CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Rental income:
Triple-net leased	$ 210,119	$ 182,006	$ 424,606	$ 370,563
Medical office buildings	144,087	140,472	288,223	277,532
Total rental income	354,206	322,478	712,829	648,095
Resident fees and services	464,437	454,645	928,413	901,559
Medical office building and other services revenue	5,504	9,408	12,689	19,951
Income from loans and investments	24,146	25,215	46,532	47,268
Interest and other income	111	174	230	645
Total revenues	848,404	811,920	1,700,693	1,617,518
Expenses:
Interest	103,665	83,959	206,938	166,287
Depreciation and amortization	221,961	214,711	458,348	430,930
Property-level operating expenses:
Senior living	307,989	299,252	620,530	597,614
Medical office buildings	43,966	43,410	87,647	85,847
Total property-level operating expenses	351,955	342,662	708,177	683,461
Medical office building services costs	1,852	5,764	5,303	12,682
General, administrative and professional fees	32,094	33,959	63,820	68,285
Loss (gain) on extinguishment of debt, net	2,468	(455)	2,782	(434)
Merger-related expenses and deal costs	7,224	12,265	8,856	42,878
Other	2,303	4,279	6,471	9,153
Total expenses	723,522	697,144	1,460,695	1,413,242
Income before unconsolidated entities, income taxes, discontinued operations, real estate dispositions and noncontrolling interest	124,882	114,776	239,998	204,276
Income (loss) from unconsolidated entities	1,418	9	1,220	(242)
Income tax benefit	11,549	9,789	19,970	17,039
Income from continuing operations	137,849	124,574	261,188	221,073
Discontinued operations	(148)	18,243	(637)	35,817
Gain on real estate dispositions	5,739	7,469	31,923	14,155
Net income	143,440	150,286	292,474	271,045
Net income attributable to noncontrolling interest	278	465	332	782
Net income attributable to common stockholders	$ 143,162	$ 149,821	$ 292,142	$ 270,263
Basic:
Income from continuing operations attributable to common stockholders, including real estate dispositions (in usd per share)	$ 0.42	$ 0.39	$ 0.87	$ 0.71
Discontinued operations (in usd per share)	0.00	0.06	0.00	0.11
Net income attributable to common stockholders (in usd per share)	0.42	0.45	0.87	0.82
Diluted:
Income from continuing operations attributable to common stockholders, including real estate dispositions (in usd per share)	0.42	0.40	0.86	0.71
Discontinued operations (in usd per share)	0.00	0.05	0.00	0.11
Net income attributable to common stockholders (in usd per share)	$ 0.42	$ 0.45	$ 0.86	$ 0.82
Weighted average shares used in computing earnings per common share:
Basic (in shares)	338,901	330,715	337,230	327,890
Diluted (in shares)	342,571	334,026	340,851	331,424
Dividends declared per common share (in usd per share)	$ 0.73	$ 0.79	$ 1.46	$ 1.58