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Business Segments (Details Textual) $ in Millions | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 31, 2023 USD ($) Community Property OfficeBuilding Dwelling Land ApartmentHome | Mar. 31, 2023 Community | Dec. 31, 2023 USD ($) Community Property OfficeBuilding Segment Dwelling ApartmentHome | Dec. 31, 2022 USD ($) | Jan. 01, 2022 Property ApartmentHome
Segment Reporting Information [Line Items] |  |  |  |  |
Number of reportable segments | Segment |  |  | 3 |  |
Development and Redevelopment [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Number of parcel land sold | Land | 1 |  |  |  |
Right-of-use lease assets | $ | $ 109.0 |  | $ 109.0 | $ 110.3 |
Lease liabilities | $ | $ 118.7 |  | $ 118.7 | $ 114.6 |
Continuing Operations [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Number of real estate properties | 26 |  | 26 |  |
Planned Apartment Homes [Member] | Continuing Operations [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Number of real estate properties | 675 |  | 675 |  |
Planned Homes [Member] | Continuing Operations [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Number of real estate properties | 16 |  | 16 |  |
Accessory Dwelling Units [Member] | Continuing Operations [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Number of units in real estate property | Dwelling | 8 |  | 8 |  |
Apartment Homes Redevelopment Completed [Member] | Continuing Operations [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Number of real estate properties | 510 |  | 510 |  |
Commercial Office Building [Member] | Continuing Operations [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Number of real estate properties | OfficeBuilding | 1 |  | 1 |  |
Rooms [Member] | Continuing Operations [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Number of real estate properties | 106 |  | 106 |  |
Unconsolidated Investment In Iqhq And Mezzanine Investment Member |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Number of apartment communities | Community | 4 |  | 4 |  |
Number of apartment homes | ApartmentHome | 142 |  | 142 |  |
Wholly And Partially Owned Consolidated Properties [Member] | Operating Portfolio Segment [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Number of real estate properties |  |  |  |  | 21
Number of residential apartment community reclassified upon reaching stabilization | Community |  | 1 |  |  |
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
Real Estate Partnership [Member] | Development and Redevelopment [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Number of real estate properties | Community | 11 |  | 11 |  |

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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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