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Basis of Presentation and Significant Accounting Policies (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Cash and Cash Equivalents and Restricted Cash [Abstract]          
Restricted cash $ 9,953 $ 6,113 $ 9,953 $ 6,113 $ 24,446
Variation margin 42,100   42,100   61,300
Realized loss on RMBS, net [Abstract]          
Loss on RMBS, available-for-sale, measured at fair value through OCI [1] 0 0 (3,074) 0  
Loss on RMBS measured at fair value through earnings (2,053) (1,859) (2,971) (1,859)  
Realized loss on RMBS, net (2,053) $ (1,859) (6,045) $ (1,859)  
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 10,000   10,000   4,300
Repurchase Agreements [Member]          
Cash and Cash Equivalents and Restricted Cash [Abstract]          
Restricted cash 0   0   20,100
Receivables and Other Assets [Member] | RMBS [Member]          
Investments in RMBS [Abstract]          
Interest receivable $ 4,800   $ 4,800   $ 4,700
[1] Reclassified from accumulated other comprehensive income into earnings.