Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues:
Total revenues		$ 1,236,379	$ 1,091,483	$ 3,459,256	$ 3,212,383
Expenses:
Interest expense		138,032	122,578	382,223	357,405
Property operating expenses		657,157	523,997	1,782,373	1,536,021
Depreciation and amortization		243,149	230,138	707,625	683,262
General and administrative		28,746	29,913	95,282	93,643
Loss (gain) on derivatives and financial instruments, net		8,991	324	(5,642)	2,284
Loss (gain) on extinguishment of debt, net		4,038	0	16,044	36,870
Impairment of assets		6,740	0	39,557	24,662
Other expenses		88,626	99,595	102,396	117,608
Total expenses		1,175,479	1,006,545	3,119,858	2,851,755
Income (loss) from continuing operations before income taxes and income from unconsolidated entities, total		60,900	84,938	339,398	360,628
Income tax (expense) benefit		(1,741)	(669)	(7,170)	5,535
Income (loss) from unconsolidated entities		344	3,408	(836)	(23,676)
Income from continuing operations		59,503	87,677	331,392	342,487
Gain (loss) on real estate dispositions, net		24,723	1,622	373,662	287,869
Net income		84,226	89,299	705,054	630,356
Less: Preferred stock dividends		11,676	11,676	35,028	37,734
Less: Preferred stock redemption charge		0	0	0	9,769
Less: Net income (loss) attributable to noncontrolling interests	[1]	8,166	3,580	13,539	7,735
Net income (loss) attributable to common stockholders		$ 64,384	$ 74,043	$ 656,487	$ 575,118
Average number of common shares outstanding:
Basic (in shares)		373,023,000	369,089,000	372,052,000	366,096,000
Diluted (in shares)		374,487,000	370,740,000	373,638,000	367,894,000
Basic:
Income (loss) from continuing operations attributable to common stockholders, including real estate dispositions (in USD per share)		$ 0.16	$ 0.24	$ 0.89	$ 0.94
Net income (loss) attributable to common stockholders, total (in USD per share)		0.17	0.20	1.76	1.57
Diluted:
Income (loss) from continuing operations attributable to common stockholders, including real estate dispositions (in USD per share)		0.16	0.24	0.89	0.93
Net income (loss) attributable to common stockholders, total (in USD per share)		0.17	0.20	1.76	1.56
Dividends declared and paid per common share (in USD per share)		$ 0.87	$ 0.87	$ 2.6100	$ 2.6100
Rental income
Revenues:
Total revenues		$ 342,887	$ 362,880	$ 1,019,857	$ 1,085,621
Resident fees and services
Revenues:
Total revenues		875,171	702,380	2,374,450	2,049,757
Interest income
Revenues:
Total revenues		14,622	20,187	42,732	61,836
Other income
Revenues:
Total revenues		$ 3,699	$ 6,036	$ 22,217	$ 15,169

[1] Includes amounts attributable to redeemable noncontrolling interests.