ACQUIRED IN-PLACE LEASES AND ABOVE/BELOW MARKET LEASES Acquired Lease Intangibles and Leasing Costs Included in Other Assets and Other Liabilities and Deferred Credits (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Acquired Finite-Lived Intangible Assets [Line Items]
Leases, gross	$ 114	$ 121
Accumulated amortization	(1,277)	(1,213)
Below market leases	56,666	56,677
Accumulated accretion	(35,993)	(35,219)
Acquired lease intangible liabilities, net	20,673	21,458
Leases
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired lease intangible assets, net	25,237	26,328
In-place leases
Acquired Finite-Lived Intangible Assets [Line Items]
Leases, gross	60,447	60,965
Accumulated amortization	(35,324)	(34,758)
Above market leases
Acquired Finite-Lived Intangible Assets [Line Items]
Leases, gross	4,665	5,389
Accumulated amortization	$ (4,551)	$ (5,268)