IDENTIFIED INTANGIBLE ASSETS AND LIABILITIES - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Identified intangible assets, net of accumulated amortization	$ 54,870		$ 54,870		$ 48,121
Identified intangible liabilities, net of accumulated amortization	125,766		125,766		$ 128,830
Amortization of acquired below-market leases, net of above-market leases	2,300	$ 2,100	6,800	$ 13,900
Amortization expense of intangible assets	$ 2,100	$ 1,700	$ 6,300	$ 5,700