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Securities, at Fair Value - Narrative (Details) - USD ($)		3 Months Ended					9 Months Ended
		Sep. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items]
Securities, at fair value	[1]	$ 2,259,657,000					$ 2,259,657,000		$ 1,537,513,000
Proceeds from sales of securities							20,790,000	$ 45,619,000
Securities, at fair value
Debt Securities, Available-for-sale [Line Items]
Residential whole loans, fair value									54,600,000
CRT securities
Debt Securities, Available-for-sale [Line Items]
CRT securities		61,200,000					61,200,000		67,600,000
Securities, at fair value		47,800,000					47,800,000		51,500,000
Proceeds from sales of securities			$ 2,600,000
Realized gain on securities sold			200,000
Proceeds from sale of MSR				$ 16,000,000
Gain on sale of MSR				7,300,000
Gross unrealized losses		0					0		0
Non-agency MBS
Debt Securities, Available-for-sale [Line Items]
Securities, at fair value		22,400,000					22,400,000		22,600,000
Gross unrealized losses		100,000					100,000		$ 500,000
Agency Bond
Debt Securities, Available-for-sale [Line Items]
Proceeds from sales of securities		18,200,000
Realized gain on securities sold		700,000
Residential mortgage securities
Debt Securities, Available-for-sale [Line Items]
Proceeds from sales of securities			$ 0			$ 0
Proceeds from sale of MSR					$ 29,600,000
Gain on sale of MSR					$ 2,700,000
AFS securities
Debt Securities, Available-for-sale [Line Items]
Gross unrealized losses		0					0
Allowance for loan loss		$ 0		$ 0			$ 0	$ 0
[1] See Note 6 for information regarding the Company’s pledged assets.

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