SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2017 USD ($) Employee Segment Room Property	Dec. 31, 2016 USD ($)
Accounting Policies [Abstract]
Number of properties acquired	3
Acquisition cost capitalized | $	$ 200
Number of employees | Employee	178
Office, retail, multifamily, and mixed-use operating properties	26
Properties held for development	4
Number of operating segments | Segment	4
Room in mixed-use segment all-suite hotel | Room	369
Restricted cash | $	$ 10,124	$ 9,950