Segment Reporting (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Reconciliation of NOI to net income
Net income	$ 168,006	$ 170,418
Indirect operating expenses, net of corporate income	22,799	19,722
Expensed transaction, development and other pursuit costs, net of recoveries	3,334	622
Interest expense, net	55,914	47,892
Loss on extinguishment of debt, net	9,170	280
General and administrative expense	17,320	13,706
Equity in (income) loss of unconsolidated real estate entities	(1,175)	1,060
Depreciation expense	177,911	162,057
Income Tax Expense (Benefit)	91	(6)
Gain on sale of communities	(24,436)	(14,835)
Gain on other real estate transactions, net	(43)	(267)
Gain (Loss) on Sale of Other Investments	(3,460)	473
Net operating income from real estate assets sold or held for sale	(896)	(6,205)
Net operating income	$ 424,535	$ 394,917