Per Share Data (Tables)

12 Months Ended

Dec. 31, 2012

Per Share Data

Schedule of computation of basic and diluted earnings per share

	For the Year Ended December 31,
	2012		2011		2010
Net Income available to Common Stockholders — Basic	$	1,431,159	$	1,021,462	$	610,424
Effect of dilutive securities:
Impact to General Partner's interest in Operating Partnership from all dilutive securities and options		—		39		97
Net Income available to Common Stockholders — Diluted	$	1,431,159	$	1,021,501	$	610,521
Weighted Average Shares Outstanding — Basic		303,137,350		293,504,064		291,076,008
Effect of stock options		1,072		69,408		274,460
Weighted Average Shares Outstanding — Diluted		303,138,422		293,573,472		291,350,468

Schedule of taxable nature of dividend declared

	For the Year Ended December 31,
	2012		2011		2010
Total dividends paid per common share	$	4.10	$	3.50	$	2.60
Percent taxable as ordinary income		99.50%		98.30%		53.82%
Percent taxable as long-term capital gains		0.50%		1.70%		39.68%
Percent nontaxable as return of capital		—		—		6.50%
		100.0%		100.0%		100.0%