SEGMENT DISCLOSURE - Operating Income (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($) property	Sep. 30, 2015 USD ($)
Segment disclosure
Number of types of commercial real estate properties | property			3
Revenues	$ 64,332	$ 68,460	$ 201,309	$ 206,946
Expenses:
Interest expense	10,276	5,781	24,386	17,191
General and administrative	2,226	2,029	6,299	7,250
EXPENSES	70,498	67,680	206,070	203,877
Reportable segments
Expenses:
Total segment net operating income	30,279	33,005	99,892	102,312
Reportable segments | Office
Segment disclosure
Revenues	47,584	46,427	139,403	140,126
Expenses:
Operating	22,351	19,832	60,768	59,283
General and administrative	344	226	789	652
EXPENSES	22,695	20,058	61,557	59,935
Total segment net operating income	24,889	26,369	77,846	80,191
Reportable segments | Hotel
Segment disclosure
Revenues	9,139	15,350	38,918	46,891
Expenses:
Operating	6,479	10,623	25,865	31,287
General and administrative	229	205	622	284
EXPENSES	6,708	10,828	26,487	31,571
Total segment net operating income	2,431	4,522	12,431	15,320
Reportable segments | Multi-family
Segment disclosure
Revenues	5,068	4,618	15,298	13,536
Expenses:
Operating	2,893	2,906	8,667	8,485
General and administrative	485	145	840	318
EXPENSES	3,378	3,051	9,507	8,803
Total segment net operating income	1,690	1,567	5,791	4,733
Reportable segments | Lending division
Segment disclosure
Revenues	2,541	2,065	7,690	6,393
Expenses:
Interest expense	124	230	306	651
Fees to related party	865	1,109	2,679	2,821
General and administrative	283	179	881	853
EXPENSES	1,272	1,518	3,866	4,325
Total segment net operating income	$ 1,269	$ 547	$ 3,824	$ 2,068