OTHER LIABILITIES (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Other Liabilities, Unclassified [Abstract]
Security deposits	$ 21,697	$ 20,351
Prepaid rent and other deferred income	12,130	13,855
Operating lease liabilities - ground leases	11,410	12,048
Operating lease liabilities - office leases	2,287	2,141
Acquired Below Market Lease Intangibles	8,637	8,616
Accumulated Amortization of Acquired Below Market Lease Intangibles	(5,738)	(4,494)
Acquired Below Market Lease Intangibles, Net of Accumulated Amortization	2,899	4,122
Interest rate swap liabilities	13,445	678
Prepaid tenant improvement reimbursements	26	56
Other liabilities	5,650	15,872
Total Other Liabilities	$ 69,544	$ 69,123