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Business Segments (Details Textual) $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2024 USD ($) Dwelling Segment Community Property ApartmentHome | Dec. 31, 2023 USD ($) | Jan. 01, 2023 Property ApartmentHome
Segment Reporting Information [Line Items] |  |  |
Number of reportable segments | Segment | 3 |  |
Development and Redevelopment [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Right-of-use lease assets | $ | $ 108.7 | $ 109.0 |
Lease liabilities | $ | $ 119.3 | $ 118.7 |
Continuing Operations [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Number of real estate properties | ApartmentHome | 5,600 |  |
Planned Apartment Homes [Member] | Continuing Operations [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Number of real estate properties | Property | 909 |  |
Planned Homes [Member] | Continuing Operations [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Number of real estate properties | Property | 16 |  |
Accessory Dwelling Units [Member] | Continuing Operations [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Number of units in real estate property | Dwelling | 8 |  |
Real Estate Partnership [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Number of real estate properties | Community | 10 |  |
Wholly And Partially Owned Consolidated Properties [Member] | Operating Portfolio Segment [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Number of real estate properties | Property |  |  | 21
Wholly And Partially Owned Consolidated Properties [Member] | Planned Apartment Homes [Member] | Operating Portfolio Segment [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Number of units in real estate property | ApartmentHome |  |  | 5,600
Unconsolidated Investment in IQHQ and Mezzanine Investment [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Number of apartment communities | Community | 4 |  |
Number of apartment homes | ApartmentHome | 142 |  |

X
- Definition Lease Liabilities from both finance and operating leases. + References No definition available. + Details
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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482810/280-10-50-18 + Details
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