Condensed Consolidated Statements Of Operations And Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Revenues:
Rentals, net	$ 119,747	$ 115,561
Other	2,724	2,546
Total	122,471	118,107
Expenses:
Depreciation and amortization	34,377	32,951
Operating	23,014	21,526
Real estate taxes, net	14,164	14,285
Impairment loss	6,852	770
General and administrative	8,307	6,536
Total	86,714	76,068
Operating Income	35,757	42,039
Interest Expense, net	(31,429)	(36,694)
Interest and Other Income, net	2,386	2,055
Gain on Sale of Real Estate Joint Venture and Partnership Interests	5,562
Equity in Earnings of Real Estate Joint Ventures and Partnerships, net	4,075	3,397
Benefit for Income Taxes	22	316
Income from Continuing Operations	16,373	11,113
Operating Income from Discontinued Operations	2,191	5,015
Gain on Sale of Property from Discontinued Operations	3,634
Income from Discontinued Operations	5,825	5,015
Gain on Sale of Property	440	1,060
Net Income	22,638	17,188
Less: Net Income Attributable to Noncontrolling Interests	(1,441)	(1,092)
Net Income Adjusted for Noncontrolling Interests	21,197	16,096
Dividends on Preferred Shares	(8,869)	(8,869)
Net Income Attributable to Common Shareholders	12,328	7,227
Earnings Per Common Share - Basic:
Income from continuing operations attributable to common shareholders	$ 0.05	$ 0.02
Income from discontinued operations	$ 0.05	$ 0.04
Net income attributable to common shareholders	$ 0.10	$ 0.06
Earnings Per Common Share - Diluted:
Income from continuing operations attributable to common shareholders	$ 0.05	$ 0.02
Income from discontinued operations	$ 0.05	$ 0.04
Net income attributable to common shareholders	$ 0.10	$ 0.06
Comprehensive Income:
Net Income	22,638	17,188
Net unrealized gain on derivatives	16	111
Amortization of loss on derivatives	659	619
Comprehensive Income	23,313	17,918
Comprehensive Income Attributable to Noncontrolling Interests	(1,441)	(1,092)
Comprehensive Income Adjusted for Noncontrolling Interests	$ 21,872	$ 16,826