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Reportable Segments - Reconciliation of NOI from Rental Real Estate Specific to Continuing Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]
Rental income	$ 623,206	$ 622,433	$ 1,818,867	$ 1,958,270
Property and maintenance expense	(116,461)	(113,065)	(341,261)	(333,333)
Real estate taxes and insurance expense	(96,909)	(95,273)	(297,780)	(288,043)
Operating income	521,554	182,410	1,033,958	961,384
Same Store, Non-same Store and Other
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items]
Rental income	623,206	622,433	1,818,867	1,958,270
Property and maintenance expense	(116,461)	(113,065)	(341,261)	(333,333)
Real estate taxes and insurance expense	(96,909)	(95,273)	(297,780)	(288,043)
Total operating expenses	(213,370)	(208,338)	(639,041)	(621,376)
Operating income	$ 409,836	$ 414,095	$ 1,179,826	$ 1,336,894

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- Definition

The aggregate costs of keeping the property in good condition but that do not appreciably prolong the life or increase the value of the property.

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The total amount of revenue recognized for the period from operating leases, including minimum lease revenue, contingent revenue, percentage revenue and sublease revenue.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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