v2.3.0.15

Acquisitions of Real Estate Property (Details 1) (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
The effect of material acquisitions on net income and earnings per share
Revenues	$ 565,424	$ 556,779	$ 1,698,376	$ 1,625,552
Income from continuing operations attributable to common stockholders	183,517	90,891	399,249	280,216
Discontinued operations		542		7,139
Net income attributable to common stockholders	$ 183,517	$ 91,433	$ 399,249	$ 287,355
Basic:
Income from continuing operations attributable to common stockholders	$ 0.64	$ 0.32	$ 1.39	$ 1.00
Discontinued operations		$ 0.00		$ 0.02
Net income attributable to common stockholders	$ 0.64	$ 0.32	$ 1.39	$ 1.02
Diluted:
Income from continuing operations attributable to common stockholders	$ 0.63	$ 0.32	$ 1.38	$ 0.99
Discontinued operations		$ 0.00		$ 0.03
Net income attributable to common stockholders	$ 0.63	$ 0.32	$ 1.38	$ 1.02
Weighted average shares used in computing earnings per common share:
Basic	287,365	281,439	286,647	281,374
Diluted	290,794	282,749	289,027	282,261

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The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

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