CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND OTHER 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
Revenue:
Rental and other income	$ 242,527	$ 218,658	$ 476,014	$ 432,257
Management, development and other fees	2,332	1,684	4,652	3,533
Total revenue	244,859	220,342	480,666	435,790
Expenses:
Operating expenses, excluding property taxes	68,600	65,804	136,657	130,724
Property taxes	24,152	23,083	48,940	46,171
Interest expense, net	45,855	41,458	90,126	83,999
Depreciation expense	62,894	57,317	124,154	113,250
General and administrative expense	8,145	4,041	15,437	12,936
Total expenses	209,646	191,703	415,314	387,080
Equity in income of unconsolidated entities	395	463	898	689
Income from continuing operations	35,608	29,102	66,250	49,399
Discontinued operations:
Income (loss) from discontinued operations	(91)	35	(197)	1,813
Gain on sale of real estate assets	7,675	21,929	7,675	72,220
Total discontinued operations	7,584	21,964	7,478	74,033
Net income	43,192	51,066	73,728	123,432
Net (income) loss attributable to noncontrolling interests	181	59	(15)	216
Net income attributable to common stockholders	43,373	51,125	73,713	123,648
Other comprehensive income:
Unrealized loss on cash flow hedges	(19,336)	(677)	(19,420)	(135)
Comprehensive income	$ 24,037	$ 50,448	$ 54,293	$ 123,513
Earnings per common share - basic:
Income from continuing operations attributable to common stockholders	$ 0.41	$ 0.35	$ 0.76	$ 0.60
Discontinued operations attributable to common stockholders	$ 0.09	$ 0.26	$ 0.09	$ 0.89
Net income attributable to common stockholders	$ 0.50	$ 0.61	$ 0.85	$ 1.49
Earnings per common share - diluted:
Income from continuing operations attributable to common stockholders	$ 0.40	$ 0.35	$ 0.75	$ 0.60
Discontinued operations attributable to common stockholders	$ 0.09	$ 0.26	$ 0.09	$ 0.89
Net income attributable to common stockholders	$ 0.49	$ 0.61	$ 0.84	$ 1.49
Dividends per common share:	$ 0.8925	$ 0.8925	$ 1.7850	$ 1.7850

The aggregate interest expense incurred on trading liabilities, commercial paper, long-term debt, capital leases, deposits and all other borrowings, net of interest earned.

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