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Investments in Equity Affiliates - Narrative (Details) $ in Thousands	1 Months Ended	3 Months Ended				9 Months Ended		12 Months Ended
	Apr. 30, 2024 USD ($)	Sep. 30, 2024 USD ($)	Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($) investment	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Investment in Equity Affiliates
Income (loss) from equity affiliates		$ 3,177			$ 809	$ 7,388	$ 20,694
Indirect ownership percentage						12.30%		12.30%
Payments to acquire interest in newly formed entity						$ 17,845	1,029
Bridge loans, total UPB						629,255		$ 427,929
Number of investments purchased | investment				4
Loans to affiliates, balance		14,888				14,888
Distributions from equity affiliates						11,224	15,552
Interest income		286,522			336,474	905,002	1,000,159
Bridge loans
Investment in Equity Affiliates
Bridge loans, total UPB	$ 100,300
Houston Properties
Investment in Equity Affiliates
Proceeds from sale of real estate	$ 101,300
Houston Properties | Bridge loans
Investment in Equity Affiliates
Variable rate, spread	3.00%
Capital Partner | AWC Real Estate Opportunity Partners I LP
Investment in Equity Affiliates
Subsidiary, non-controlling limited partnership interest			51.00%
General partnership, ownership interest			17.50%
Unconsolidated VIEs | Houston Properties | Bridge loans
Investment in Equity Affiliates
Short-term debt	$ 95,300
AWC Real Estate Opportunity Partners I LP
Investment in Equity Affiliates
Real estate investments, commitment, amount		9,400
Arbor Residential Investor LLC
Investment in Equity Affiliates
Income (loss) from equity affiliates		(1,000)			(1,300)	(100)	1,300
Distribution received					7,500	$ 7,700	15,000
Indirect ownership percentage						9.20%		9.20%
Loans to affiliates, balance		0				$ 0
AMAC Holdings III LLC
Investment in Equity Affiliates
Distribution received							1,100
Noncontrolling interest						2,600
Loss on investment		500			700	1,700	1,600
Loans to affiliates, balance		0				0
Fifth Wall Ventures
Investment in Equity Affiliates
Income (loss) from equity affiliates		(300)			(800)	100	(1,000)
Noncontrolling interest		100				800	800
Loans to affiliates, balance		0				0
AWC Real Estate Opportunity Partners I LP
Investment in Equity Affiliates
Income (loss) from equity affiliates		(200)				(400)
Noncontrolling interest		5,100				13,600
Real estate investments, commitment, amount				$ 24,000
Real estate investments funded				$ 13,000				$ 13,000
Percentage of interest in real estate fund				0.990
Loan to affiliate				$ 900
General partnership interest				0.010
Loan to affiliate, funded amount		$ 300				$ 300
Ownership interest, percentage		49.00%				49.00%
Payments for investments, legal, and administrative expenses				$ 14,300
Loans to affiliates, balance		$ 13,200		13,200		$ 13,200		13,200
Distributions from equity affiliates		11,200
Interest income		2,400				9,000
AWC Real Estate Opportunity Partners I LP | Federal National Mortgage Association (FNMA)
Investment in Equity Affiliates
Loans to affiliates, balance				13,000				$ 13,000
AWC Real Estate Opportunity Partners I LP | AWC Real Estate Opportunity Partners I LP
Investment in Equity Affiliates
Ownership interest, percentage			49.00%
AWC Real Estate Opportunity Partners I LP | Capital Partner
Investment in Equity Affiliates
Real estate investments, commitment, amount			$ 25,000
Loan to affiliate, funded amount		$ 16,300				$ 16,300
Newly Formed Entity | AWC Real Estate Opportunity Partners I LP
Investment in Equity Affiliates
Ownership interest, percentage			42.00%
Payments to acquire interest in newly formed entity			$ 6,300
North Vermont Avenue | Newly Formed Entity
Investment in Equity Affiliates
Equity method investment, amount sold				$ 1,300
The Park at Via Terrossa
Investment in Equity Affiliates
Ownership interest, percentage		4.96%				4.96%
Loans to affiliates, balance		$ 0				$ 0
The Park at Via Terrossa | Other Related Party Transactions
Investment in Equity Affiliates
Distribution from investment classified as return capital						600
Lexford Portfolio
Investment in Equity Affiliates
Distribution received		4,900				9,000	7,200
Loans to affiliates, balance		$ 0				$ 0
Equity Participation Interest
Investment in Equity Affiliates
Proceeds from sale					$ 3,500		$ 14,500

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Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16)(a)(1))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

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