SEGMENT DISCLOSURE - Capital Expenditures and Loans (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment disclosure
Total assets	$ 2,022,884,000	$ 2,092,060,000
Lending assets	0	22,062,000
Total capital expenditures	31,844,000	31,342,000	$ 28,879,000
Loan originations	105,201,000	59,467,000	50,971,000
Total capital expenditures and loan originations	137,045,000	90,809,000	79,850,000
Non cash additions to commercial real estate loans for interest	966,000
Office
Segment disclosure
Total assets	1,568,702,000	1,520,339,000
Total capital expenditures	30,563,000	27,686,000	26,157,000
Hotel
Segment disclosure
Total assets	115,955,000	176,735,000
Total capital expenditures	733,000	1,158,000	1,481,000
Multi-family
Segment disclosure
Total assets	170,159,000	171,429,000
Total capital expenditures	548,000	2,498,000	$ 1,241,000
Lending division
Segment disclosure
Lending assets	91,191,000	128,992,000
Non-segment
Segment disclosure
Total assets	$ 76,877,000	$ 94,565,000