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	$ 30,569	$ 22,472
Tenant Origination and Absorption Costs, Accumulated Amortization	(10,223)	(5,255)
Tenant Origination and Absorption Costs, Net Amount	20,346	17,217
Above-Market Lease Assets, Cost	3,714	3,714
Above-Market Lease Assets, Accumulated Amortization	(741)	(337)
Above-Market Lease Assets, Net Amount	2,973	3,377
Below-Market Lease Liabilities, Cost	(4,958)	(4,406)
Below-Market Lease Liabilities, Accumulated Amortization	1,778	878
Below-Market Lease Liabilities, Net Amount	(3,180)	(3,528)
Tenant Origination And Absorption Costs, Amortization	(7,036)	(7,895)	$ (10,265)
Above-Market Lease Assets, Amortization	(404)	(361)	(283)
Below-Market Lease Liabilities, Amortization	$ 1,495	$ 1,513	$ 2,858