RELATED PARTY TRANSACTIONS AND FEES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Pillar Income Asset Management, Inc [Member]
Fees:
Advisory	$ 11,475	$ 11,082	$ 10,918
Mortgage brokerage and equity refinancing	852	1,712	775
Net income	631	250	257
Total fees	12,958	13,044	11,950
Other Expense:
Cost reimbursements	4,720	3,240	3,826
Interest paid (received)	(3,370)	(1,195)	(1,444)
Total other expense	1,350	2,045	2,382
Revenue:
Rental	1,178	783	708
Regis Realty Prime, LLC [Member]
Fees:
Property acquisition	32,008	9,128	10,775
Property management, construction management and leasing commissions	540	963	888
Real estate brokerage	2,068	1,369	787
Total fees	$ 34,616	$ 11,460	$ 12,450