INTANGIBLE LEASE ASSETS AND LIABILITIES - Components (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Intangible Assets And Liabilities [Line Items]
Sub-total Intangible Lease Assets	$ 73,164	$ 68,447
Accumulated Amortization	(19,949)	(18,271)
Total	53,215	50,176
Intangible Lease Liabilities
Value of Below Market In-Place Leases	(36,655)	(36,817)
Sub-total Intangible Lease Liabilities-Net	(36,655)	(36,817)
Accumulated Amortization	13,259	12,654
Total	(23,396)	(24,163)
Total Intangible Assets and Liabilities-Net	29,819	26,013
Value of In-Place Leases
Intangible Assets And Liabilities [Line Items]
Sub-total Intangible Lease Assets	47,271	44,558
Value of Above Market In-Place Leases
Intangible Assets And Liabilities [Line Items]
Sub-total Intangible Lease Assets	11,580	10,604
Value of Intangible Leasing Costs
Intangible Assets And Liabilities [Line Items]
Sub-total Intangible Lease Assets	$ 14,313	$ 13,285