Fair Value of Financial Instruments - Level 3 Assets (Details) - Recurring basis - Level 3 - Residential whole loans, at fair value - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	$ 7,599,254	$ 6,013,378	$ 7,455,729	$ 5,676,430
Purchases and originations	536,071	734,748	1,024,121	1,071,563
Draws	152,160	132,914	315,905	251,991
Changes in fair value recorded in Net gain/(loss) on residential whole loans measured at fair value through earnings	16,682	(129,797)	26,889	(2,193)
Repayments	(555,099)	(293,792)	(901,662)	(527,226)
Loan sales and repurchases	(13,944)	(900)	(173,839)	(1,477)
Transfer to REO	(15,933)	(14,586)	(27,952)	(27,123)
Balance at end of period	$ 7,719,191	$ 6,441,965	$ 7,719,191	$ 6,441,965

Fair Value, Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Asset, Originations And Draws

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Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value, Sales And Repurchases

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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- Definition

Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3).

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Amount of purchases of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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- Definition

Amount of transfer of financial instrument classified as an asset into (out of) level 3 of the fair value hierarchy.

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