CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Rental income:
Triple-net leased	$ 190,641	$ 209,327
Office	194,168	185,895
Total rental income	384,809	395,222
Resident fees and services	514,753	464,188
Office building and other services revenue	3,328	3,406
Income from loans and investments	31,181	20,146
Interest and other income	9,634	481
Total revenues	943,705	883,443
Expenses
Interest	111,363	108,804
Depreciation and amortization	233,150	217,783
Property-level operating expenses:
Senior living	352,220	312,073
Office	60,693	56,914
Total property-level operating expenses	412,913	368,987
Office building services costs	115	738
General, administrative and professional fees	37,174	33,961
Loss on extinguishment of debt, net	10,977	309
Merger-related expenses and deal costs	17,336	2,056
Other	3,120	1,188
Total expenses	826,148	733,826
Income before unconsolidated entities, income taxes, discontinued operations, real estate dispositions and noncontrolling interests	117,557	149,617
Loss (income) from unconsolidated entities	(40,739)	3,150
Income tax benefit	3,242	3,145
Income from continuing operations	80,060	155,912
Discontinued operations	(10)	(53)
Gain on real estate dispositions	48	43,289
Net income	80,098	199,148
Net income attributable to noncontrolling interests	1,395	1,021
Net income attributable to common stockholders	$ 78,703	$ 198,127
Basic:
Income from continuing operations (in usd per share)	$ 0.22	$ 0.44
Net income attributable to common stockholders (in usd per share)	0.22	0.56
Diluted:
Income from continuing operations (in usd per share)	0.22	0.44
Net income attributable to common stockholders (in usd per share)	$ 0.22	$ 0.55
Weighted average shares used in computing earnings per common share:
Basic (in shares)	356,112	354,410
Diluted (in shares)	358,853	357,572
Dividends declared per common share (in usd per share)	$ 0.79	$ 0.775