Investments (Details) $ in Thousands		1 Months Ended		12 Months Ended
	Oct. 30, 2025 USD ($)	Dec. 31, 2024 USD ($)	Jul. 31, 2024 USD ($)	Sep. 30, 2025 USD ($) joint_venture unit shares	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	May 15, 2023 USD ($) shares
Schedule of Equity Method Investments [Line Items]
(Loss) gain on investments				$ (5,085)	$ 7,260	$ 25,237
Distributions from investments				2,272	2,391	2,221
Payments to acquire equity method investments				768	213	0
Accounts payable and accrued expenses				38,701	31,599
Earnout liability				$ 3,639	11,958	0
Number of joint ventures owned | joint_venture				2
Investments				$ 31,900	23,733
Residential Community, Pompano Beach, FL
Schedule of Equity Method Investments [Line Items]
Number of units acquired | unit				225
Residential Community, Sunrise, FL
Schedule of Equity Method Investments [Line Items]
Number of units acquired | unit				400
Sunrise JV
Schedule of Equity Method Investments [Line Items]
Purchase price				$ 190,100
Recurring basis
Schedule of Equity Method Investments [Line Items]
Investments				17,610	23,520
SEVN
Schedule of Equity Method Investments [Line Items]
(Loss) gain on investments				(3,638)	7,260	5,295
Distributions from investments				2,272	2,391	2,221
SEVN | Subsequent Event | Transferrable Rights Offering
Schedule of Equity Method Investments [Line Items]
Sale of stock transaction	$ 65
SEVN | Recurring basis
Schedule of Equity Method Investments [Line Items]
Investments				$ 17,610	$ 23,520
SEVN | Related Party | Tremont Reality Capital
Schedule of Equity Method Investments [Line Items]
Number of shares owned (in shares) | shares				1,708,058
Ownership percentage				11.30%
CARROLL Multifamily Venture VII, LP
Schedule of Equity Method Investments [Line Items]
Payments to acquire equity method investments			$ 213
Carroll MF VII, LLC
Schedule of Equity Method Investments [Line Items]
Ownership percentage		14.30%
(Loss) gain on investments				$ (1,447)
Payments to acquire equity method investments		$ 768
Investments				3,156
Carroll MF VII, LLC | Related Party
Schedule of Equity Method Investments [Line Items]
Accounts payable and accrued expenses				695
Sunrise JV
Schedule of Equity Method Investments [Line Items]
Payments to acquire equity method investments				$ 11,134
TA
Schedule of Equity Method Investments [Line Items]
(Loss) gain on investments						$ 19,942
TA | RMR LLC
Schedule of Equity Method Investments [Line Items]
Number of shares owned (in shares) | shares							621,853
Ownership percentage							4.10%
Aggregate cost							$ 13,701