IDENTIFIED INTANGIBLE ASSETS AND LIABILITIES - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Identified intangible assets, net of accumulated amortization	$ 72,841		$ 72,841		$ 87,249
Identified intangible liabilities, net of accumulated amortization	148,715		148,715		$ 180,959
Amortization of acquired below-market leases, net of above-market leases	19,300	$ 2,700	29,800	$ 6,800
Amortization expense of intangible assets	2,700	2,900	11,200	6,000
Amortization of below-market Lease	$ 200	$ 200	$ 700	$ 700