INTANGIBLE ASSETS AND LIABILITIES - Remaining Unamortized Balance for Outstanding Intangible Assets and Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets
Lease intangible assets, net	$ 131,097	$ 167,119
Lease Intangible Assets
Finite-Lived Intangible Assets
2019	21,367
2020	17,822
2021	15,363
2022	14,427
2023	11,317
Thereafter	50,801
Lease intangible assets, net	$ 131,097
Lease Intangible Assets | Weighted Average
Finite-Lived Intangible Assets
Weighted-average remaining amortization period	8 years 11 months
Lease Intangible Liabilities
Finite-Lived Intangible Assets
2019	$ 13,779
2020	12,221
2021	8,012
2022	7,269
2023	7,269
Thereafter	35,176
Lease intangible assets, net	$ 83,726
Lease Intangible Liabilities | Weighted Average
Finite-Lived Intangible Assets
Weighted-average remaining amortization period	9 years 3 months