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Financing Agreements - Pledged Collateral (Details) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Asset Pledged as Collateral with Right |  |
Debt Instrument [Line Items] |  |
Fair value of securities pledged as collateral under financing agreements | $ 10,439,785 | $ 10,170,472
Accrued interest | 25,800 | 27,100
Securitized | Asset Pledged as Collateral with Right |  |
Debt Instrument [Line Items] |  |
Fair value of securities pledged as collateral under financing agreements | 7,052,710 | 6,913,710
Non-Mark-to-Market | Asset Pledged as Collateral with Right |  |
Debt Instrument [Line Items] |  |
Fair value of securities pledged as collateral under financing agreements | 562,959 | 740,260
Mark-to-Market | Asset Pledged as Collateral with Right |  |
Debt Instrument [Line Items] |  |
Fair value of securities pledged as collateral under financing agreements | 2,824,116 | 2,516,502
Residential whole loans | Asset Pledged as Collateral with Right |  |
Debt Instrument [Line Items] |  |
Fair value of securities pledged as collateral under financing agreements | 8,720,446 | 8,734,115
Residential whole loans | Securitized | Asset Pledged as Collateral with Right |  |
Debt Instrument [Line Items] |  |
Fair value of securities pledged as collateral under financing agreements | 7,022,048 | 6,886,776
Residential whole loans | Non-Mark-to-Market | Asset Pledged as Collateral with Right |  |
Debt Instrument [Line Items] |  |
Fair value of securities pledged as collateral under financing agreements | 562,959 | 740,260
Residential whole loans | Mark-to-Market | Asset Pledged as Collateral with Right |  |
Debt Instrument [Line Items] |  |
Fair value of securities pledged as collateral under financing agreements | 1,135,439 | 1,107,079
Securities, at fair value | Asset Pledged as Collateral with Right |  |
Debt Instrument [Line Items] |  |
Fair value of securities pledged as collateral under financing agreements | 1,631,474 | 1,352,918
Securities, at fair value | Securitized | Asset Pledged as Collateral with Right |  |
Debt Instrument [Line Items] |  |
Fair value of securities pledged as collateral under financing agreements | 0 | 0
Securities, at fair value | Non-Mark-to-Market | Asset Pledged as Collateral with Right |  |
Debt Instrument [Line Items] |  |
Fair value of securities pledged as collateral under financing agreements | 0 | 0
Securities, at fair value | Mark-to-Market | Asset Pledged as Collateral with Right |  |
Debt Instrument [Line Items] |  |
Fair value of securities pledged as collateral under financing agreements | 1,631,474 | 1,352,918
Other assets: REO | Asset Pledged as Collateral with Right |  |
Debt Instrument [Line Items] |  |
Fair value of securities pledged as collateral under financing agreements | 87,865 | 83,439
Other assets: REO | Securitized | Asset Pledged as Collateral with Right |  |
Debt Instrument [Line Items] |  |
Fair value of securities pledged as collateral under financing agreements | 30,662 | 26,934
Other assets: REO | Non-Mark-to-Market | Asset Pledged as Collateral with Right |  |
Debt Instrument [Line Items] |  |
Fair value of securities pledged as collateral under financing agreements | 0 | 0
Other assets: REO | Mark-to-Market | Asset Pledged as Collateral with Right |  |
Debt Instrument [Line Items] |  |
Fair value of securities pledged as collateral under financing agreements | 57,203 | 56,505
Non-agency MBS | Mark-to-Market |  |
Debt Instrument [Line Items] |  |
Fair value of securities pledged as collateral under financing agreements | 495,900 | 506,600
Carrying value | $ 391,900 | $ 394,900

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