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Real Estate Activity - Narrative (Details) $ in Thousands |  |  |  |  | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 31, 2024 USD ($) | Dec. 15, 2023 USD ($) apartment | Nov. 06, 2023 USD ($) apartment | Mar. 15, 2023 USD ($) apartment | Sep. 30, 2024 USD ($) | Sep. 30, 2023 USD ($) | Sep. 30, 2024 USD ($) | Sep. 30, 2023 USD ($) | Dec. 31, 2011 USD ($) | Dec. 31, 1998 apartment
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Depreciation |  |  |  |  | $ 2,966 | $ 3,313 | $ 8,970 | $ 9,615 |  |
Clapper |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Number of properties acquired | apartment |  |  |  |  |  |  |  |  |  | 8
Award settled to other party |  |  |  |  |  |  |  |  | $ 148,000 |
Clapper | Subsequent Event |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Payments for legal settlements | $ 23,400 |  |  |  |  |  |  |  |  |
Alera |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Number of units in real estate property | apartment |  |  |  | 240 |  |  |  |  |  |
Real estate investment property, at cost |  |  |  | $ 55,330 |  |  |  |  |  |
Proceeds from construction loans payable |  |  |  | 33,000 |  |  |  |  |  |
Fees related to construction |  |  |  | $ 1,637 |  |  |  |  |  |
Development costs incurred |  |  |  |  |  |  | 31,878 |  |  |
Development fees |  |  |  |  |  |  | 1,005 |  |  |
Merano |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Number of units in real estate property | apartment |  |  | 216 |  |  |  |  |  |  |
Real estate investment property, at cost |  |  | $ 51,910 |  |  |  |  |  |  |
Proceeds from construction loans payable |  |  | 25,407 |  |  |  |  |  |  |
Fees related to construction |  |  | $ 1,551 |  |  |  |  |  |  |
Development costs incurred |  |  |  |  |  |  | 15,588 |  |  |
Development fees |  |  |  |  |  |  | 809 |  |  |
Bandera Ridge |  |  |  |  |  |  |  |  |  |
Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Number of units in real estate property | apartment |  | 216 |  |  |  |  |  |  |  |
Real estate investment property, at cost |  | $ 49,603 |  |  |  |  |  |  |  |
Proceeds from construction loans payable |  | 23,500 |  |  |  |  |  |  |  |
Fees related to construction |  | $ 1,607 |  |  |  |  |  |  |  |
Development costs incurred |  |  |  |  |  |  | 11,087 |  |  |
Development fees |  |  |  |  |  |  | $ 336 |  |  |

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