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Reportable Segments - Reconciliation of NOI from Rental Real Estate Specific to Continuing Operations (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] |  |  |  |
Rental income | $ 653,532 | $ 669,374 | $ 1,335,837 | $ 1,331,676
Property and maintenance expense | (104,452) | (108,461) | (220,268) | (223,531)
Real estate taxes and insurance expense | (95,038) | (91,446) | (192,770) | (182,888)
Operating income | 356,889 | 369,117 | 778,974 | 578,894
Same Store, Non-same Store and Other |  |  |  |
Segment Reporting Reconciling Item For Operating Profit Loss From Segment To Consolidated [Line Items] |  |  |  |
Rental income | 653,532 | 669,374 | 1,335,837 | 1,331,676
Property and maintenance expense | (104,452) | (108,461) | (220,268) | (223,531)
Real estate taxes and insurance expense | (95,038) | (91,446) | (192,770) | (182,888)
Total operating expenses | (199,490) | (199,907) | (413,038) | (406,419)
Operating income | $ 454,042 | $ 469,467 | $ 922,799 | $ 925,257

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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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 + Details
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- Definition The total amount of revenue recognized for the period from operating leases, including minimum lease revenue, contingent revenue, percentage revenue and sublease revenue. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121549951&loc=d3e39896-112707 + Details
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