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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		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net gain/(loss) on residential whole loans measured at fair value through earnings	$ 16,430	$ (130,703)	$ 4,917	$ (1,529)
Residential whole loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net gain/(loss) on residential whole loans measured at fair value through earnings	16,430	(130,703)	4,917	(1,529)
Residential whole loan | Business purpose loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net gain/(loss) on residential whole loans measured at fair value through earnings	(11,474)	(35,931)	(13,587)	580
Residential whole loan | 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	(5,413)	304	(4,121)	398
Residential whole loan | 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	(24,503)	146	(27,073)	2,073
Residential whole loan | 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	18,442	(36,381)	17,607	(1,891)
Residential whole loan | Non-QM loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net gain/(loss) on residential whole loans measured at fair value through earnings	32,107	(87,136)	29,569	1,728
Residential whole loan | 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	(3,621)	(6,733)	(9,921)	(4,502)
Residential whole loan | Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net gain/(loss) on residential whole loans measured at fair value through earnings	$ (582)	$ (903)	$ (1,144)	$ 665

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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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