CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue:
Operating Lease, Lease Income	$ 2,319,666	$ 2,280,963	$ 2,154,481
Management, development and other fees	4,960	3,572	4,147
Total revenue	2,324,626	2,284,535	2,158,628
Expenses:
Cost of Other Property Operating Expense	515,145	524,993	500,924
Property taxes	252,961	241,563	221,375
Interest expense, net	203,585	220,974	199,661
Loss on extinguishment of debt, net	602	17,492	25,472
Depreciation expense	661,578	631,196	584,150
General and administrative expense	58,042	60,369	53,695
Other Nonoperating Expense	4,991	3,265	2,736
Casualty and impairment loss, net	0	215	6,250
Total expenses	1,696,904	1,700,067	1,594,263
Equity in income of unconsolidated real estate entities	8,652	15,270	70,744
Gain on sale of communities	166,105	374,976	252,599
Gain (loss) on other real estate transactions, net	439	345	(10,907)
Other Selling, General and Administrative Expense	(3,812)	(1,044)	0
Income before income taxes	799,106	974,015	876,801
Income Tax Expense (Benefit)	13,003	(160)	141
Net income	786,103	974,175	876,660
Net (income) loss attributable to noncontrolling interests	(129)	350	261
Net income attributable to common stockholders	785,974	974,525	876,921
Other comprehensive income (loss):
(Loss) gain on cash flow hedges	(11,930)	5,132	(13,979)
Cash flow hedge losses reclassified to earnings	(6,571)	(6,143)	(7,070)
Comprehensive income	$ 780,615	$ 985,800	$ 870,012
Earnings per common share - basic:
Net income per common share - basic (in dollars per share)	$ 5.64	$ 7.05	$ 6.36
Earnings per common share - diluted:
Net income per common share - diluted (in dollars per share)	$ 5.63	$ 7.05	$ 6.35