RELATED PARTY TRANSACTIONS AND FEES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Fees:
Advisory	$ 9,995	$ 9,490	$ 8,368
Net income	250	257	187
Other Expense:
Cost reimbursements	1,954
Pillar Income Asset Management, Inc [Member]
Fees:
Advisory	9,995	9,490	8,368
Mortgage brokerage and equity refinancing	1,551	775	1,524
Net income	250	257	187
Property acquisition			921
Total fees	11,796	10,522	11,000
Other Expense:
Cost reimbursements	2,895	3,228	2,925
Interest paid (received)	(4,859)	(4,216)	(3,352)
Total other expense	(1,964)	(988)	(427)
Revenue:
Rental	783	708	726
Regis Realty Prime, LLC [Member]
Fees:
Property acquisition	9,819	10,776	1,932
Property management, construction management and leasing commissions	963	888	682
Real estate brokerage	1,369	787	1,105
Total fees	$ 12,151	$ 12,451	$ 3,719