Mortgage-Backed Securities - Schedule of Gain (Loss) on Investments (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Investments, Debt and Equity Securities [Abstract]
Gross realized gains on sale of MBS	$ 0	$ 4,247	$ 676	$ 5,170
Gross realized losses on sale of MBS	0	(2,420)	(233)	(8,809)
Net unrealized gains (losses) on MBS accounted for under the fair value option	(21,226)	(7,095)	(76,609)	80,529
Total gain (loss) on investments, net	$ (21,226)	$ (5,268)	$ (76,166)	$ 76,890

Amount of unrealized and realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in net income (trading).

+ References

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Amount of realized loss on investment in debt security measured at fair value with change in fair value recognized in net income (trading).

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For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings.

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