CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenues:
Rental income	$ 161,421	$ 145,784
Residents fees and services	96,954	82,793
Total revenues	258,375	228,577
Expenses:
Property operating expenses	97,949	85,794
Depreciation	71,223	53,707
General and administrative	10,863	10,574
Acquisition related costs	439	1,158
Impairment of assets	7,390
Total expenses	187,864	151,233
Operating income	70,511	77,344
Interest and other income	64	75
Interest expense	(39,280)	(35,942)
Loss on early extinguishment of debt	(6)	(1,409)
Income from continuing operations before income tax expense and equity in earnings of an investee	31,289	40,068
Income tax expense	(94)	(110)
Equity in earnings of an investee	77	72
Income from continuing operations	31,272	40,030
Discontinued operations:
Loss from discontinued operations		(241)
Net income	31,272	39,789
Other comprehensive income:
Unrealized gain on investments in available for sale securities	24,187	1,448
Equity in unrealized gain of an investee	52	45
Other comprehensive income	24,239	1,493
Comprehensive income	$ 55,511	$ 41,282
Weighted average common shares outstanding (basic) (in shares)	237,315	221,375
Weighted average common shares outstanding (diluted) (in shares)	237,329	221,397
Per common share amounts (basic and diluted):
Income from continuing operations (in dollars per share)	$ 0.13	$ 0.18
Loss from discontinued operations (in dollars per share)		0.00
Net income (in dollars per share)	$ 0.13	$ 0.18