OTHER ASSETS (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Other Assets Components [Abstract]
Leasing costs (principally commissions)	$ 57,711	$ 56,171
Accumulated amortization of leasing costs	(23,375)	(22,951)
Leasing costs (principally commissions), net of accumulated amortization	34,336	33,220
Straight-line rents receivable	25,795	25,013
Allowance for doubtful accounts on straight-line rents receivable	(292)	(102)
Straight-line rents receivable, net of allowance for doubtful accounts	25,503	24,911
Accounts receivable	3,771	4,459
Allowance for doubtful accounts on accounts receivable	(349)	(379)
Accounts receivable, net of allowance for doubtful accounts	3,422	4,080
Acquired in-place lease intangibles	17,920	20,118
Accumulated amortization of acquired in-place lease intangibles	(9,276)	(8,345)
Acquired in-place lease intangibles, net of accumulated amortization	8,644	11,773
Acquired above market lease intangibles	1,444	1,575
Accumulated amortization of acquired above market lease intangibles	(740)	(699)
Acquired above market lease intangibles, net of accumulated amortization	704	876
Loan costs	9,119	8,166
Accumulated amortization of loan costs	(4,655)	(4,454)
Loan costs, net of accumulated amortization	4,464	3,712
Mortgage loans receivable	4,904	4,991
Interest rate swap assets	0	812
Escrow deposits for 1031 exchange	0	698
Goodwill	990	990
Prepaid expenses and other assets	5,642	7,446
Other Assets Total	$ 88,609	$ 93,509