SEGMENT DISCLOSURE - Assets and Capital Expenditures and Loan Originations (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Segment disclosure
Total assets	$ 2,165,830		$ 2,022,884
Total capital expenditures	6,981	$ 6,934
Loan originations	8,404	33,777
Total capital expenditures and loan originations	15,385	40,711
Reportable segments | Office
Segment disclosure
Total assets	1,453,857		1,568,702
Total capital expenditures	6,805	6,653
Reportable segments | Hotel
Segment disclosure
Total assets	110,816		115,955
Total capital expenditures	46	150
Reportable segments | Multi-family
Segment disclosure
Total assets	166,707		170,159
Total capital expenditures	130	$ 131
Reportable segments | Lending
Segment disclosure
Total assets	89,904		91,191
Non-segment
Segment disclosure
Total assets	$ 344,546		$ 76,877