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Basis of Presentation and Summary of Significant Accounting Policies (Details Textual) - USD ($)
 1 Months Ended 12 Months Ended
Dec. 31, 2024
Jun. 30, 2023
Mar. 31, 2022
Nov. 30, 2019
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2020
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]                
Weighted average ownership interest         5.20% 5.10% 5.10%  
Preferred equity interest receives preferred return 8.00%              
Preferred equity interest in one joint ventures accruing preferred return 9.70%              
Preferred equity interest accruing preferred return 14.50%              
Percentage of noncontrolling position sold   20.00%            
Proceeds from sale of noncontrolling position   $ 33,500,000            
Percentage of noncontrolling position remaining         80.00%      
Non-refundable payment         $ 4,000,000      
Equity method investment aggregate cost       $ 275,000,000        
Equity method investment term       5 years        
Equity method investment interest rate       10.00%        
Interest costs capitalized         21,500,000 $ 39,700,000 $ 30,600,000  
Other direct and indirect costs capitalized         8,000,000 14,300,000 16,900,000  
Non-cash impairment charge           158,000,000 212,600,000  
Mezzanine investment           0 158,600,000  
Gain (loss) on disposition of real estate         10,600,000 8,000,000 175,900,000  
Impairment         $ 0 0 0  
Estimated useful life 15 years       15 years      
Consolidated income (loss) subject to tax         $ (28,200,000) (15,200,000) 88,800,000  
Income tax expense (benefit)         $ (11,071,000) (12,752,000) 17,264,000  
Percentage of income tax on income from non-arms length transactions 100.00%       100.00%      
Unconsolidated real estate partnerships $ 15,155,000       $ 15,155,000 23,125,000    
Net capitalized implementation costs 5,800,000       5,800,000 4,700,000    
Accumulated depreciation 499,274,000       499,274,000 580,802,000    
Realized and unrealized gains (losses) on equity investments         (49,504,000) 700,000 20,302,000  
Revenues         6,700,000 2,700,000 0  
Advertising costs         2,300,000 1,300,000 1,700,000  
Financing Note [Member]                
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]                
Principal balance amount $ 43,200,000       $ 43,200,000      
Effective interest rate 6.00%       6.00%      
Unamortized discount $ 2,700,000       $ 2,700,000 3,800,000    
Amortization of discount         1,100,000 1,100,000 1,000,000  
Other Assets, Net [Member]                
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]                
Accumulated depreciation 800,000       800,000 100,000    
Unconsolidated Entities [Member]                
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]                
Unconsolidated real estate partnerships     $ 1,800,000          
Cash     300,000          
Non-cash contributions     5,700,000          
Cash contributions     $ 900,000          
Unconsolidated Entities [Member] | Other Income (Expense), Net [Member]                
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]                
Non-cash other than temporary impairment         2,600,000 0 0  
Aimco OP L.P. [Member]                
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]                
Payment made to Mezzaine Investment   $ 134,000,000            
Income tax expense (benefit)         (11,071,000) (12,752,000) 17,264,000  
Accumulated depreciation $ 499,274,000       499,274,000 580,802,000    
Realized and unrealized gains (losses) on equity investments         $ (49,504,000) 700,000 $ 20,302,000  
ASU 2023-07 [Member]                
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]                
Change in Accounting Principle, Accounting Standards Update, Adopted [true false] true       true      
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false] true       true      
Minimum [Member]                
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]                
Estimated useful life 5 years       5 years      
Maximum [Member]                
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]                
Estimated useful life 30 years       30 years      
Furniture, Fixtures and Equipment [Member]                
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]                
Estimated useful life 5 years       5 years      
Equipment [Member]                
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]                
Estimated useful life 5 years       5 years      
IQHQ [Member]                
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]                
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 investments fair value             59,700,000  
Equity method investment aggregate cost $ 39,185,000       $ 39,185,000 39,185,000 39,200,000  
Non-cash impairment charge         48,600,000      
Mezzanine investment $ 11,071,000       11,071,000 59,686,000    
Realized gain on investment             5,700,000  
Unrealized gains (losses) on investment             20,500,000  
Realized and unrealized gains (losses) on equity investments           0    
Property Technology Funds [Member]                
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]                
Unrealized gains (losses) on investment         400,000 0 300,000  
Common Stock [Member]                
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]                
Unrealized gains (losses) on investment         $ (1,300,000) $ 700,000 $ (6,100,000)