OTHER ASSETS (Details) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Summary of Other Assets [Abstract]
Leasing costs (principally commissions), net of accumulated amortization	$ 22,439	$ 22,274
Straight-line rent receivable, net of allowance for doubtful accounts	19,793	18,694
Accounts receivable, net of allowance for doubtful accounts	2,015	2,460
Mortgage loans receivable, net of discount	4,122	4,131
Loan costs, net of accumulated amortization	3,442	3,358
Acquired in-place lease intangibles, net of accumulated amortization	2,014	3,046
Goodwill	990	990
Prepaid expenses and other assets	6,784	7,456
Other Assets Total	61,599	62,409
Discount - Mortgage loans receivable	48	56
Accumulated amortization - Acquired in-place lease intangibles	$ 7,475	$ 6,443