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Leases - Summary of Lease Income Types Relating to Lease Payments Along With the Total Other Rental Income (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Operating Leased Assets [Line Items] |  |  |
Total lease revenue | $ 2,514,187 | $ 2,608,103 |
Rental income | 2,571,705 | 2,700,691 | $ 2,577,681
Residential Leases [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Total lease revenue | 2,461,351 | 2,534,779 |
Non-Residential Leases [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Total lease revenue | 52,836 | 73,324 |
Residential and Non-Residential Rent [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Total lease revenue | 2,388,441 | 2,486,189 |
Residential and Non-Residential Rent [Member] | Residential Leases [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Total lease revenue | 2,336,778 | 2,414,201 |
Residential and Non-Residential Rent [Member] | Non-Residential Leases [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Total lease revenue | 51,663 | 71,988 |
Utility Recoveries (RUBS Income) [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Total lease revenue | 71,376 | 68,576 |
Utility Recoveries (RUBS Income) [Member] | Residential Leases [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Total lease revenue | 70,699 | 67,659 |
Utility Recoveries (RUBS Income) [Member] | Non-Residential Leases [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Total lease revenue | 677 | 917 |
Parking Rent [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Total lease revenue | 39,155 | 37,905 |
Parking Rent [Member] | Residential Leases [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Total lease revenue | 38,743 | 37,557 |
Parking Rent [Member] | Non-Residential Leases [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Total lease revenue | 412 | 348 |
Storage Rent [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Total lease revenue | 3,758 | 3,816 |
Storage Rent [Member] | Residential Leases [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Total lease revenue | 3,674 | 3,745 |
Storage Rent [Member] | Non-Residential Leases [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Total lease revenue | 84 | 71 |
Pet Rent [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Total lease revenue | 11,457 | 11,617 |
Pet Rent [Member] | Residential Leases [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Total lease revenue | 11,457 | 11,617 |
Parking Revenue |  |  |
Operating Leased Assets [Line Items] |  |  |
Rental income | 22,210 | 28,272 |
Other Revenue |  |  |
Operating Leased Assets [Line Items] |  |  |
Rental income | 35,308 | 64,316 |
Other Rental Income [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Rental income | $ 57,518 | $ 92,588 |

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- Definition 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. + References No definition available. + 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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