Condensed Consolidated Statements of Operations and Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues:
Rentals, net	$ 127,548	$ 119,211	$ 374,266	$ 342,507
Other	3,119	3,108	9,486	8,346
Total	130,667	122,319	383,752	350,853
Expenses:
Depreciation and amortization	37,122	34,591	112,347	97,845
Operating	25,530	25,191	74,213	69,048
Real estate taxes, net	15,624	14,499	45,242	41,306
Impairment loss	2,358	197	2,579	9,585
General and administrative	5,966	6,417	18,818	21,101
Total	86,600	80,895	253,199	238,885
Operating Income	44,067	41,424	130,553	111,968
Interest Expense, net	(27,660)	(27,482)	(73,689)	(86,692)
Interest and Other Income, net	1,864	1,818	5,788	4,786
Gain on Sale of Real Estate Joint Venture and Partnership Interests	7	0	11,599	5,562
Equity in Earnings (Losses) of Real Estate Joint Ventures and Partnerships, net	5,125	4,905	14,467	(6,715)
Gain on Acquisition	0	1,869	0	1,869
Benefit (Provision) for Income Taxes	215	(722)	214	(378)
Income from Continuing Operations	23,618	21,812	88,932	30,400
Operating Income from Discontinued Operations	394	5,074	5,656	16,463
Gain on Sale of Property from Discontinued Operations	38,214	14,826	116,226	49,724
Income from Discontinued Operations	38,608	19,900	121,882	66,187
Gain on Sale of Property	163	335	570	859
Net Income	62,389	42,047	211,384	97,446
Less: Net Income Attributable to Noncontrolling Interests	(1,847)	(1,774)	(41,056)	(4,557)
Net Income Adjusted for Noncontrolling Interests	60,542	40,273	170,328	92,889
Dividends on Preferred Shares	(2,710)	(8,869)	(15,463)	(26,607)
Redemption Costs of Preferred Shares	0	0	(17,944)	0
Net Income Attributable to Common Shareholders	57,832	31,404	136,921	66,282
Earnings Per Common Share - Basic:
Income from continuing operations attributable to common shareholders	$ 0.16	$ 0.10	$ 0.43	$ 0.01
Income from discontinued operations	$ 0.32	$ 0.16	$ 0.70	$ 0.54
Net income attributable to common shareholders	$ 0.48	$ 0.26	$ 1.13	$ 0.55
Earnings Per Common Share - Diluted:
Income from continuing operations attributable to common shareholders	$ 0.16	$ 0.10	$ 0.43	$ 0.01
Income from discontinued operations	$ 0.31	$ 0.16	$ 0.69	$ 0.53
Net income attributable to common shareholders	$ 0.47	$ 0.26	$ 1.12	$ 0.54
Comprehensive Income:
Net Income	62,389	42,047	211,384	97,446
Other Comprehensive Income:
Net unrealized loss on investments, net of taxes	(34)	0	(34)	0
Net unrealized gain (loss) on derivatives	(293)	(49)	6,735	(181)
Amortization of loss on derivatives	480	664	1,802	1,985
Retirement liability adjustment	364	0	1,093	0
Total	517	615	9,596	1,804
Comprehensive Income	62,906	42,662	220,980	99,250
Comprehensive Income Attributable to Noncontrolling Interests	(1,847)	(1,774)	(41,056)	(4,557)
Comprehensive Income Adjusted for Noncontrolling Interests	$ 61,059	$ 40,888	$ 179,924	$ 94,693