v3.26.1
Net Assets in Liquidation - Reconciliation of Equity Under Going Concern Basis of Accounting to Net Assets in Liquidation Under Liquidation Basis of Accounting (Details) - USD ($)
$ in Thousands
Jan. 31, 2026
Mar. 31, 2026
Dec. 31, 2025
Mar. 31, 2025
Dec. 31, 2024
Liquidation Basis Of Accounting [Line Items]          
Equity balances $ 388,814   $ 394,593 $ 156,163 $ 169,366
Increase due to estimated net realizable value of real estate 596,664        
Increase due to estimated net realizable value of unconsolidated partnerships 29,403        
Decrease due to estimated net realizable value of notes receivable (1,512)        
Decrease due to estimated net realizable value of other assets, net (10,953)        
Increase due to remeasurement of liabilities 114,154        
Decrease due to write-off of prepaid assets and deferred costs (29,684)        
Decrease due to liabilities for estimated costs in excess of estimated receipts during liquidation (145,674)        
Decrease due to allocation to noncontrolling interest in Aimco Operating Partnership (29,156)        
Adjustment to reflect the change to the liquidation basis of accounting 523,242        
Estimated value of net assets in liquidation 921,212 $ 705,902      
Increase due to allocation of noncontrolling interest in Aimco Operating Partnership 29,156        
Total Aimco Equity [Member]          
Liquidation Basis Of Accounting [Line Items]          
Equity balances 356,354   $ 361,853 $ 110,486 $ 122,957
Aimco [Member]          
Liquidation Basis Of Accounting [Line Items]          
Estimated value of net assets in liquidation 879,596 671,569      
Noncontrolling Interests Aimco Operating Partnership [Member]          
Liquidation Basis Of Accounting [Line Items]          
Equity balances 12,460        
Estimated value of net assets in liquidation 41,616 $ 34,333      
Partners Capital Attributable To The Partnership [Member]          
Liquidation Basis Of Accounting [Line Items]          
Increase due to estimated net realizable value of real estate 596,664        
Increase due to estimated net realizable value of unconsolidated partnerships 29,403        
Decrease due to estimated net realizable value of notes receivable (1,512)        
Decrease due to estimated net realizable value of other assets, net (10,953)        
Increase due to remeasurement of liabilities 114,154        
Decrease due to write-off of prepaid assets and deferred costs (29,684)        
Decrease due to liabilities for estimated costs in excess of estimated receipts during liquidation (145,674)        
Adjustment to reflect the change to the liquidation basis of accounting 552,398        
Partners Capital Attributable To The Partnership [Member] | Total Aimco Equity [Member]          
Liquidation Basis Of Accounting [Line Items]          
Equity balances $ 368,814