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Basis of Presentation and Summary of Significant Accounting Policies (Details Textual) - USD ($)
 1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Jun. 30, 2023
Nov. 30, 2019
Sep. 30, 2024
Jun. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2020
Dec. 31, 2023
Dec. 31, 2022
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]                    
Weighted average ownership interest           5.20% 5.10%      
Equity method investment aggregate cost   $ 275,000,000                
Equity method investment term   5 years                
Equity method investment interest rate   10.00%                
Option to acquire equity interest in partnership, percentage           30.00%        
Percentage of noncontrolling position sold 20.00%                  
Proceeds from sale of noncontrolling position $ 33,500,000                  
Mezzanine Investment Due     $ 134,000,000     $ 134,000,000        
Consolidated income (loss) subject to tax     (9,700,000)   $ (5,000,000) (21,600,000) $ (12,400,000)      
Income tax benefit (expense)     3,814,000   6,210,000 8,731,000 10,823,000      
Equity method investment cost basis   $ 275,000,000                
Revenues     1,900,000   1,000,000 4,900,000 1,400,000      
IQHQ [Member]                    
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]                    
Equity method investment aggregate cost     39,185,000     39,185,000     $ 39,185,000 $ 39,200,000
Impairment losses             0      
Commitment purchase amount               $ 50,000,000    
Percentage of ownership of units                   22.00%
Equity method investment redemption with step-up value to be paid in cash                   $ 16,500,000
Equity method investment cost basis     39,185,000     39,185,000     39,185,000 39,200,000
Equity method investments fair value                   $ 59,700,000
Non-cash impairment charge       $ 47,000,000            
Carrying value of the investment     12,714,000 $ 12,700,000   12,714,000     $ 59,686,000  
Aimco OP L.P. [Member]                    
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]                    
Payment made to mezzaine investment $ 134,000,000                  
Minimum annualized returns percentage 19.00%                  
Percentage of residual payments 80.00%                  
Percentage of annualized return on subordinate investment 10.00%                  
Income tax benefit (expense)     $ 3,814,000   $ 6,210,000 $ 8,731,000 $ 10,823,000