CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Rental income:
Triple-net leased	$ 167,870	$ 213,258	$ 358,511	$ 422,585
Office	192,392	186,240	386,560	372,135
Total rental income	360,262	399,498	745,071	794,720
Resident fees and services	518,989	460,243	1,033,742	924,431
Office building and other services revenue	4,289	3,179	7,617	6,585
Income from loans and investments	56,417	32,368	87,598	52,514
Interest and other income	2,347	202	11,981	683
Total revenues	942,304	895,490	1,886,009	1,778,933
Expenses
Interest	113,029	113,572	224,392	222,376
Depreciation and amortization	223,634	224,108	456,784	441,891
Property-level operating expenses:
Senior living	361,112	308,625	713,332	620,698
Office	60,301	57,205	120,994	114,119
Total property-level operating expenses	421,413	365,830	834,326	734,817
Office building services costs	534	552	649	1,290
General, administrative and professional fees	36,656	33,282	73,830	67,243
(Gain) loss on extinguishment of debt, net	(93)	36	10,884	345
Merger-related expenses and deal costs	4,494	6,043	21,830	8,099
Other	3,527	1,848	6,647	3,036
Total expenses	803,194	745,271	1,629,342	1,479,097
Income before unconsolidated entities, income taxes, discontinued operations, real estate dispositions and noncontrolling interests	139,110	150,219	256,667	299,836
(Loss) income from unconsolidated entities	(6,371)	(106)	(47,110)	3,044
Income tax benefit	734	2,159	3,976	5,304
Income from continuing operations	133,473	152,272	213,533	308,184
Discontinued operations	0	(23)	(10)	(76)
Gain on real estate dispositions	35,827	719	35,875	44,008
Net income	169,300	152,968	249,398	352,116
Net income attributable to noncontrolling interests	2,781	1,137	4,176	2,158
Net income attributable to common stockholders	$ 166,519	$ 151,831	$ 245,222	$ 349,958
Basic:
Income from continuing operations (in usd per share)	$ 0.37	$ 0.43	$ 0.60	$ 0.87
Net income attributable to common stockholders (in usd per share)	0.47	0.43	0.69	0.99
Diluted:
Income from continuing operations (in usd per share)	0.37	0.42	0.59	0.86
Net income attributable to common stockholders (in usd per share)	$ 0.46	$ 0.42	$ 0.68	$ 0.98
Weighted average shares used in computing earnings per common share:
Basic (in shares)	356,228	355,024	356,175	354,719
Diluted (in shares)	359,000	358,311	358,931	357,919
Dividends declared per common share (in usd per share)	$ 0.79	$ 0.775	$ 1.58	$ 1.55