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
Mar. 31, 2025	Mar. 31, 2024
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	$ 7,459,137	$ 7,455,729
Purchases and originations	505,691	488,051
Draws	101,170	163,744
Changes in fair value recorded in Net gain/(loss) on residential whole loans measured at fair value through earnings	52,900	10,208
Repayments	(549,218)	(346,564)
Loan sales and repurchases	(70,352)	(159,895)
Transfer to REO	(20,398)	(12,020)
Balance at end of period	$ 7,478,930	$ 7,599,253

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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Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Collection Of Principal

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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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- Definition

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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