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Residential Investor Loans - Activity and Characteristics of Residential Investor Loans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Principal balance of loans originated			$ 4,910,749	$ 1,051,236
Principal payments on real estate securities			5,331	950
Term at Redwood | Redwood
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Principal balance of loans originated	$ 158,584	$ 105,777	493,212	408,477
Principal balance of loans acquired	3,145	0	3,793	0
Principal payments on real estate securities	206,380	27,436	464,836	425,542
Fair value of loans transferred	0	(278,751)	0	(278,751)
Net market valuation gains (losses) recorded	(1,500)	0	(2,837)	(14,430)
Term at Redwood | Redwood | Total residential mortgage banking activities, net
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Net market valuation gains (losses) recorded	6,061	1,600	11,833	13,214
Residential investor bridge loans held-for-investment | Redwood
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Principal balance of loans originated	286,833	303,284	714,977	828,149
Principal balance of loans acquired	0	1,820	15,677	19,054
Principal payments on real estate securities	67,655	34,061	277,170	65,868
Fair value of loans transferred	(62,386)	(116,679)	(250,319)	(337,657)
Net market valuation gains (losses) recorded	(10,293)	(16,899)	(27,503)	(22,867)
Residential investor bridge loans held-for-investment | Redwood | Total residential mortgage banking activities, net
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Net market valuation gains (losses) recorded	694	1,438	2,748	4,808
Total Residential Investor Loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Fair value of loans	4,746,174		4,746,174		$ 5,220,298
Total Residential Investor Loans | Residential investor term loans held by CAFL
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Net market valuation gains (losses) recorded	78,275	(1,360)	89,388	(1,961)
Single Family Rental Loans Held For Investment At Fair Value | Residential investor term loans held by CAFL
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Fair value of loans transferred to HFI	0	278,751	0	278,751
Unpaid principal balance	2,790,755		2,790,755		3,194,131
Average UPB of loans	3,037		3,037		3,028
Fair value of loans	$ 2,661,885		$ 2,661,885		$ 2,971,725
Weighted average coupon	5.36%		5.36%		5.34%
Weighted average remaining loan term (years)			4 years		5 years
Fair value of loans with 90+ day delinquencies	$ 18,646		$ 18,646		$ 15,708
Average UPB of 90+ day delinquencies	2,936		2,936		2,244
Single Family Rental Loans Held For Investment At Fair Value | Residential investor term loans held by CAFL | Financing Receivables, Equal to Greater than 90 Days Past Due
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Fair value of loans with 90+ day delinquencies	161,874		161,874		143,623
Average UPB of 90+ day delinquencies	3,948		3,948		3,192
Bridge at CAFL | Residential investor term loans held by CAFL
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Net market valuation gains (losses) recorded	1,623	(2,560)	443	(1,960)
Fair value of loans transferred to HFI	62,386	$ 116,679	250,319	$ 337,657
Single-Family Rental Loans, Held-For-Sale | Redwood
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Unpaid principal balance	183,358		183,358		152,213
Average UPB of loans	2,108		2,108		4,006
Fair value of loans	$ 174,485		$ 174,485		$ 144,359
Weighted average coupon	6.88%		6.88%		6.92%
Weighted average remaining loan term (years)			7 years		7 years
Fair value of loans with 90+ day delinquencies	$ 27,529		$ 27,529		$ 28,263
Average UPB of 90+ day delinquencies	27,529		27,529		14,132
Unpaid principal balance of loans in foreclosure	13,250		13,250		16,822
Single-Family Rental Loans, Held-For-Sale | Redwood | Financing Receivables, Equal to Greater than 90 Days Past Due
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Fair value of loans	19,320		19,320		16,822
Fair value of loans with 90+ day delinquencies	34,083		34,083		28,263
Average UPB of 90+ day delinquencies	11,361		11,361		14,132
Single-Family Rental Loans, Held-For-Sale | Redwood | Loans Pledged As Collateral, Short Term Debt
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Net market valuation gains (losses) recorded			133,022		124,934
Business Purpose Bridge Loans | Redwood
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Unpaid principal balance	1,336,767		1,336,767		1,360,957
Average UPB of loans	5,161		5,161		8,453
Fair value of loans	$ 1,302,474		$ 1,302,474		$ 1,341,618
Weighted average coupon	9.14%		9.14%		10.41%
Weighted average remaining loan term (years)			1 year		1 year
Fair value of loans with 90+ day delinquencies	$ 86,019		$ 86,019		$ 79,841
Average UPB of 90+ day delinquencies	7,820		7,820		5,323
Unpaid principal balance of loans in foreclosure	72,212		72,212		69,046
Business Purpose Bridge Loans | Redwood | Financing Receivables, Equal to Greater than 90 Days Past Due
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Fair value of loans	113,904		113,904		86,137
Fair value of loans with 90+ day delinquencies	132,286		132,286		96,934
Average UPB of 90+ day delinquencies	7,782		7,782		5,702
Business Purpose Bridge Loans | Redwood | Loans Pledged As Collateral, Short Term Debt
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Net market valuation gains (losses) recorded			1,250,392		1,298,198
Business Purpose Bridge Loans | Residential investor term loans held by CAFL
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Unpaid principal balance	600,267		600,267		756,574
Average UPB of loans	2,035		2,035		2,162
Fair value of loans	$ 607,330		$ 607,330		$ 762,596
Weighted average coupon	10.16%		10.16%		10.82%
Weighted average remaining loan term (years)			1 year		1 year
Fair value of loans with 90+ day delinquencies	$ 13,426		$ 13,426		$ 3,931
Average UPB of 90+ day delinquencies	1,918		1,918		1,310
Business Purpose Bridge Loans | Residential investor term loans held by CAFL | Financing Receivables, Equal to Greater than 90 Days Past Due
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Fair value of loans with 90+ day delinquencies	24,993		24,993		10,646
Average UPB of 90+ day delinquencies	$ 1,785		$ 1,785		$ 1,774

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Loan, Transfer from Held-for-Sale to Held-in-Portfolio, Net Of Substitutions

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The cash inflow from repayments of the balance excluding interest (principal) on real estate securities.

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This item represents the aggregate fair value of loans held as assets that are 90 days or more past due for which the fair value option has been elected.

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Amount of realized and unrealized gain (loss) on investment.

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Amortized cost, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

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