CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenue:
Rental and other income	$ 559,906	$ 521,126
Management, development and other fees	886	1,200
Total revenue	560,792	522,326
Expenses:
Operating expenses, excluding property taxes	132,024	123,044
Property taxes	59,896	52,930
Interest expense, net	55,113	49,295
Loss on extinguishment of debt, net	397	0
Depreciation expense	159,059	140,621
General and administrative expense	13,664	13,206
Expensed acquisition, development and other pursuit costs, net of recoveries	800	728
Casualty and impairment (gain) loss, net	58	(11,688)
Total expenses	420,895	391,512
Income before equity in income of unconsolidated real estate entities, gain (loss) on sale of communities and other real estate, and income taxes	139,897	130,814
Equity in income of unconsolidated real estate entities	1,740	16,672
Gain on sale of communities	0	87,949
(Loss) gain on other real estate transactions	(47)	366
Income before income taxes	141,590	235,801
Income tax expense	0	20
Net income	141,590	235,781
Net loss attributable to noncontrolling interests	53	94
Net income attributable to common stockholders	141,643	235,875
Other comprehensive income:
Gain on cash flow hedges	11,501	145
Cash flow hedge losses reclassified to earnings	1,756	1,752
Comprehensive income	$ 154,900	$ 237,772
Earnings per common share - basic:
Net income attributable to common stockholders (in dollars per share)	$ 1.03	$ 1.72
Earnings per common share - diluted:
Net income attributable to common stockholders (in dollars per share)	1.03	1.72
Dividends per common share (in dollars per share)	$ 1.47	$ 1.42