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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
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Operating Leased Assets [Line Items] |  |  |
Total lease revenue | $ 2,364,447 | $ 2,464,790 | $ 2,593,829
Rental income | 2,463,997 | 2,571,705 | 2,700,691
Residential Leases [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Total lease revenue | 2,298,099 | 2,417,557 | 2,521,396
Non-Residential Leases [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Total lease revenue | 66,348 | 47,233 | 72,433
Residential and Non-Residential Rent [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Total lease revenue | 2,261,019 | 2,388,441 | 2,486,189
Residential and Non-Residential Rent [Member] | Residential Leases [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Total lease revenue | 2,199,986 | 2,336,778 | 2,414,201
Residential and Non-Residential Rent [Member] | Non-Residential Leases [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Total lease revenue | 61,033 | 51,663 | 71,988
Utility Recoveries (RUBS Income) [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Total lease revenue | 75,569 | 71,376 | 68,576
Utility Recoveries (RUBS Income) [Member] | Residential Leases [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Total lease revenue | 74,846 | 70,699 | 67,659
Utility Recoveries (RUBS Income) [Member] | Non-Residential Leases [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Total lease revenue | 723 | 677 | 917
Parking Rent [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Total lease revenue | 41,499 | 39,155 | 37,905
Parking Rent [Member] | Residential Leases [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Total lease revenue | 40,934 | 38,743 | 37,557
Parking Rent [Member] | Non-Residential Leases [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Total lease revenue | 565 | 412 | 348
Other Lease Revenue [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Total lease revenue | (13,640) | (34,182) | 1,159
Other Lease Revenue [Member] | Residential Leases [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Total lease revenue | (17,667) | (28,663) | 1,979
Other Lease Revenue [Member] | Non-Residential Leases [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Total lease revenue | 4,027 | (5,519) | (820)
Parking Revenue [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Rental income | 26,789 | 22,210 | 28,272
Other Revenue [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Rental income | 72,761 | 84,705 | 78,590
Other Rental Income [Member] |  |  |
Operating Leased Assets [Line Items] |  |  |
Rental income | $ 99,550 | $ 106,915 | $ 106,862

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- Definition Amount of operating lease income from lease payments and variable lease payments paid and payable to lessor. Includes, but is not limited to, variable lease payments not included in measurement of lease receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=124258985&loc=SL77919372-209981 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123420820&loc=SL77919311-209978 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 6A -URI http://asc.fasb.org/extlink&oid=124502072&loc=SL77927221-108306 + Details
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