Available-for-Sale Securities, at Fair Value - AFS Investment Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Debt Securities, Available-for-sale [Line Items]
Total available-for-sale securities	$ 5,091,319	$ 6,514,471
Federal National Mortgage Association
Debt Securities, Available-for-sale [Line Items]
Total available-for-sale securities	2,659,350	3,972,844
Federal Home Loan Mortgage Corporation
Debt Securities, Available-for-sale [Line Items]
Total available-for-sale securities	2,421,783	2,362,636
Government National Mortgage Association
Debt Securities, Available-for-sale [Line Items]
Total available-for-sale securities	7,204	175,732
Non-Agency
Debt Securities, Available-for-sale [Line Items]
Total available-for-sale securities	$ 2,982	$ 3,259

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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+ Details

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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