TENANT ORIGINATION AND ABSORPTION COSTS, ABOVE-MARKET LEASE ASSETS AND BELOW-MARKET LEASE LIABILITIES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Tenant Origination and Absorption Costs, Above-Market Lease Assets and Below-Market Lease Liabilities [Abstract]
Tenant Origination And Absorption Costs, Cost	$ 15,422	$ 17,183
Tenant Origination and Absorption Costs, Accumulated Amortization	(7,954)	(6,163)
Tenant Origination and Absorption Costs, Net Amount	7,468	11,020
Above-Market Lease Assets, Cost	72	99
Above-Market Lease Assets, Accumulated Amortization	(28)	(34)
Above-Market Lease Assets, Net Amount	44	65
Below-Market Lease Liabilities, Cost	(10,802)	(11,526)
Below-Market Lease Liabilities, Accumulated Amortization	6,125	4,178
Below-Market Lease Liabilities, Net Amount	(4,677)	(7,348)
Tenant Origination And Absorption Costs, Amortization	(3,492)	(4,513)	$ (3,892)
Above-Market Lease Assets, Amortization	(17)	(18)	(10)
Below-Market Lease Liabilities, Amortization	$ 2,671	$ 3,435	$ 2,038