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Residential Whole Loans - Net Gain/(Loss) on Residential Whole Loans Measured at Fair Value (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net gain/(loss) on residential whole loans measured at fair value through earnings	$ 54,380	$ (11,513)
Residential whole loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net gain/(loss) on residential whole loans measured at fair value through earnings	54,380	(11,513)
Residential whole loans | Business purpose loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net gain/(loss) on residential whole loans measured at fair value through earnings	6,747	(2,112)
Residential whole loans | Business purpose loans | Single-family transitional loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net gain/(loss) on residential whole loans measured at fair value through earnings	(9,149)	1,292
Residential whole loans | Business purpose loans | Multifamily transitional loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net gain/(loss) on residential whole loans measured at fair value through earnings	(1,935)	(2,570)
Residential whole loans | Business purpose loans | Single-family rental loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net gain/(loss) on residential whole loans measured at fair value through earnings	17,831	(834)
Residential whole loans | Non-QM loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net gain/(loss) on residential whole loans measured at fair value through earnings	45,196	(2,538)
Residential whole loans | Legacy RPL/NPL loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net gain/(loss) on residential whole loans measured at fair value through earnings	949	(6,301)
Residential whole loans | Other Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net gain/(loss) on residential whole loans measured at fair value through earnings	$ 1,488	$ (562)

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Mortgage Loans On Real Estate, Gain (Loss) On Loans Measured At Fair Value

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 20
-Name Accounting Standards Codification
-Section 40
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481628/310-20-40-7

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-2

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