v3.26.1
Basis of Presentation and Summary of Significant Accounting Policies (Details Textual)
$ in Thousands
 1 Months Ended 3 Months Ended 6 Months Ended
Jan. 31, 2026
USD ($)
Jun. 30, 2025
Jun. 30, 2023
USD ($)
Nov. 30, 2019
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
Property
Jun. 30, 2026
Apartments
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]                    
Weighted average ownership interest 3.40% 5.20%         4.20%      
Equity method investment aggregate cost       $ 275,000            
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              
Notes receivable         $ 85,000   $ 85,000      
Other investments         4,500   4,500      
Unconsolidated real estate partnerships         1,900   $ 1,900      
Income tax benefit (expense) $ 0         $ (5,571)   $ (5,486)    
Preferred equity interest accruing preferred return             14.50%      
Noncontrolling interest in consolidated real estate partnerships         20,000   $ 20,000      
Third-party equity position annual payments         1,200   1,200      
Realized and unrealized gains (losses) on equity investments 258         (210)   (607)    
NEW YORK                    
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]                    
Number of apartment communities | Property                 3  
Atlanta, Georgia [Member]                    
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]                    
Number of apartment communities | Property                 1  
New York City and Atlanta, Georgia [Member]                    
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]                    
Proceeds from sale of property         79,400          
Unconsolidated Properties [Member] | San Diego, California [Member]                    
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]                    
Number of apartment communities                 4 4
Proceeds from sale of property         41,900          
Transaction costs         900          
Non-recourse construction loans and bridge financing                    
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]                    
Non-recourse property debt         411,600   411,600      
Non Recourse Property Debt                    
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]                    
Non-recourse property debt         18,500   18,500      
Aimco OP L.P. [Member]                    
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]                    
Payment made to mezzaine investment     $ 134,000              
Income tax benefit (expense)           (5,571)   (5,486)    
Realized and unrealized gains (losses) on equity investments $ 258         $ (210)   $ (607)    
S 2026 Q2 Dividends [Member]                    
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]                    
Forfeitable dividends on certain unvested share-based compensation awards to be paid upon achievement         $ 3,800   $ 3,800