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Schedule III: Real Estate and Accumulated Depreciation - Summary Real Estate and Accumulated Depreciation (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Total portfolio |  |  |
Total real estate balance at beginning of year | $ 2,214,623 |  |
Additions during the year: |  |  |
Total real estate balance at end of year | 1,747,107 | $ 2,214,623 |
Accumulated depreciation balance at beginning of year | 580,802 |  |
Accumulated depreciation balance at end of year | 499,274 | 580,802 |
Aimco Real Estate |  |  |
Total portfolio |  |  |
Total real estate balance at beginning of year | 2,214,623 | 1,963,483 | $ 1,791,499
Additions during the year: |  |  |
Acquisitions |  | 1,893 | 146,236
Capital additions | 141,672 | 292,921 | 273,380
Dispositions | (193,878) | (30,347) | (233,308)
Write-offs of fully depreciated assets and other | (15,541) | (13,327) | (14,324)
Amounts related to assets held for sale | (399,769) |  |
Total real estate balance at end of year | 1,747,107 | 2,214,623 | 1,963,483
Accumulated depreciation balance at beginning of year | 580,802 | 530,722 | 561,115
Depreciation | 79,609 | 63,407 | 143,983
Dispositions | (18,756) |  | (160,052)
Write-offs of fully depreciated assets and other | (15,541) | (13,327) | (14,324)
Amounts related to assets held for sale | (126,840) |  |
Accumulated depreciation balance at end of year | $ 499,274 | $ 580,802 | $ 530,722

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- Definition Amount of accumulated depreciation pertaining to real estate investments for entities with a substantial portion of business acquiring and holding investment real estate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 970 -SubTopic 360 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-28(Column F)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478979/970-360-S99-1 + Details
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