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Organization (Details) | Sep. 30, 2021 a ft² apartment property | Sep. 30, 2020
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Commercial Properties |  |
Real Estate Properties [Line Items] |  |
Number of real estate properties | 5 |
Area of property | ft² | 1,063,512 |
Office Building |  |
Real Estate Properties [Line Items] |  |
Number of real estate properties | 4 |
Retail Site |  |
Real Estate Properties [Line Items] |  |
Number of real estate properties | 1 |
Apartment Building |  |
Real Estate Properties [Line Items] |  |
Number of real estate properties | 9 |
Number of units in real estate property | apartment | 1,492 |
Land and Land Improvements |  |
Real Estate Properties [Line Items] |  |
Area of land | a | 1,827 |
VAA |  |
Real Estate Properties [Line Items] |  |
Number of units in real estate property | apartment | 10,032 |
Percentage of ownership in VAA | 50.00% |
VAA | Apartment Building |  |
Real Estate Properties [Line Items] |  |
Number of real estate properties | 52 |
ARL | Related Party Entities | Majority shareholder |  |
Real Estate Properties [Line Items] |  |
Ownership interest | 90.00% |
TCI |  |
Real Estate Properties [Line Items] |  |
Ownership interest | 78.40% | 78.40%

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