Per Share Data (Tables)

6 Months Ended

Jun. 30, 2012

Per Share Data

Schedule of computation of basic and diluted earnings per share

	For the Three Months Ended June 30,				For the Six Months Ended June 30,
	2012		2011		2012		2011
Net Income available to Common Stockholders — Basic	$	215,445	$	205,121	$	860,855	$	384,532
Effect of dilutive securities:
Impact to General Partner's interest in Operating Partnership from all dilutive securities and options		—		51		—		29
Net Income available to Common Stockholders — Diluted	$	215,445	$	205,172	$	860,855	$	384,561
Weighted Average Shares Outstanding — Basic		303,252,359		293,367,771		299,472,884		293,224,782
Effect of stock options		1,042		34,582		1,079		127,905
Weighted Average Shares Outstanding — Diluted		303,253,401		293,402,353		299,473,963		293,352,687