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v3.20.4

Organization (Details) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2020 | Dec. 31, 2020 shares | Dec. 31, 2020 USD ($) | Dec. 31, 2020 community | Dec. 31, 2020 apartment | Dec. 31, 2020 building | Dec. 31, 2020 investment | Dec. 31, 2020 project | Dec. 31, 2019 USD ($) shares
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |
Limited partner - ownership percentage | 3.40% |  |  |  |  |  |  |  | 3.40%
Operating Partnership units outstanding (in shares) | shares |  | 2,294,760 |  |  |  |  |  |  | 2,301,653
Redemption value of operating partnership units outstanding | $ |  |  | $ 544.8 |  |  |  |  |  | $ 692.5
Number of apartment communities owned |  |  |  | 246 | 2 |  |  |  |
Number of apartment units owned | apartment |  |  |  |  | 60,272 |  |  |  |
Ownership interests, number of commercial buildings | building |  |  |  |  |  | 1 |  |  |
Ownership interests, number of consolidated projects | project |  |  |  |  |  |  |  | 3 |
Ownership Interests, number of unconsolidated projects | investment |  |  |  |  |  |  | 3 |  |
Operating Partnership |  |  |  |  |  |  |  |  |
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] |  |  |  |  |  |  |  |  |
General partner ownership interest | 96.60% |  |  |  |  |  |  |  |

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- Definition Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055 + Details
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