OTHER ASSETS (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Other Assets Components [Abstract]
Leasing costs (principally commissions)	$ 60,415	$ 59,043
Accumulated amortization of leasing costs	(23,835)	(23,455)
Leasing costs (principally commissions), net of accumulated amortization	36,580	35,588
Straight-line rents receivable	27,028	26,482
Allowance for doubtful accounts on straight-line rents receivable	(131)	(167)
Straight-line rents receivable, net of allowance for doubtful accounts	26,897	26,315
Accounts receivable	3,782	5,615
Allowance for doubtful accounts on accounts receivable	(387)	(394)
Accounts receivable, net of allowance for doubtful accounts	3,395	5,221
Acquired in-place lease intangibles	18,296	19,061
Accumulated amortization of acquired in-place lease intangibles	(8,551)	(8,205)
Acquired in-place lease intangibles, net of accumulated amortization	9,745	10,856
Acquired above market lease intangibles	1,257	1,337
Accumulated amortization of acquired above market lease intangibles	(646)	(684)
Acquired above market lease intangibles, net of accumulated amortization	611	653
Mortgage loans receivable	4,845	4,875
Interest rate swap assets	270	400
Goodwill	990	990
Prepaid expenses and other assets	6,221	6,960
Other Assets Total	$ 89,554	$ 91,858