SEGMENT DISCLOSURE (Details) $ in Thousands	3 Months Ended								10 Months Ended	12 Months Ended
	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2016 USD ($) property	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Segment disclosure
Number of types of commercial real estate properties | property										3
Revenues	$ 64,622	$ 64,332	$ 68,360	$ 68,617	$ 70,002	$ 68,460	$ 69,237	$ 69,249		$ 265,931	$ 276,948	$ 262,827
Interest expense										34,385	23,630	20,250
Property expenses:
General and administrative										7,961	9,402	11,042
EXPENSES										273,239	273,122	253,998
Reportable segments
Property expenses:
Total segment net operating income										133,406	136,294	129,197
Reportable segments | Office
Segment disclosure
Revenues										187,435	188,270	179,338
Property expenses:
Operating										81,217	80,014	73,666
General and administrative										1,234	771	981
EXPENSES										82,451	80,785	74,647
Total segment net operating income										104,984	107,485	104,691
Reportable segments | Hotel
Segment disclosure
Revenues										48,379	61,436	56,096
Property expenses:
Operating										32,177	41,585	39,544
General and administrative										282	389	150
EXPENSES										32,459	41,974	39,694
Total segment net operating income										15,920	19,462	16,402
Reportable segments | Multi-family
Segment disclosure
Revenues										20,303	18,721	20,719
Property expenses:
Operating										11,309	11,579	13,664
General and administrative										1,048	589	738
EXPENSES										12,357	12,168	14,402
Total segment net operating income										7,946	6,553	6,317
Reportable segments | Lending division
Segment disclosure
Revenues										9,814	8,521	6,674
Interest expense										537	845	1,177
Fees to related party										3,555	3,850	0
Property expenses:
General and administrative										1,166	1,032	3,710
EXPENSES										5,258	5,727	4,887
Total segment net operating income										$ 4,556	$ 2,794	$ 1,787
Salaries and related benefits included in general and administrative expense									$ 2,866