CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Rental income	$ 384,028	$ 401,876	$ 1,129,099	$ 1,196,596
Income from loans and investments	18,108	32,985	105,706	85,499
Interest and other income	12,554	171	24,535	854
Total revenues	936,538	899,928	2,822,547	2,678,861
Interest	107,581	113,869	331,973	336,245
Depreciation and amortization	218,579	213,407	675,363	655,298
Property-level operating expenses	428,389	376,207	1,262,715	1,111,024
Office building services costs	431	418	1,080	1,708
General, administrative and professional fees	39,677	33,317	113,507	100,560
Loss on extinguishment of debt, net	39,527	511	50,411	856
Merger-related expenses and deal costs	4,458	804	26,288	8,903
Other	1,244	13,030	7,891	16,066
Total expenses	839,886	751,563	2,469,228	2,230,660
Income before unconsolidated entities, income taxes, discontinued operations, real estate dispositions and noncontrolling interests	96,652	148,365	353,319	448,201
(Loss) income from unconsolidated entities	(716)	750	(47,826)	3,794
Income tax benefit	7,327	7,815	11,303	13,119
Income from continuing operations	103,263	156,930	316,796	465,114
Discontinued operations	0	(19)	(10)	(95)
Gain on real estate dispositions	18	458,280	35,893	502,288
Net income	103,281	615,191	352,679	967,307
Net income attributable to noncontrolling interests	1,309	1,233	5,485	3,391
Net income attributable to common stockholders	$ 101,972	$ 613,958	$ 347,194	$ 963,916
Income from continuing operations (in usd per share)	$ 0.29	$ 0.44	$ 0.89	$ 1.31
Net income attributable to common stockholders (in usd per share)	0.29	1.72	0.97	2.71
Income from continuing operations (in usd per share)	0.29	0.44	0.88	1.30
Net income attributable to common stockholders (in usd per share)	$ 0.28	$ 1.71	$ 0.97	$ 2.69
Denominator for basic earnings per share—weighted average shares (in shares)	356,318	355,929	356,224	355,110
Denominator for diluted earnings per share—adjusted weighted average shares (in shares)	359,355	359,333	359,068	358,365
Dividends declared per common share	$ 0.79	$ 0.775	$ 2.37	$ 2.325
Triple-Net Leased Properties
Rental income	$ 190,117	$ 212,370	$ 548,628	$ 634,955
Office Operations
Rental income	193,911	189,506	580,471	561,641
Property-level operating expenses	61,668	60,609	182,662	174,728
Resident Fees and Services
Other revenues	518,560	461,700	1,552,302	1,386,131
Office Building and Other Services Revenue
Other revenues	3,288	3,196	10,905	9,781
Senior Living Operations
Property-level operating expenses	$ 366,721	$ 315,598	$ 1,080,053	$ 936,296