Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenues:
Rentals, net	$ 127,791	$ 118,292	$ 252,424	$ 233,519
Other	2,400	3,703	5,359	6,303
Total	130,191	121,995	257,783	239,822
Expenses:
Depreciation and amortization	36,630	35,513	77,254	71,691
Operating	23,920	23,498	48,535	46,532
Real estate taxes, net	16,358	14,376	31,007	27,979
Impairment loss	0	165	0	221
General and administrative	5,820	6,184	11,733	12,848
Total	82,728	79,736	168,529	159,271
Operating Income	47,463	42,259	89,254	80,551
Interest Expense, net	(24,310)	(27,025)	(48,890)	(42,464)
Interest and Other Income, net	803	2,097	2,797	3,923
Gain on Sale and Acquisition of Real Estate Joint Venture and Partnership Interests	1,718	83	1,718	11,592
Equity in Earnings of Real Estate Joint Ventures and Partnerships, net	4,048	4,729	8,450	9,342
Benefit (Provision) for Income Taxes	2,081	(147)	1,601	30
Income from Continuing Operations	31,803	21,996	54,930	62,974
Operating Income from Discontinued Operations	63	3,905	342	7,602
Gain on Sale of Property from Discontinued Operations	3,370	78,012	44,582	78,012
Income from Discontinued Operations	3,433	81,917	44,924	85,614
Gain on Sale of Property	1,748	265	1,911	407
Net Income	36,984	104,178	101,765	148,995
Less: Net Income Attributable to Noncontrolling Interests	(1,588)	(37,742)	(3,066)	(39,209)
Net Income Adjusted for Noncontrolling Interests	35,396	66,436	98,699	109,786
Dividends on Preferred Shares	(2,710)	(5,313)	(5,420)	(12,753)
Redemption Costs of Preferred Shares	0	(15,702)	0	(17,944)
Net Income Attributable to Common Shareholders	$ 32,686	$ 45,421	$ 93,279	$ 79,089
Earnings Per Common Share - Basic:
Income from continuing operations attributable to common shareholders	$ 0.24	$ 0.00	$ 0.40	$ 0.25
Income from discontinued operations	$ 0.03	$ 0.37	$ 0.37	$ 0.40
Net income attributable to common shareholders	$ 0.27	$ 0.37	$ 0.77	$ 0.65
Earnings Per Common Share - Diluted:
Income from continuing operations attributable to common shareholders	$ 0.24	$ 0.00	$ 0.39	$ 0.25
Income from discontinued operations	$ 0.03	$ 0.37	$ 0.37	$ 0.40
Net income attributable to common shareholders	$ 0.27	$ 0.37	$ 0.76	$ 0.65