Condensed Consolidated Statements Of Income And Comprehensive Income (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Revenues:
Rentals, net	$ 135,521	$ 134,320	$ 266,894	$ 267,399
Other	5,704	3,471	8,426	6,484
Total	141,225	137,791	275,320	273,883
Expenses:
Depreciation and amortization	39,609	37,685	78,040	73,542
Operating	26,839	25,581	51,122	51,373
Real estate taxes, net	16,327	16,218	33,072	32,973
Impairment loss	18,892	15,825	19,662	16,061
General and administrative	6,612	6,069	13,168	12,660
Total	108,279	101,378	195,064	186,609
Operating Income	32,946	36,413	80,256	87,274
Interest Expense, net	(37,324)	(37,280)	(74,170)	(74,719)
Interest and Other Income, net	1,423	972	3,478	3,835
Equity in Earnings of Real Estate Joint Ventures and Partnerships, net	3,579	2,630	6,976	5,866
Loss on Redemption of Convertible Senior Unsecured Notes		(135)		(135)
Gain on Acquisition	4,559		4,559
Gain on Land and Merchant Development Sales	1		963
(Provision) Benefit for Income Taxes	(119)	320	197	(156)
Income from Continuing Operations	5,065	2,920	22,259	21,965
Operating (Loss) Income from Discontinued Operations	(2,261)	138	(2,365)	367
Gain on Sale of Property from Discontinued Operations		618		618
(Loss) Income from Discontinued Operations	(2,261)	756	(2,365)	985
Gain (Loss) on Sale of Property	135	(6)	233	842
Net Income	2,939	3,670	20,127	23,792
Less: Net Income Attributable to Noncontrolling Interests	(1,236)	(367)	(2,328)	(1,381)
Net Income Adjusted for Noncontrolling Interests	1,703	3,303	17,799	22,411
Dividends on Preferred Shares	(8,869)	(8,869)	(17,738)	(17,738)
Net (Loss) Income Attributable to Common Shareholders	(7,166)	(5,566)	61	4,673
Earnings Per Common Share - Basic:
(Loss) income from continuing operations attributable to common shareholders	$ (0.04)	$ (0.05)	$ 0.02	$ 0.03
(Loss) income from discontinued operations	$ (0.02)		$ (0.02)	$ 0.01
Net (loss) income attributable to common shareholders	$ (0.06)	$ (0.05)		$ 0.04
Earnings Per Common Share - Diluted:
(Loss) income from continuing operations attributable to common shareholders	$ (0.04)	$ (0.05)	$ 0.02	$ 0.03
(Loss) income from discontinued operations	$ (0.02)		$ (0.02)	$ 0.01
Net (loss) income attributable to common shareholders	$ (0.06)	$ (0.05)		$ 0.04
Comprehensive Income:
Net income	2,939	3,670	20,127	23,792
Net unrealized loss on derivatives	(401)		(290)
Amortization of loss on derivatives	619	619	1,238	1,328
Comprehensive Income	3,157	4,289	21,075	25,120
Comprehensive Income Attributable to Noncontrolling Interests	(1,236)	(367)	(2,328)	(1,381)
Comprehensive Income Adjusted for Noncontrolling Interests	$ 1,921	$ 3,922	$ 18,747	$ 23,739