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DEBT - Narrative (Details)
9 Months Ended 12 Months Ended
Jul. 26, 2024
extensionOption
Sep. 30, 2025
USD ($)
apartmentCommunity
loan
Dec. 31, 2024
USD ($)
apartmentCommunity
May 31, 2025
USD ($)
Apr. 30, 2025
USD ($)
Oct. 28, 2024
USD ($)
Sep. 30, 2024
USD ($)
Line of Credit Facility [Line Items]              
Number of real estate properties, unencumbered by mortgages | apartmentCommunity   44          
Revolving lines of credit   $ 222,500,000 $ 47,359,000        
Outstanding debt   $ 1,177,284,000 $ 966,623,000        
Weighted average interest rate   3.80% 3.58%        
Mortgages              
Line of Credit Facility [Line Items]              
Outstanding debt   $ 455,900,000 $ 420,400,000        
Number of real estate properties, serving as collateral for mortgage loans | apartmentCommunity   13 15        
Number of material defaults or instances of noncompliance | loan   0          
Private Shelf Agreement | Unsecured Senior Notes              
Line of Credit Facility [Line Items]              
Outstanding debt   $ 175,000,000.0          
Debt instrument, maximum borrowing capacity           $ 300,000,000.0  
Note Purchase Agreement | Unsecured Senior Notes              
Line of Credit Facility [Line Items]              
Debt instrument, face amount   125,000,000.0          
Fannie Mae Credit Facility Agreement | Mortgages              
Line of Credit Facility [Line Items]              
Outstanding debt   198,850,000 $ 198,850,000        
Debt instrument, face amount   $ 198,900,000          
Number of real estate properties, serving as collateral for mortgage loans | apartmentCommunity   11          
Weighted average interest rate   2.78% 2.78%        
Fannie Mae Credit Facility Agreement | Mortgages | Interest Only Payment Date One              
Line of Credit Facility [Line Items]              
Term of debt   7 years          
Fannie Mae Credit Facility Agreement | Mortgages | Interest Only Payment Date Two              
Line of Credit Facility [Line Items]              
Term of debt   10 years          
Fannie Mae Credit Facility Agreement | Mortgages | Interest Only Payment Date Three              
Line of Credit Facility [Line Items]              
Term of debt   12 years          
Line of Credit | BMO Line of Credit              
Line of Credit Facility [Line Items]              
Accordion option       $ 150,000,000.0      
Maximum borrowing capacity       $ 400,000,000.0 $ 250,000,000.0    
Remaining borrowing capacity   $ 177,500,000 $ 206,000,000.0        
Revolving lines of credit   $ 222,500,000 $ 44,000,000.0        
Interest rate   5.51% 5.81%        
Number of extensions | extensionOption 2            
Debt extension term 6 months            
Line of Credit | BMO Line of Credit | Minimum | Base Rate              
Line of Credit Facility [Line Items]              
Basis spread on variable rate 0.20%            
Line of Credit | BMO Line of Credit | Minimum | Secured Overnight Financing Rate (SOFR)              
Line of Credit Facility [Line Items]              
Basis spread on variable rate 1.20%            
Line of Credit | BMO Line of Credit | Maximum | Base Rate              
Line of Credit Facility [Line Items]              
Basis spread on variable rate 0.80%            
Line of Credit | BMO Line of Credit | Maximum | Secured Overnight Financing Rate (SOFR)              
Line of Credit Facility [Line Items]              
Basis spread on variable rate 1.80%            
Operating Line of Credit | US Bank NA              
Line of Credit Facility [Line Items]              
Maximum borrowing capacity             $ 10,000,000.0
Revolving lines of credit   $ 0 $ 3,400,000