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Basis of Presentation and Significant Accounting Policies (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Investments in RMBS [Abstract]
Purchase of RMBS, settled after period end				$ 15,087	$ 28,337
Cash and Cash Equivalents and Restricted Cash [Abstract]
Restricted cash		$ 9,204	$ 4,502	9,204	4,502	$ 24,446
Variation margin		34,900		34,900		61,300
Realized loss on RMBS, net [Abstract]
Loss on RMBS, available-for-sale, measured at fair value through OCI	[1]	0	(3,499)	(3,074)	(3,499)
Loss on RMBS measured at fair value through earnings		0	(152)	(2,971)	(2,011)
Realized loss on RMBS, net		0	$ (3,651)	(6,045)	$ (5,510)
MSRs [Member]
Investments in MSRs [Abstract]
Reserve for unrecoverable advances		0		0		0
Derivatives [Member]
Cash and Cash Equivalents and Restricted Cash [Abstract]
Restricted cash		7,800		7,800		4,300
Repurchase Agreements [Member]
Cash and Cash Equivalents and Restricted Cash [Abstract]
Restricted cash		1,400		1,400		20,100
Receivables and Other Assets [Member] | RMBS [Member]
Investments in RMBS [Abstract]
Interest receivable		$ 4,900		$ 4,900		$ 4,700
[1] Reclassified from accumulated other comprehensive income into earnings.

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