Consolidated Statements of Income (Unaudited) (USD $)	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Revenues:
Rental income	$ 354,148,000		$ 308,512,000		$ 1,038,451,000		$ 900,028,000
Resident fees and services	482,412,000		466,127,000		1,406,316,000		1,164,446,000
Interest income	9,344,000		7,629,000		26,871,000		24,325,000
Other income	1,619,000		1,443,000		4,139,000		3,168,000
Total revenues	847,523,000		783,711,000		2,475,777,000		2,091,967,000
Expenses:
Interest expense	118,435,000		116,020,000		360,334,000		334,321,000
Property operating expenses	355,157,000		341,921,000		1,040,342,000		872,701,000
Depreciation and amortization	200,970,000		241,027,000		648,737,000		623,777,000
General and administrative	30,803,000		28,718,000		115,327,000		79,799,000
Transaction costs	13,554,000		23,591,000		21,546,000		117,707,000
Loss (gain) on derivatives, net	49,000		4,872,000		400,000		4,465,000
Loss (gain) on extinguishment of debt, net	2,692,000		(4,068,000)		(3,075,000)		4,376,000
Other expenses	10,262,000				10,262,000
Total expenses	731,922,000		752,081,000		2,200,023,000		2,028,394,000
Income (loss) from continuing operations before income taxes and income from unconsolidated entities, total	115,601,000		31,630,000		275,754,000		63,573,000
Income tax (expense) benefit	10,198,000		(3,077,000)		6,369,000		(7,055,000)
Income (loss) from unconsolidated entities	(2,632,000)		(331,000)		(19,705,000)		(3,529,000)
Income (loss) from continuing operations	123,167,000		28,222,000		262,418,000		52,989,000
Discontinued operations:
Gain (loss) on sales of discontinued properties, net	0		4,707,000		6,411,000		57,202,000
Income (loss) from discontinued operations, net	0		676,000		724,000		2,397,000
Discontinued operations, net	0		5,383,000		7,135,000		59,599,000
Gain (loss) on real estate dispositions, net	29,604,000		0		36,272,000		0
Net income	152,771,000		33,605,000		305,825,000		112,588,000
Less: Preferred stock dividends	16,352,000		16,602,000		49,057,000		49,805,000
Less: Net income (loss) attributable to noncontrolling interests	164,000	[1]	(3,688,000)	[1]	(1,339,000)	[1]	(4,462,000)	[1]
Net income (loss) attributable to common stockholders	$ 136,255,000		$ 20,691,000		$ 258,107,000		$ 67,245,000
Average number of common shares outstanding:
Basic	311,117,000		286,020,000		299,137,000		273,148,000
Diluted	312,812,000		288,029,000		300,645,000		275,247,000
Basic:
Income (loss) from continuing operations attributable to common stockholders, including real estate dispositions	$ 0.44		$ 0.05		$ 0.84		$ 0.03
Discontinued operations, net	$ 0		$ 0.02		$ 0.02		$ 0.22
Net income (loss) attributable to common stockholders, total	$ 0.44		$ 0.07		$ 0.86		$ 0.25
Diluted:
Income (loss) from continuing operations attributable to common stockholders, including real estate dispositions	$ 0.44		$ 0.05		$ 0.83		$ 0.03
Discontinued operations, net	$ 0		$ 0.02		$ 0.02		$ 0.22
Net income (loss) attributable to common stockholders, total	$ 0.44		$ 0.07		$ 0.86		$ 0.24
Dividends declared and paid per common share	$ 0.795		$ 0.765		$ 2.385		$ 2.295

[1] (1) Includes amounts attributable to redeemable noncontrolling interests.