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Residential Investor Loans - Narrative (Details) $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2025 USD ($)	Jun. 30, 2025 USD ($)	Dec. 31, 2024 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) securitization	Sep. 30, 2024 USD ($)
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Real estate owned, variable rate (as a percent)					37.00%
Real estate owned, fixed rate (as a percent)					0.63
Investment fair value changes, net	$ (6,971)			$ (12,202)	$ (96,863)	$ 10,733
AFS	284,372		$ 211,474		284,372
Principal payments on real estate securities					15,756	5,331
Mortgage banking activities, net	40,132			39,569	114,042	73,049
Fee income, net	4,579			4,788	$ 9,139	7,452
Securitization entity \| securitization					3
Unsecuritized residential investor bridge loan modifications (UPB)					$ 130,149
Estimated Fair Value
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Total Non-Accrual Loans	307,111				307,111
Carrying Value
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Total Non-Accrual Loans	358,269				358,269
Carrying Value \| Non-Accrual of Contractual Coupon Interest
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Total Non-Accrual Loans	229,136				229,136
Carrying Value \| Non-Accrual of Deferred Interest Only
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Total Non-Accrual Loans	$ 129,133				129,133
Simple Modifications (Extensions)
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Unsecuritized residential investor bridge loan modifications (UPB)					126,254
Financing receivable, previously modified					4,000
Complex Modifications
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Unsecuritized residential investor bridge loan modifications (UPB)					$ 3,895
Contractual interest rate	10.73%				10.73%
Financing receivable, previously modified					$ 38,000
CoreVest Mortgage Banking
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Mortgage banking activities, net	$ 11,413			12,854	38,776	32,262
Commitment To Fund Residential Investor Bridge Loan
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Funding commitment	261,000				261,000
Commitment To Fund Residential Investor Bridge Loan \| Corporate Joint Venture
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Funding commitment	84,000				84,000
Commitment To Fund Residential Bridge Loan
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Funding commitment	35,000				35,000
Residential Investor Bridge, Unsecuritized
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Fair value of loans	101,000				101,000
Principal payments on real estate securities	625,196			67,655	1,007,770	277,170
Legacy Bridge Loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Fair value of loans	484,000	$ 484,000			484,000
Investment fair value changes, net		6,000
Servicer advance financing
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Investment fair value changes, net	(1,000)			(4,000)	(6,000)	4,000
Subordinate Securities
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
AFS	284,372		140,242		284,372
Subordinate Securities \| Legacy Investments
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
AFS	$ 182,000	$ 182,000			$ 182,000
Residential Investor Term Loans \| Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Financing receivable, term	5 years				5 years
Residential Investor Term Loans \| Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Financing receivable, term	30 years				30 years
Bridge Loans \| Minimum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Residential bridge loans held-for-investment, original maturities (in months)					8 months
Bridge Loans \| Maximum
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Residential bridge loans held-for-investment, original maturities (in months)					36 months
Total Residential Investor Loans
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Fair value of loans	$ 3,857,597		4,587,090		$ 3,857,597
Total Residential Investor Loans \| Residential Investor Bridge, Unsecuritized
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Fair value of loans	625,932		1,120,281		625,932
Residential Investor Bridge
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Loans sold	114,000				416,000
Principal payments on real estate securities	6,000			$ 13,000	38,000	$ 34,000
Unsecuritized residential investor bridge loan modifications (UPB)	130,000		353,000
Residential Investor Bridge \| Non-Accrual of Contractual Coupon Interest
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Total Non-Accrual Loans			151,000
Residential Investor Bridge \| Non-Accrual of Deferred Interest Only
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Total Non-Accrual Loans			192,000
Residential Investor Bridge \| Estimated Fair Value
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Total Non-Accrual Loans			282,000
Residential Investor Bridge \| Carrying Value
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Total Non-Accrual Loans			343,000
Residential Investor Bridge \| Simple Modifications (Extensions)
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Unsecuritized residential investor bridge loan modifications (UPB)			$ 167,000
Contractual interest rate			8.64%
Financing receivable, modified, weighted average interest rate, deferred			0.0539
Financing receivable, previously modified			$ 24,000
Residential Investor Bridge \| Complex Modifications
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Unsecuritized residential investor bridge loan modifications (UPB)			186,000
Financing receivable, previously modified			103,000
Held-for-sale at fair value
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Fair value of loans	783,271		237,224		783,271
Held-for-sale at fair value \| Residential Investor Bridge, Unsecuritized
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Fair value of loans	$ 625,932		$ 78,587		$ 625,932