SEGMENT DISCLOSURE - Capital Expenditures and Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment disclosure
Total assets	$ 1,336,388	$ 2,022,884
Total capital expenditures	26,078	31,844	$ 31,342
Loan originations	76,316	105,201	59,467
Total capital expenditures and loan originations	102,394	137,045	90,809
Non cash additions to commercial real estate loans for interest		966
Office
Segment disclosure
Total assets	997,808	1,568,702
Total capital expenditures	24,907	30,563	27,686
Hotel
Segment disclosure
Total assets	107,790	115,955
Total capital expenditures	478	733	1,158
Lending division
Segment disclosure
Total assets	92,919	91,191
Multi-family
Segment disclosure
Total assets	815	170,159
Total capital expenditures	693	548	$ 2,498
Non-segment
Segment disclosure
Total assets	$ 137,056	$ 76,877