXPENSES	6,144	13,713
Segment net operating income	8,753	19,732
Reportable segments | Hotel
Segment disclosure
Revenues	8,253	10,589
Expenses:
Operating	6,469	6,694
General and administrative	13	14
EXPENSES	6,482	6,708
Segment net operating income	1,771	3,881
Reportable segments | Lending
Segment disclosure
Revenues	2,384	2,924
Expenses:
Interest expense	291	582
Fees to related party	682	637
General and administrative	400	503
EXPENSES	1,373	1,722
Segment net operating income	$ 1,011	$ 1,202