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Basis of Presentation and Summary of Significant Accounting Policies (Details Textual) - USD ($)
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2025
Jan. 31, 2025
Jun. 30, 2023
Nov. 30, 2019
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Dec. 31, 2020
Dec. 31, 2022
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]                      
Weighted average ownership interest             5.20% 5.20%      
Equity method investment aggregate cost       $ 275,000,000              
Equity method investment term       5 years              
Equity method investment interest rate       10.00%              
Percentage of noncontrolling position sold     20.00%                
Proceeds from sale of noncontrolling position     $ 33,500,000                
Consolidated income (loss) subject to tax         $ (900,000) $ (5,300,000) $ (3,200,000) $ (11,900,000)      
Income tax benefit (expense)         (5,571,000) 2,188,000 (5,486,000) 4,917,000      
Revenues         2,100,000 1,800,000 3,500,000 3,000,000      
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%                    
Realized and unrealized gains (losses) on equity investments         (210,000) (47,264,000) (607,000) (47,535,000)      
Forfeitable dividends on certain unvested share-based compensation awards to be paid upon achievement $ 1,000,000       1,000,000   1,000,000        
Property Technology Funds [Member]                      
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]                      
Unrealized gains (losses) on investment             100,000 200,000      
Common Stock [Member]                      
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]                      
Unrealized gains (losses) on investment         (200,000) (300,000) (700,000) (700,000)      
Financing Note [Member]                      
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]                      
Debt instrument, face amount $ 43,200,000       $ 43,200,000   $ 43,200,000        
Effective interest rate 6.00%       6.00%   6.00%        
Unamortized discount $ 2,100,000       $ 2,100,000   $ 2,100,000   $ 2,700,000    
Amortization of discount         300,000 600,000 300,000 600,000      
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   39,185,000   $ 39,200,000
Commitment purchase amount                   $ 50,000  
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
Non-cash impairment charge                 48,600,000    
Mezzanine investment $ 11,071,000       11,071,000   11,071,000   $ 11,071,000    
Aimco OP L.P. [Member]                      
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]                      
Payment made to mezzaine investment     $ 134,000,000                
Income tax benefit (expense)         (5,571,000) 2,188,000 (5,486,000) 4,917,000      
Realized and unrealized gains (losses) on equity investments         $ (210,000) $ (47,264,000) $ (607,000) $ (47,535,000)      
S 2025 Q1 Dividends [Member]                      
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]                      
Cash dividend paid per share   $ 0.6                  
Dividends payable, date declared                 Dec. 19, 2024    
Dividends payable, date of record                 Jan. 14, 2025    
Dividends payable, month and year to be paid                 2025-01