CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Rental income:
Triple-net leased	$ 209,327	$ 214,487
Office	185,895	144,136
Total rental income	395,222	358,623
Resident fees and services	464,188	463,976
Office building and other services revenue	3,406	7,185
Income from loans and investments	20,146	22,386
Interest and other income	481	119
Total revenues	883,443	852,289
Expenses
Interest	108,804	103,273
Depreciation and amortization	217,783	236,387
Property-level operating expenses:
Senior living	312,073	312,541
Office	56,914	43,681
Total property-level operating expenses	368,987	356,222
Office building services costs	738	3,451
General, administrative and professional fees	33,961	31,726
Loss on extinguishment of debt, net	309	314
Merger-related expenses and deal costs	2,056	1,632
Other	1,188	4,168
Total expenses	733,826	737,173
Income before unconsolidated entities, income taxes, discontinued operations, real estate dispositions and noncontrolling interests	149,617	115,116
Income (loss) from unconsolidated entities	3,150	(198)
Income tax benefit	3,145	8,421
Income from continuing operations	155,912	123,339
Discontinued operations	(53)	(489)
Gain on real estate dispositions	43,289	26,184
Net income	199,148	149,034
Net income attributable to noncontrolling interests	1,021	54
Net income attributable to common stockholders	$ 198,127	$ 148,980
Basic:
Income from continuing operations (in usd per share)	$ 0.44	$ 0.37
Net income attributable to common stockholders (in usd per share)	0.56	0.44
Diluted:
Income from continuing operations (in usd per share)	0.44	0.36
Net income attributable to common stockholders (in usd per share)	$ 0.55	$ 0.44
Weighted average shares used in computing earnings per common share:
Basic (in shares)	354,410	335,559
Diluted (in shares)	357,572	339,202
Dividends declared per common share (in usd per share)	$ 0.775	$ 0.73