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Acquisition of MPC Partnership Holdings LLC - Narrative (Details) $ in Thousands |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Dec. 19, 2023 USD ($) property fund | Jul. 31, 2024 USD ($) unit | Sep. 30, 2024 USD ($) | Sep. 30, 2023 USD ($) | Sep. 30, 2022 USD ($) | Oct. 01, 2022 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |
Recognition of Earnout liability |  |  | $ 14,547 | $ 0 | $ 0 |
Goodwill |  |  | 71,761 | 1,859 |  |
Total noncontrolling interests |  |  | $ 181,843 | 183,597 |  |
Percent of construction supervision |  |  | 5.00% |  |  |
Property management fees revenue |  |  | $ 76,444 | $ 63,153 | 59,667 |
RMR Residential Acquisition |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Number of units acquired | unit |  | 240 |  |  |  |
Transaction costs |  | $ 509 |  |  |  |
Purchase price |  | $ 70,000 |  |  |  |
Woodstock Property |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Disposal consideration |  |  | 9,800 |  |  |
Disposal depreciation |  |  | 221 |  |  |
Disposal amortization |  |  | 331 |  |  |
Liabilities held for sale |  |  | $ 15 |  |  |
CARROLL Multifamily Venture VII, LP |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Purchase price |  |  |  |  | $ 213 |
MPC Partnership Holdings LLC |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Number of real estate properties | property | 66 |  |  |  |  |
Properties with no ownership interest | property | 14 |  |  |  |  |
Percent of construction supervision | 5.00% |  |  |  |  |
Mortgages |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Debt instrument, interest rate, stated percentage |  | 5.34% |  |  |  |
Maximum |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Percent of gross collected rents |  |  | 3.50% |  |  |
Maximum | MPC Partnership Holdings LLC |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Percent of gross collected rents | 3.50% |  |  |  |  |
Property management fees revenue | $ 200 |  |  |  |  |
Minimum |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Percent of gross collected rents |  |  | 2.50% |  |  |
Minimum | MPC Partnership Holdings LLC |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Percent of gross collected rents | 2.50% |  |  |  |  |
Property management fees revenue | $ 100 |  |  |  |  |
MPC Partnership Holdings LLC |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Payments to acquire businesses, gross | 80,000 |  |  |  |  |
Transaction costs | 4,200 |  |  |  |  | $ 7,302
Goodwill | 69,902 |  |  |  |  |
Mortgage note payable | $ 4,726 |  |  |  |  |
MPC Partnership Holdings LLC | CARROLL Multifamily Venture VII, LP |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Number of funds | fund | 4 |  |  |  |  |
Number of funds fully funded | fund | 3 |  |  |  |  |
Unfunded commitment capital | $ 208,026 |  |  |  |  |
Committed capital | 342,825 |  |  |  |  |
MPC Partnership Holdings LLC | Mortgages |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Mortgage note payable | 4,726 |  |  |  |  |
Mortgage note payable | $ 5,429 |  |  |  |  |
Debt instrument, interest rate, stated percentage | 3.71% |  |  |  |  |
Debt, year one | $ 8 |  |  |  |  |
Debt, year two | 98 |  |  |  |  |
Debt, year three | 102 |  |  |  |  |
Debt, year four | 105 |  |  |  |  |
Debt, after year four | $ 5,116 |  |  |  |  |
MPC Partnership Holdings LLC | Building and improvements |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Weighted average useful life | 25 years |  |  |  |  |
MPC Partnership Holdings LLC | Acquired leases |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Amortization period | 2 years 10 months 24 days |  |  |  |  |
MPC Partnership Holdings LLC | Property management and investment management agreements |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Weighted average useful life | 5 years 7 months 6 days |  |  |  |  |
MPC Partnership Holdings LLC | Investor relationships |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Weighted average useful life | 5 years |  |  |  |  |
MPC Partnership Holdings LLC | 260 Woodstock Investor, LLC |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Ownership percentage | 90.00% |  |  |  |  |
Total noncontrolling interests | $ 444 |  |  |  |  |
MPC Partnership Holdings LLC | Maximum |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Recognition of Earnout liability | $ 20,000 |  |  |  |  |

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